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Configuring APPN
Services

BayRS Version 13.00
Site Manager Software Version 7.00

Part No. 303511-A Rev 00
October 1998

4401 Great America Parkway
Santa Clara, CA 95054

8 Federal Street
Billerica, MA 01821

Copyright © 1998 Bay Networks, Inc.
All rights reserved. Printed in the USA. October 1998.
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303511-A Rev 00

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303511-A Rev 00

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303511-A Rev 00

Contents

Preface
Before You Begin .............................................................................................................xiii
Text Conventions .............................................................................................................xiv
Acronyms .........................................................................................................................xvi
Bay Networks Technical Publications .............................................................................xvii
How to Get Help ............................................................................................................ xviii
Chapter 1
Advanced Peer-to-Peer Networking Overview
APPN Networking Overview ..........................................................................................1-2
APPN Node Types ..........................................................................................................1-2
Network Nodes ........................................................................................................1-3
End Nodes ..............................................................................................................1-3
Low-Entry Networking Nodes .................................................................................1-3
Control Points and Logical Units ....................................................................................1-5
Dependent Logical Unit Requester and Server ..............................................................1-6
lnterfaces, Ports, and Link Stations ................................................................................1-8
Interfaces .................................................................................................................1-9
Ports .........................................................................................................................1-9
Link Stations .............................................................................................................1-9
Connection Networks ..................................................................................................1-10
Intermediate Session Routing .....................................................................................1-12
Packet Segmentation and Reassembly .................................................................1-13
Adaptive Pacing .....................................................................................................1-13
High Performance Routing ...........................................................................................1-14
Rapid Transport Protocol ................................................................................1-16
Non-Disruptive Path Switching ........................................................................1-16
End-to-End Error Recovery .............................................................................1-17
End-to-End Flow and Congestion Control .......................................................1-17

303511-A Rev 00

Automatic Network Routing ....................................................................................1-18
Fast Packet Switching ......................................................................................1-18
Session Transparency .....................................................................................1-18
Source Routing ................................................................................................1-18
APPN Services ............................................................................................................1-19
Session Services ..................................................................................................1-19
Directory Services .................................................................................................1-20
Topology and Routing Services .............................................................................1-20
Configuration Services ..........................................................................................1-21
Management Services ..........................................................................................1-21
For More Information About APPN ...............................................................................1-22
Chapter 2
Enabling APPN Services
Using the Parameter Descriptions ..................................................................................2-1
Enabling APPN over LLC2 Interfaces ............................................................................2-2
Enabling APPN over LLC2 Interfaces Using SRB .........................................................2-7
Enabling APPN Interfaces over SDLC .........................................................................2-12
Chapter 3
Editing APPN Parameters
Using the Parameter Descriptions ..................................................................................3-1
Accessing APPN Parameters .........................................................................................3-2
Editing APPN Global Parameters ...................................................................................3-3
APPN Global Advanced Parameters .......................................................................3-5
Editing APPN lnterfaces and Ports ..............................................................................3-15
Deleting APPN Interfaces .....................................................................................3-17
Editing APPN Ports ...............................................................................................3-17
Deleting APPN Ports .............................................................................................3-19
Adding Ports to an APPN Interface .......................................................................3-20
Editing APPN Advanced Port Parameters .............................................................3-23
Editing APPN Adjacent Link Stations ...........................................................................3-35
Deleting Adjacent Link Stations ............................................................................3-42
Adding Adjacent Link Stations ...............................................................................3-43
Editing Advanced Adjacent Link Station Parameters .............................................3-49

303511-A Rev 00

Editing APPN Connection Networks .............................................................................3-57
Adding APPN Connection Networks .....................................................................3-59
Deleting APPN Connection Networks ....................................................................3-60
Editing APPN Connection Network Ports ...............................................................3-61
Adding APPN Connection Network Ports .............................................................3-62
Deleting APPN Connection Network Ports ............................................................3-63
Editing APPN Advanced Connection Network Parameters ....................................3-63
Editing APPN Directory Entry Parameters ...................................................................3-68
Adding APPN LU Names to Directory Services .....................................................3-71
Deleting APPN Directory Entires ...........................................................................3-74
Appendix A
APPN Base and Optional Function Sets
Appendix B
APPN Default Settings
Index

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vii

Figures

Figure 1-1.

APPN Network with Different Node Types ..............................................1-4

Figure 1-2.

CP-CP and LU-LU Sessions ....................................................................1-5

Figure 1-3.

DLUR and DLUS in an APPN Network ....................................................1-7

Figure 1-4.

Interface, Port, and Link Station Relationship ..........................................1-8

Figure 1-5.

Sample APPN Connection Network .......................................................1-11

Figure 1-6.

Nonadjacent LU-LU Session Through an Intermediate Node ...............1-12

Figure 1-7.

APPN ISR Routing Functions in SNA Architecture ................................1-13

Figure 1-8.

APPN HPR Routing Functions in SNA Architecture ..............................1-15

Figure 1-9.

HPR RTP Connection Supporting APPN Sessions ...............................1-16

Figure 1-10. HPR ANR Routing and Packet Handling Operations .............................1-19
Figure 2-1.

Source Route Encapsulation Dialog Box .................................................2-3

Figure 2-2.

APPN Local Node Name Configuration Window .....................................2-3

Figure 2-3.

APPN/FR Configuration Window .............................................................2-5

Figure 2-4.

Adjacent Link Station Dialog Box .............................................................2-6

Figure 2-5.

Source Route Encapsulation Dialog Box .................................................2-7

Figure 2-6.

Source Routing Global Parameters Window ............................................2-8

Figure 2-7.

Edit SR Interface Window ......................................................................2-10

Figure 2-8.

APPN Virtual Ring Number Configuration Window ...............................2-11

Figure 2-9.

SDLC Line Parameters Window ............................................................2-13

Figure 2-10. Select Protocols Window .......................................................................2-17
Figure 2-11. APPN Local Node Name Configuration Window ...................................2-17
Figure 2-12. APPN SDLC Address Configuration Window ........................................2-18
Figure 2-13. Adjacent Link Station Dialog Box ...........................................................2-19
Figure 3-1.

Configuration Manager Window ..............................................................3-2

Figure 3-2.

Edit APPN Global Parameters Window ...................................................3-3

Figure 3-3.

Advanced APPN Global Parameters Window ..........................................3-6

Figure 3-4.

APPN Interface List Window ..................................................................3-16

Figure 3-5.

APPN Port List Window .........................................................................3-18

Figure 3-6.

APPN/FR Port Configuration Window ....................................................3-20

303511-A Rev 00

Figure 3-7.

APPN Port Window ................................................................................3-24

Figure 3-8.

APPN Adjacent Link Station List Window ..............................................3-35

Figure 3-9.

APPN Adjacent Link Station Port Configuration Window .......................3-43

Figure 3-10. APPN Adjacent Link Station Configuration Window ..............................3-44
Figure 3-11. APPN Adjacent Link Station Advanced Configuration Window .............3-50
Figure 3-12. APPN Connection Network List Window ...............................................3-58
Figure 3-13. Connection Network Configuration Window ..........................................3-59
Figure 3-14. APPN Connection Network Port List Window ........................................3-61
Figure 3-15. Connection Network Port Configuration Window ...................................3-62
Figure 3-16. APPN Connection Network Advanced Parameters Window ..................3-64
Figure 3-17. APPN Directory Entry List Window ........................................................3-69
Figure 3-18. Directory Entry Configuration Window ...................................................3-71

303511-A Rev 00

Tables

Table 3-1.

Link Activation Limit Default Values ......................................................3-27

Table A-1.

APPN Base Function Sets ..................................................................... A-1

Table A-2.

APPN Optional Function Sets ................................................................ A-4

Table B-1.

APPN Global and Advanced Global Parameters ................................... B-1

Table B-2.

APPN Interface and Port Parameters .................................................... B-2

Table B-3.

APPN Adjacent Link Station Parameters ............................................... B-4

Table B-4.

APPN Connection Networks and Port Parameters ................................ B-5

Table B-5.

APPN Directory Services Parameters ................................................... B-6

303511-A Rev 00

Preface

This guide describes Advanced Peer-to-Peer Networking (APPN) services and
what you do to start and customize APPN services on a Bay Networks® router.

Before You Begin
Before using this guide, you must complete the following procedures. For a new
router:
•

Install the router (see the installation guide that came with your router).

•

Connect the router to the network and create a pilot configuration file (see
Quick-Starting Routers, Configuring BayStack Remote Access, or Connecting
ASN Routers to a Network).

Make sure that you are running the latest version of Bay Networks BayRS™ and
Site Manager software. For information about upgrading BayRS and Site
Manager, see the upgrading guide for your version of BayRS.

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Configuring APPN Services

Text Conventions
This guide uses the following text conventions:
angle brackets (< >)

Indicate that you choose the text to enter based on the
description inside the brackets. Do not type the
brackets when entering the command.
Example: If the command syntax is:
ping , you enter:
ping 192.32.10.12

bold text

Indicates text that you need to enter and command
names and options.
Example: Enter show ip {alerts | routes}
Example: Use the dinfo command.

braces ({})

Indicate required elements in syntax descriptions
where there is more than one option. You must choose
only one of the options. Do not type the braces when
entering the command.
Example: If the command syntax is:
show ip {alerts | routes}, you must enter either:
show ip alerts or show ip routes.

brackets ([ ])

Indicate optional elements in syntax descriptions. Do
not type the brackets when entering the command.
Example: If the command syntax is:
show ip interfaces [-alerts], you can enter either:
show ip interfaces or show ip interfaces -alerts.

ellipsis points (. . . )

Indicate that you repeat the last element of the
command as needed.
Example: If the command syntax is:
ethernet/2/1 [ ] . . ., you enter
ethernet/2/1 and as many parameter-value pairs as

needed.

xiv

303511-A Rev 00

Preface

italic text

Indicates file and directory names, new terms, book
titles, and variables in command syntax descriptions.
Where a variable is two or more words, the words are
connected by an underscore.
Example: If the command syntax is:
show at
valid_route is one variable and you substitute one value

for it.
screen text

Indicates system output, for example, prompts and
system messages.
Example: Set Bay Networks Trap Monitor Filters

separator ( > )

Shows menu paths.
Example: Protocols > IP identifies the IP option on the
Protocols menu.

vertical line ( | )

Separates choices for command keywords and
arguments. Enter only one of the choices. Do not type
the vertical line when entering the command.
Example: If the command syntax is:
show ip {alerts | routes}, you enter either:
show ip alerts or show ip routes, but not both.

303511-A Rev 00

Configuring APPN Services

Acronyms

xvi

ANR

Automatic Network Routing

APPN

Advanced Peer-to-Peer Networking

COS

class of service

control point

DLC

data link control

DLCI

data link connection identifier

DLSw

data link switching

DLUR

dependent logical unit requester

DLUS

dependent logical unit server

directory services

DSPU

down stream physical unit

end node

entry point

FDDI

Fiber Distributed Data Interface

FQPCID

fully qualified procedure correlation identifier

GDS

general data stream

HPR

High Performance Routing

Internet Protocol

ISR

intermediate session routing

LAN

local area network

LEN

low-entry networking

LLC

logical link control

logical unit

MAC

media access control

MDS

multiple domain support

MIB

Management Information Base

NCP

Network Control Program

303511-A Rev 00

Preface

network node

NNS

network node server

PCID

procedure correlation identifier

physical unit

RSCV

route selection control vector

RTP

Rapid Transport Protocol

SAP

service access point

SATF

shared access transport facility

SDLC

Synchronous Data Link Control

SNA

Systems Network Architecture

SNMP

Simple Network Management Protocol

SRB

source routing bridge

SSCP

system services control point

transmission group

TPF

transmission priority field

VRN

virtual routing node

VTAM

Virtual Tecommunications Access Method

XID

exchange identification

Bay Networks Technical Publications
You can now print Bay Networks technical manuals and release notes free,
directly from the Internet. Go to support.baynetworks.com/library/tpubs/. Find the
Bay Networks product for which you need documentation. Then locate the
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Using Adobe Acrobat Reader, you can open the manuals and release notes, search
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download Acrobat Reader free from the Adobe Systems Web site,
www.adobe.com.

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Configuring APPN Services

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The “CD ROMs” section lists available CDs.

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services, go to the following URL:
http://www.baynetworks.com/corporate/contacts/
Or telephone the Bay Networks Technical Solutions Center at:
800-2LANWAN

xviii

303511-A Rev 00

Chapter 1
Advanced Peer-to-Peer Networking Overview

IBM Advanced Peer-to-Peer Networking (APPN) architecture concepts include:
•

APPN node types

•

Control points and logical units

•

Dependent logical unit requester and server

•

APPN interfaces, ports, and link stations

•

Connection networks

•

Intermediate session routing

•

High performance routing

•

APPN services

Review these concepts if you are responsible for configuring APPN on Bay
Networks routers in your network. If you are already familiar with APPN
concepts, go directly to Chapter 2 for information on starting APPN on a router.

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Configuring APPN Services

APPN Networking Overview
APPN is an architectural extension of IBM Systems Network Architecture (SNA).
As participants in an SNA network, APPN nodes use distributed network services
for dynamic routing, connection, topology, and directory information, simplifying
network definition and maintenance.
Bay Networks routers participate as APPN network nodes in IBM SNA network
environments (with or without the presence of an IBM mainframe computer) and
communicate with adjacent network nodes, end nodes, and low-entry networking
nodes. APPN runs on all Bay Networks router platforms using local and wide area
network facilities, as follows:
•

LLC2 media, including Ethernet, token ring, and frame relay

•

LLC2 using Source Routing Bridge (SRB) encapsulation formats over
Ethernet, FDDI, SMDS, frame relay, and Point-to-Point (PPP) protocols

•

SDLC links in point-to-point and multipoint configurations

The Bay Networks APPN implementation complies with Version 2 of the IBM
APPN Network Node specification, with advanced optional APPN function sets.

APPN Node Types
APPN supports the following node types:

1-2

•

Network nodes

•

End nodes

•

Low-entry networking nodes

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Advanced Peer-to-Peer Networking Overview

Network Nodes
Network nodes (NNs) provide routing and networking services to other network
nodes and end nodes. These services include locating network resources,
calculating routes, and routing sessions. NNs use configured or dynamic
control-point-to-control-point (CP-CP) sessions with adjacent nodes to manage,
communicate, and exchange network topology and resource information. Any
adjacent node that does not support control point sessions (such as a low-entry
networking node) cannot participate in this exchange and must rely on static
definitions. An NN that provides control point services to end nodes is called a
network node server (NNS).

End Nodes
End nodes (ENs) have control points that allow them to register and share network
information (using CP-CP sessions) with the NNS. End nodes provide APPN
services to local users and applications and can operate independently in simple
network configurations. In most configurations, end nodes are application hosts
and workstations that register their resources with their network node server.

Low-Entry Networking Nodes
Low-entry networking nodes (LENs) are the simplest type of node in an APPN
network. LEN nodes communicate with each other as adjacent peers.
LENs do not use control point sessions and cannot exchange resource information
with an NN. Therefore, the resource information for LENs is preconfigured and
supported at the NN. LENs typically include personal computers and
workstations.
Figure 1-1 illustrates a simple APPN network with the three APPN node types.

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Configuring APPN Services

Low-entry networking
node (LEN)

APPN network node
(NN)

AS/400 end node
(EN)

Low-entry networking
node (LEN)
APN0001A

Figure 1-1.

1-4

APPN Network with Different Node Types

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Control Points and Logical Units
APPN uses control points (CPs) to manage nodes and network resources by
establishing CP-CP sessions between nodes. All CP-CP sessions use logical unit
(LU) 6.2 sessions.
During a CP-CP session (Figure 1-2), adjacent nodes exchange network
information. Network nodes use CP-CP sessions to keep track of the network
topology and directory information. Adjacent end nodes use CP-CP sessions to
register resources and to request directory searches from the NNS.

End node
APPN.C

Network node
APPN.A

Network node
APPN.B

CP-CP, LU-LU
sessions

APN0002A

Figure 1-2.

CP-CP and LU-LU Sessions

In Figure 1-2, APPN.C registers its local resources with APPN.B, and sends
requests to APPN.B for information about the network and its resources. APPN.B
functions as an NNS for APPN.C.
APPN.B has CP-CP sessions with both APPN.A and APPN.C. In this example,
APPN.A and APPN.B exchange network topology and cooperate in directory
searches.

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Configuring APPN Services

Dependent Logical Unit Requester and Server
APPN’s Dependent Logical Unit Requester (DLUR) supports LU type 0, 1, 2, 3
and LU6.2 dependent logical units within APPN. In contrast to the base APPN
architecture, which uses independent LUs for LU-to-LU sessions, dependent LUs
need a mainframe-based system services control point (SSCP) to establish and
manage LU-to-LU sessions. DLUR allows these dependent LUs to use APPN
networks by encapsulating the SSCP control flows within the APPN LU 6.2
sessions. The APPN network routes the dependent LU-LU data flows.
DLUR works with the dependent LU server (DLUS) component of the virtual
telecommunications access method (VTAM) to provide a path for SSCP flows
between VTAM and dependent LUs across an arbitrary APPN backbone network.
The DLUR node serves as a point of connection for PU2.0 devices (such as
3270-type devices) to attach to an APPN backbone.
The DLUR and DLUS components in an APPN network allow the SSCP and the
PU2.0 device to exchange control flows across the APPN backbone. DLUR and
DLUS form a tunnel (called a CP-SVR pipe) that allows the SSCP at the DLUS
side of the pipe to send SNA control flows to the PU2.0 device at the DLUR side
of the pipe. The CP-SVR pipe is a pair of LU6.2 sessions that encapsulate the
SSCP control flows.
Figure 1-3 illustrates the DLUR and DLUS components in APPN.

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SSCP sessions
(encapsulated in
CP-SVR pipe

APPN network node
with DLUR

CP-SVR pipe
VTAM
with DLUS

PU2.0
LU-LU sessions
(natively routed by
APPN network)

APPN
backbone

VTAM

APN0003A

Figure 1-3.

DLUR and DLUS in an APPN Network

Typically, in a large network, multiple DLUS nodes serve many DLUR nodes
distributed across the APPN backbone. A DLUR node can establish pipes with
several DLUS nodes, although a single PU2.0 device can receive traffic from only
one of them, because the device is only controlled by a single SSCP.
When the SSCP and the PU2.0 device exchange control flows, BINDs establish
the path that the LU-LU session traffic uses through the network. Since the BIND
flows independently of the CP-SVR pipe, the LU-LU traffic can take a different
path through the network (the DLUS calculates a route using the topology
database and class of service [COS] definitions). Refer to the “APPN Services”
section in this chapter for information on the topology database and COS
definitions.

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Configuring APPN Services

lnterfaces, Ports, and Link Stations
APPN configurations comprise interfaces, ports, and link stations. Figure 1-4
shows how interfaces, ports, and link stations in a simple APPN network relate.

Note: In this guide, the term “interface” has the same meaning as data link
control (DLC) in IBM publications.

tion

ta
kS

APPN.NNA

Interface
E51,LLC2,DLC00001

Lin

APPN.ENA

PORT0001
Lin

tat

ion

tat

Lin

ion

3
APPN.ENB

APPN.LENC
APN0004A

Figure 1-4.

1-8

Interface, Port, and Link Station Relationship

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Advanced Peer-to-Peer Networking Overview

Interfaces
Interfaces provide data link control (DLC) processes to ensure reliable delivery of
information between adjacent stations using a specific data link protocol, such as
LLC or SDLC.
Each APPN interface can support one or more ports.
A system-assigned DLC number (such as DLC00008) identifies APPN interfaces
on Bay Networks network nodes.
For information on adding and enabling APPN interfaces on Bay Networks
network nodes, refer to Chapter 2.

Ports
A port provides a unique access point (such as a MAC/SAP address pair) used by
the local Bay Networks network node. A port in an APPN network has a DLC
process and a set of configurable parameters.

Link Stations
A link station is a logical connection between adjacent nodes. Link stations use
ports to create this connection. Multiple link stations can exist on a single port,
and multiple link stations can exist between the same two nodes. You can
configure a link station entry, or APPN creates it dynamically when a remote node
initiates a connection.
Note: The term link often refers to the physical components that enable two
adjacent link stations to communicate. Within APPN, a link refers to a logical
connection between two nodes. The term transmission group (TG) is also used
throughout this manual and has the same meaning as link.

Link stations have a set of configurable parameters, such as:

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•

Link station name and the name of the adjacent node

•

Adjacent link station role: primary, secondary, or negotiable

•

Adjacent link station definitions, such as MAC and SAP addresses

1-9

Configuring APPN Services

Connection Networks
APPN end nodes on a shared access transport facility (SATF), such as a token ring
network, are directly connected to each other; they can communicate with each
other without having to route traffic through an intermediate network node.
However, these end nodes still require definitions to other nodes and the nodes
must be accessible over CP-CP sessions. A connection network (CN) simplifies
APPN configurations by reducing the number of connections that you must
configure between nodes on an SATF.
When two nodes on the same SATF exist on the same connection network, these
nodes are unaware that they have a direct connection to each other; the NNS,
acting as an APPN virtual routing node (VRN), calculates a route between the two
end nodes so that they can communicate directly. For the end nodes to
communicate with each other over a connection network, the end nodes require a
connection to the VRN and a connection to the NNS.
Figure 1-5 illustrates a sample connection network. This connection network,
such as that between EN2 and EN3, may use resources at the network node (NN1)
to establish sessions with each other.

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EN2

EN3
EN2

EN3
Traffic

SATF

Virtual Routing
Node

NN1

EN4
APN0005A

Figure 1-5.

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Sample APPN Connection Network

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Configuring APPN Services

Intermediate Session Routing
Intermediate session routing (ISR) provides a reliable, connection-oriented,
LU-LU session path between nonadjacent APPN nodes. ISR session connectors
(SCs) and a session connection manager (SCM) forward sessions through the
intermediate network node (Figure 1-6).
At session endpoints, the LU, with control point services, establishes a session
with a session partner and routes session data back and forth with the partner LU.
INTERMEDIATE network nodes do not control the LU endpoints, and LU
services cannot be invoked on these nodes. ISR forwards session data to the next
node along the session path.

End Node C
LU-C
LU-A to LU-C
Session

Network Node A
LU-a

Intermediate
Network Node B
NNB

ISR Services

LU-A to LU-C
Session
APN0006A

Figure 1-6.

Nonadjacent LU-LU Session Through an Intermediate Node

In Figure 1-6, LU-A and LU-C are nonadjacent session partners. ISR at NNB
forwards session data between the nonadjacent nodes, LU-A and LU-C. NNB
creates a session connector (SC) for each session passing through it.
Figure 1-7 illustrates ISR function placement in the SNA layered architecture.
Routing takes place at the SNA Layer 4, called the Transmission Control layer.
Layer 4 performs flow control operations, specifically segmentation and
reassembly, and pacing.

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APPN
End Node

APPN
Network Node

APPN
End Node

Applicaton 7

7 Applicaton
6

Logical
Unit (LU)

5
Session
Connector

Transmission Control
Flow Control
-Adaptive Pacing
-Segmenting/
Reassembly

1
Connection
Oriented
Logical Link

Connection
Oriented
Logical Link
Transport Connection

Transport Connection

LU-LU Session
Application Data
APN0007A

Figure 1-7.

APPN ISR Routing Functions in SNA Architecture

Packet Segmentation and Reassembly
To maximize network performance, ISR sends the largest packet size allowable on
each network interface that you configure for APPN. Intermediate nodes, when
necessary, segment and reassemble packets of different packet sizes. The Max RU
Size for ISR Sessions parameter sets the maximum packet size for your APPN
configuration.

Adaptive Pacing
ISR’s Adaptive Pacing controls data flow and congestion by managing the number
of messages the network node receives during a session. To prevent memory
consumption, APPN uses “pacing windows” to control the maximum number of
incoming messages. During network activity, this pacing window changes
dynamically, allowing the receiving node to adjust the rate at which data flows
into its buffers.

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Configuring APPN Services

To specify the maximum size of the adaptive pacing window, configure the ISR
Receive Pacing Window parameter.

High Performance Routing
APPN’s high performance routing (HPR) increases data routing performance and
reliability. HPR allows high-speed forwarding in intermediate nodes at the Data
Link Control layer (Layer 2) of SNA, operating much faster than the intermediate
session routing (ISR) base component in APPN. HPR consumes fewer network
resources (memory and control processor) by
•

Minimizing storage and processing activities in intermediate nodes

•

Reducing the amount of error recovery on individual lines

•

Implementing nondisruptive path switching function that reroutes sessions
around failed links or nodes

HPR uses the Rapid Transport Protocol (RTP) and Automatic Network Routing
(ANR). RTP also supports adaptive rate based (ARB) congestion control.
Figure 1-8 illustrates HPR in the SNA layered architecture. Routing takes place at
the SNA Data Link Control layer. Layer 2 performs reliable, sequential delivery,
selective retransmission, and nondisruptive rerouting using RTP, as described in
this section.

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RTP Endpoint
(End Node or
Network Node)
7 Application
6

RTP Endpoint
(End Node or
Network Node)

ANR Router Node
(Network Node)
7
Logical
Unit (LU)

Application 7

Logical
Unit (LU)

Connectionless
(ANR) Routing
with Priority

Connectionless LLC

Data-Link Control
Reliable.
Sequential Delivery
Selective Retransmission
Nondisruptive Rerouting

Transport-Oriented LLC
Session
APN0008A

Figure 1-8.

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APPN HPR Routing Functions in SNA Architecture

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Configuring APPN Services

Rapid Transport Protocol
RTP is a connection-oriented, full-duplex protocol that supports data in highspeed networks at APPN NN endpoints. HPR uses RTP connections to transport
LU-LU and CP-CP traffic. A single RTP connection allows traffic from multiple
APPN sessions (requesting the same class of service) to share the same logical
“pipe.” This conserves network resources by minimizing the role of intermediate
NNs in the path, and by reducing error recovery and flow control operations.
Figure 1-9 illustrates an RTP connection supporting multiple sessions between
endpoint nodes over a logical pipe.

Multiple
Sessions

NN
Endpoint Node

RTP Connection
over Logical Pipe

NN
Intermediate Node

Multiple
Sessions

NN
Endpoint Node
APN0009A

Figure 1-9.

HPR RTP Connection Supporting APPN Sessions

RTP functions include:
•

Non-disruptive path switching

•

End-to-end error recovery

•

End-to-end flow and congestion control

Non-Disruptive Path Switching
The HPR non-disruptive path switch dynamically reroutes RTP connections
around failed links or nodes. If a path fails, the RTP component at the NN
endpoint of the logical link calculates a new path based on the desired class of
service and transmission priority (if it exists). RTP performs the switching
transparently so that the session is unaware that rerouting is taking place.
Non-disruptive path switching forwards and reverses traffic to follow different
routes through the network, and also recovers traffic that was lost at the time of
failure.

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End-to-End Error Recovery
End-to-end error recovery enables APPN NN endpoints to recovery lost traffic.
HPR endpoint NNs always perform end-to-end recovery. However, Site Manager
allows you to specify base APPN link-level error recovery, where error recovery is
done on every link, consuming more network resources.
Note: High-speed links generally have low error rates. Therefore, link-level
recovery may not be necessary in the higher speed HPR configurations.

When link level recovery is turned off and an error is detected, the packet is
discarded, resulting in a gap in the stream of bytes over the RTP connection. When
the RTP connection endpoint NN detects the gap in the incoming byte stream, it
informs the sender to begin retransmitting from the first byte after this point in the
stream. RTP supports selective retransmission of parts of the byte stream, when
the RTP endpoint requests a range of bytes for retransmission.
End-to-End Flow and Congestion Control
Operating at the NN sending and receiving endpoints of an RTP connection, HPR
uses a preventative mechanism called adaptive rate-based (ARB) congestion
control. ARB monitors, predicts, and regulates the flow of traffic into the network
as conditions change. When the network approaches congestion (increased delay,
decreased throughput), ARB reduces the input traffic rate so that a recipient
endpoint NN can adequately handle the traffic.
With multiple RTP connections over a single link, the ARB function regulates the
flow of traffic in all connections. This provides fairness to all connections.
With multiple SNA sessions over a single RTP connection, HPR’s adaptive
session-level pacing maintains fairness among the sessions. This prevents one
session from unfairly consuming network resources, compared to other sessions
on the RTP connection.

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Configuring APPN Services

Automatic Network Routing
Automatic network routing (ANR) minimizes storage and processing
requirements for routing packets through intermediate nodes. ANR functions
include:
•

Fast packet switching

•

Session transparency

•

Source routing

Fast Packet Switching
ANR operates at the Data Link Control layer of the SNA architecture. Operating
at a lower layer than APPN ISR improves packet switching performance in the
intermediate nodes. Functions typically performed at the intermediate node, such
as link-level recovery, segmentation, flow and congestion control, are performed
at the RTP connection endpoints.
Session Transparency
Intermediate nodes are not aware of the SNA sessions or the RTP connections
established across the nodes. This eliminates the need for storing routing tables
and consuming resources (memory and buffers) at the intermediate nodes.
Source Routing
ANR uses a source routing algorithm. ANR carries the routing information in the
network header of each packet. For each activated link, an ANR label is
dynamically assigned to the packet. As a packet traverses the network, each node
strips off the information it uses in the packet header before forwarding it,
allowing the next node to easily find its routing information at a fixed place in the
header. This allows faster switching through a node. Additionally, there is no
ANR restriction on the number of hops in the network.
Figure 1-10 illustrates how ANR routes packets over an APPN HPR network. The
intermediate network node strips the first routing label (A1) from the network
header before forwarding the packet on the A1 link. C5 represents the endpoint in
the last HPR node.

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RTP Connection
Sessions

NN1
Sending Endpoint Node

Sessions

NN2
Intermediate Node

A1 C5 FF

Data

NN3
Receiving Endpoint Node

C5 FF

Data

A1 Stripped off at NN2 Before Delivery to NN3
APN0010A

Figure 1-10.

HPR ANR Routing and Packet Handling Operations

APPN Services
The APPN services on the NN include:
•

Session services

•

Directory services

•

Topology and routing services

•

Configuration services

•

Management services

Session Services
Session services (SS) generates unique session identifiers, activates and
deactivates CP-CP sessions to exchange network information, and assists LUs in
initiating and activating LU-LU sessions. Session services:

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•

Invokes directory services to locate a partner LU

•

Invokes topology and routing services (TRS) to calculate the optimal route
between the origin and destination node

•

Informs management services (MS) about newly activated or deactivated
CP-CP sessions
1-19

Configuring APPN Services

Directory Services
Directory services (DS) manages the directory database and locates network
resources throughout an APPN network. To locate network resources, directory
services at each node collects resource information and maintains the information
in a local directory database. Through a CP-CP session between an APPN
network node and an adjacent APPN end node, the APPN network node registers
(by end node request) the APPN end node’s resources in its local directory
database.
An APPN network node maintains database entries for
•

Local resources (LUs and the CP)

•

End node resources within the APPN network node’s domain

•

End node or network node resources outside the APPN network node’s
domain (called cross-domain resources)

An APPN end node or low-entry networking node maintains database entries for
•

Local resources

•

Local resources on adjacent nodes that have peer-to-peer communication
sessions (without the presence of an APPN network node or control point, in
the case of a peer-to-peer end node and low-entry networking node)

Topology and Routing Services
Topology and routing services (TRS) resides in every APPN network node and, in
lesser form, in every APPN end node and low-entry networking node. In APPN
network nodes, TRS collects and exchanges information on other network nodes,
and the links between them. For LU-LU sessions, TRS provides the best route
between any two LUs. In APPN end nodes and low-entry networking nodes, TRS
collects information on links and adjacent nodes.
In APPN network nodes, TRS creates and maintains the class-of-service (COS)
database and a copy of the network topology database. The network topology
database contains information on APPN network node connections to other
network nodes and connection networks. (A connection network is a method of
defining an APPN node attachment to a shared-access transport facility, reducing
intermediate node routing and definition requirements.)

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In APPN end nodes, TRS creates and maintains the COS database, and maintains
the local topology database (also maintained by TRS at the network node). The
local topology database contains information on connections involving the local
end nodes: end node-to-end node, end node-to-network node, and end
node-to-virtual routing node.
For LU-LU sessions, TRS computes the optimal route through an APPN network
between the two nodes on which the LUs reside. A route in an APPN network is
an ordered sequence of nodes and transmission groups (TGs) that represents a
path from an origin to a destination, called a Route Selection Control Vector
(RSCV). In APPN end nodes, TRS uses the local database to select possible
transmission groups from the end node to an adjacent node. In APPN network
nodes, TRS uses the information provided by the two end nodes, together with the
information in the network node’s COS and topology database, to select a route.

Configuration Services
Configuration services (CS) manages links to adjacent APPN nodes. The APPN
node operator facility (NOF) initializes configuration services through Site
Manager.
The basic configuration functions are:
•

Node definition

•

Interfaces

•

Ports

•

Adjacent link stations

•

Connection networks

•

Directory services

Refer to Chapter 3, “Editing APPN Parameters,” for detailed information on
configuring APPN nodes.

Management Services
Management services (MS) controls and monitors the node’s resources. If an error
condition occurs, APPN receives or generates event messages about resources and
conditions. For information on the APPN event messages, refer to Event Messages
for Routers.
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Configuring APPN Services

For More Information About APPN
For more information about APPN, IBM SNA, and related subjects, refer to the
following IBM publications:

1-22

•

IBM Systems Network Architecture: LU6.2 Reference: Peer Protocols
(SC31-6808)

•

IBM Systems Network Architecture: APPN Architecture Reference
(SC30-3422)

•

IBM Systems Network Architecture: Management Services
(SC30-3346)

•

IBM APPN Architecture and Product Implementation Tutorial (GG24-3669)

•

IBM AS/400 Advanced Peer-to-Peer Networking
(GG24-3287)

•

IBM Systems Network Architecture: Technical Overview
(GC30-3073)

•

IBM Systems Network Architecture: Concepts and Products
(GC30-3072)

•

IBM System Network Architecture: Introduction to Sessions between Logical
Units (GC20-1869)

303511-A Rev 00

Chapter 2
Enabling APPN Services

This chapter describes how to enable APPN services on:
•

Logical Link Control 2 (LLC2) media, including Ethernet, token ring, and
frame relay

•

LLC2 media using Source Routing Bridge (SRB) encapsulation formats over
Ethernet, FDDI, SMDS, frame relay, and Point-to-Point Protocol(PPP)

•

Synchronous Data Link Control (SDLC) links in point-to-point and
multipoint networks

This chapter assumes that you have read Configuring and Managing Routers with
Site Manager and that you have:
1. Opened a configuration file
2. Specified router hardware if this a local mode configuration file
3. Selected the connector on which you are enabling APPN

Using the Parameter Descriptions
Each APPN parameter description provides information about default settings,
valid parameter options, the parameter function, instructions for setting the
parameter, and the Management Information Base (MIB) object ID.
The Technician Interface allows you to modify parameters by issuing set and
commit commands with the MIB object ID. This process is equivalent to
modifying parameters using Site Manager. For more information about using the
Technician Interface to access the MIB, refer to Using Technician Interface
Software.

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Configuring APPN Services

Caution: The Technician Interface does not verify that the value you enter for
a parameter is valid. Entering an invalid value can corrupt your configuration.

Enabling APPN over LLC2 Interfaces
When you configure APPN on LLC2 interfaces, such as Ethernet and token ring,
the Configuration Manager requests media access control (MAC) and service
access point (SAP) addresses. On synchronous interfaces where you are
configuring APPN over frame relay, the Configuration Manager requests a data
link connection identifier (DLCI) address and a SAP address.
To enable APPN on Ethernet, token ring, or Bay Networks synchronous interfaces
using frame relay:
1.

Select APPN from the Select Protocols window.
This menu appears after you select either a link or net module connector that
requires a wide area network (WAN) circuit. The Configuration Manager
automatically selects the LLC2 option.

Click on OK.
For frame relay and Ethernet networks, the “Use Source Route
Encapsulation?” dialog box appears (Figure 2-1).

2-2

Click on Cancel if you are configuring standard LLC over Ethernet, or if
you are configuring frame relay using the RFC 1490 routing standard.

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Enabling APPN Services

Figure 2-1.

Source Route Encapsulation Dialog Box

To configure Bay Networks SRB over Ethernet or frame relay using the RFC
1490 bridging standard, click on OK and refer to the next section, “Enabling
APPN over LLC2 Interfaces Using SRB,” for information on the additional
screens that appear.
The APPN Local Node Name Configuration window appears (Figure 2-2).

Figure 2-2.

APPN Local Node Name Configuration Window
4.

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Specify the Local Node Name parameter, as follows:

2-3

Configuring APPN Services

Parameter:
Default:

Local Node Name
None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the global network name with up to 8
characters followed by a period, and CPNAME is the control point name

with up to 8 characters. (Do not enter the angle brackets; these are a
convention used to indicate a substitutable variable.)
Function:

The Local Node Name parameter identifies the unique name of the
network and the Bay Networks router node name.

Instructions:

MIB Object ID:
5.

Enter the node name by first specifying up to 8 characters in the network
ID name, type a period, then enter a control point name with up to 8
characters. You must use uppercase characters only and the first character
must be non-numeric. Blank spaces (leading, trailing, and embedded) are
not allowed in the node name. For example, NETWORKA.SYSTEMA is
a valid entry for the Local Node Name parameter.
1.3.6.1.4.1.18.3.5.14.1.1.4

Click on OK to add the local node name.
For frame relay configurations, the APPN/FR Configuration window appears
(Figure 2-3). If you are configuring standard LLC over Ethernet, the
Configuration Manager displays the APPN Configuration window where you
specify a MAC address instead of the DLCI address.

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Enabling APPN Services

Figure 2-3.

APPN/FR Configuration Window
6.

Specify the DLCI Address (for frame relay only), MAC Address, and
SAP parameters, as follows:

Parameter:

DLCI Address

Default:

None

Options:

Valid range depends on the frame relay address length as follows:

Function:
Instructions:
MIB Object ID:

303511-A Rev 00

Address Length

Range

2 bytes

16-1007

3 bytes

1024-64511

4 bytes

131072-8257535

The DLCI is the frame relay PVC identification number. The frame relay
network uses the DLCI to direct basic data flow.
Enter a decimal number within the valid range.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

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Configuring APPN Services

Parameter:

SAP (hex)

Default:

None

Options:

Any unique SAP 2-digit hexadecimal value, usually 04 with APPN.

Function:

Specifies a SAP address that lets multiple applications and protocol
entities in a single computer share a MAC address.

Instructions:
MIB Object ID:

Parameter:

Enter a 2-digit hexadecimal value.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

MAC Address

Default:

None

Options:

Any unique 48-bit 12-digit hexadecimal MAC-level address

Function:

Specifies a unique MAC-level address for this port.

Instructions:
MIB Object ID:
7.

Enter a 12-digit hexadecimal MAC-level address in most significant bit
(MSB) noncanonical format, regardless of the media.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

Click on OK.
The Adjacent Link Station dialog box appears (Figure 2-4).

Figure 2-4.

2-6

Adjacent Link Station Dialog Box

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Enabling APPN Services
8.

Click on OK to configure APPN adjacent link station parameters now.
For information on configuring addjacent link stations, go to the section in
Chapter 3 entitled “Editing APPN Adjacent Link Stations.”

Click on Cancel.
Go to Chapter 3for information about configuring APPN.

Enabling APPN over LLC2 Interfaces Using SRB
If you are configuring LLC2 interfaces such as Ethernet, FDDI, SMDS, frame
relay, and PPP, you can use SRB encapsulation formats. For Ethernet (Bay
Networks proprietary SRB over Ethernet) and frame relay (RFC1490 Bridging
Standard), start at the Source Route Encapsulation dialog box (Figure 2-5) and
proceed as follows:

Figure 2-5.
1.

Source Route Encapsulation Dialog Box

Click on OK.
The Source Routing Global Parameters window appears (Figure 2-6).

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Configuring APPN Services

Figure 2-6.

Source Routing Global Parameters Window
2.

Edit the SR Bridge Internal LAN ID and the SR Bridge ID parameters in
the Source Routing Global Parameters window.
These are mandatory parameters that you must specify before you can
proceed.

2-8

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Enabling APPN Services

Parameter:

SR Bridge Internal LAN ID

Default:

0x1

Range:

0x1 to 0x0fff

Function:

Specifies this bridge’s internal LAN ID.

Instructions:
MIB Object ID:

1.3.6.1.4.1.18.3.5.1.1.2.1.4

Parameter:

SR Bridge ID

Default:

0x1

Range:

0x1 to 0x0f

Function:

Specifies this bridge’s ID and identifies the Bay Networks source routing
bridges in the network.

Instructions:

MIB Object ID:

Assign an internal LAN ID that is unique among all other internal LAN
IDs and ring IDs in the network.

Assign the same value to all Bay Networks source routing bridges in the
network (unless two bridges operate in parallel). The SR bridge ID must
be unique among any other third-party bridge IDs in the network.
1.3.6.1.4.1.18.3.5.1.1.2.1.5

For details about configuring the source routing parameters on this window, refer
to Configuring Bridging Services.
3.

Click on OK.
The Edit SR Interface window appears (Figure 2-7).

303511-A Rev 00

2-9

Configuring APPN Services

Figure 2-7.

Edit SR Interface Window
4.

Edit the Source Routing Ring Number parameter in the Edit SR
Interface window.
This is the only parameter that you must specify before you can proceed.

2-10

303511-A Rev 00

Enabling APPN Services

Parameter:

Source Routing Ring Number

Default:

0x0

Range:

0x0 to 0x0fff

Function:

Identifies the ring number (ring ID) of this source routing circuit.

Instructions:

MIB Object ID:

Assign a ring number (ring ID) to this source routing circuit that is unique
among any other ring IDs, group LAN IDs, or internal LAN IDs in the
network.
1.3.6.1.4.1.18.3.5.1.1.2.1.6

For details on how to configure the source routing parameters on this window,
refer to Configuring Bridging Services.
5.

Click on OK.
The APPN Virtual Ring Number Configuration window appears (Figure 2-8).

Figure 2-8.

APPN Virtual Ring Number Configuration Window
6.

303511-A Rev 00

Edit the Virtual Ring Number parameter, as follows:

2-11

Configuring APPN Services

Parameter:
Default:

None

Range:

1 to 4095

Function:

Specifies the unique SRB ring number to be used by APPN. It must be
unique in the SRB network. This means that the Virtual Ring Number
must be different not only from the ring IDs specified in the SRB
configuration, but different also from other Bay Networks routers running
APPN on LLC2/SRB media.

Instructions:
MIB Object ID:
7.

Virtual Ring Number (hex)

Specify the unique LLC ring number in the range 1 to 4095.
1.3.6.1.4.1.18.3.5.1.6.2.25

Click on OK.
If this is the first interface for which you are configuring APPN, the APPN
Local Node Name Configuration window appears (Figure 2-2). If this is not
the first interface for which you are configuring APPN, the APPN
Configuration window for your specific network appears. Refer to these
figures and the steps that follow them to complete the APPN configuration.

Enabling APPN Interfaces over SDLC
To configure APPN on synchronous interfaces (COM1, COM2, etc.) using the
SDLC protocol:
1.

Select SDLC from the WAN protocols window.
The Configuration Manager displays the SDLC Line Parameters window
(Figure 2-9).

2-12

303511-A Rev 00

Enabling APPN Services

Figure 2-9.

SDLC Line Parameters Window
2.

303511-A Rev 00

Edit the Clock Source, Internal Clock Speed, Sync Line Coding, Cable
Type, and RTS Enable parameters, as follows:

2-13

Configuring APPN Services

Parameter:

Clock Source

Default:

Internal

Options:

External | Internal

Function:

Identifies whether the router provides clocking (INTERNAL) or receives
clocking (EXTERNAL) from the other device. The parameter specifies
the origin of the synchronous timing signals. If you set this parameter to
Internal, this router supplies the required timing signals. If you set this
parameter to External, an external network device supplies the required
timing signals.
Use this parameter when connecting the SNA equipment directly to the
router. Either the router or the SNA equipment can define the speed of the
SDLC link. You must configure one device to internal clocking, and the
other device to external clocking.

Instructions:

MIB Object ID:

2-14

For direct connection to a control unit, such as an IBM 3174, set to
Internal. For connection to a modem, set to External. For direct
connection to an IBM 3745, either the router or the IBM 3745 can provide
the clock source. If the IBM 3745 does not provide clocking, set to
Internal.
1.3.6.1.4.1.18.3.4.5.1.13

303511-A Rev 00

Enabling APPN Services

Parameter:

Internal Clock Speed

Default:

19200 KB

Options:

1200 B| 2400 B | 4800 B | 7200 B | 9600 B |
19200 B | 32000 B | 38400 B | 56 KB | 64 KB |
125 KB | 230 KB| 420 KB | 625 KB | 833 KB |
1.25 MB | 2.5 MB | 5 MB

Function:

Instructions:

Sets the clock speed of an internally supplied clock when Clock Source is
set to Internal. Attached devices must be capable of operating at the
specified speed. Some of the more common allowed speeds for IBM
products are as follows:
--

An IBM 3274 with an V.24/RS-232 interface supports up to 9600 bps.
Some support speeds up to 19200 bps.

An IBM 3274 with a V.35 interface supports up to 64 Kb/s.

An IBM 3174 with a V.24/RS-232 interface supports up to 19200 bps.

An IBM 3174 with a V.35 interface and running Licensed Internal
Code-C supports up to 256 Kb/s.

Click on Values and set the clock speed for the internal clock to the
desired data transmission rate across the synchronous line.
This parameter is unavailable when Clock Source is set to External.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.4.5.1.14

2-15

Configuring APPN Services

Parameter:

Sync Line Coding

Default:

NRZ

Options:

NRZ | NRZI | NRZI Mark

Function:

Sets the same line coding value for all devices attached to the same SDLC
link. You can change the value of this parameter to match the line coding
of a device at the other end of the line.
This parameter is relevant only for the AN and ASN routers, and the Octal
Sync module. Other Bay Networks router platforms use NRZ encoding.
NRZ -- Indicates Non-Return to Zero encoding.
NRZI -- Indicates Non-Return to Zero Inverted encoding.
NRZI Mark -- Indicates Non-Return to Zero Inverted Mark encoding.

Instructions:
MIB Object ID:

Parameter:

1.3.6.1.4.1.18.3.4.5.1.88

Cable Type

Default:

RS232

Options:

Null | RS232 | RS422 | V35 | X21

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies the cable interface to the network.
Click on Values and select the installed cable interface type.
1.3.6.1.4.1.18.3.4.5.1.83

RTS Enable

Default:

Disable

Options:

Enable | Disable

Function:
Instructions:

MIB Object ID:
2-16

Select NRZ or NRZI. NRZI Mark is not generally used for SDLC.

Controls the toggling of the Request to Send (RTS) signal on the
interface.
Click on Values and select Enabled or Disabled. For manual dial modems
(2-wire), set this parameter to Enabled. For leased modems (4-wire), set
this parameter to Disabled.
1.3.6.1.4.1.18.3.4.5.1.16
303511-A Rev 00

Enabling APPN Services
3.

Click on OK.
The Select Protocols window appears (Figure 2-10).

Figure 2-10.
4.

Select Protocols Window

Select APPN and click on OK.
If this is the first interface for which you are configuring APPN, the APPN
Local Node Name Configuration window appears (Figure 2-11). Otherwise,
the APPN SDLC Address Configuration window appears (Figure 2-12).

Figure 2-11.

APPN Local Node Name Configuration Window
5.

303511-A Rev 00

Specify the Local Node Name parameter.

2-17

Configuring APPN Services

If this is not the first APPN interface on this router, omit this step and go to
Step 7.

Parameter:

Local Node Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the global network name with up to 8
characters followed by a period, and CPNAME is the control point name
with up to 8 characters. (Do not enter the angle brackets; these are a
convention used to indicate a substitutable variable.)

Function:

The Local Node Name parameter identifies the unique name of the
network and the Bay Networks router node name.

Instructions:

MIB Object ID:
6.

Enter the node name by first specifying up to 8 characters in the network
ID name; type a period; and then enter a control point name with up to 8
characters. You must use uppercase characters only and the first character
must be non-numeric. Blank spaces (leading, trailing, and embedded) are
not allowed in the node name. For example, NETWORKA.SYSTEMA is
a valid entry for the Local Node Name parameter.
1.3.6.1.4.1.18.3.5.14.1.1.4

Click on OK to add the local node name.
The APPN SDLC Address Configuration window appears (Figure 2-12).

Figure 2-12.
2-18

APPN SDLC Address Configuration Window
303511-A Rev 00

Enabling APPN Services
7.

Specify the SDLC address for the interface, as follows:

Parameter:

SDLC Address (hex)

Default:

None

Options:

Any unique 2-digit hexadecimal SDLC-level address

Function:

Specifies a unique SDLC address for this circuit.

Instructions:
MIB Object ID:
8.

Enter a 2-digit hexadecimal address.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

Click on OK.
The Adjacent Link Station dialog box appears (Figure 2-13).

Figure 2-13.

Adjacent Link Station Dialog Box

To configure APPN adjacent link station parameters now, go to the section in
Chapter 3 entitled “Editing APPN Adjacent Link Stations.”
9.

Click on Cancel.
Go to the beginning of Chapter 3 for information about configuring APPN.

303511-A Rev 00

2-19

Chapter 3
Editing APPN Parameters

Once you successfully enable an APPN interface on the router, you can edit
parameters and customize APPN services.
This chapter describes how to use the Configuration Manager to edit the following
parameters:
•

Global and advanced

•

Interface and port

•

Adjacent link station

•

Connection network

•

Directory services

The instructions assume you have already added one or more interfaces to a router
configuration file that you now want to edit for APPN. (Refer to Configuring and
Managing Routers with Site Manager to learn how to add interfaces to the
configuration file.)

3-1

Configuring APPN Services

Caution: The Technician Interface does not verify that the value you enter for
a parameter is valid. Entering an invalid value can corrupt your configuration.

Accessing APPN Parameters
You can access all APPN operational parameters from the Configuration Manager
window (Figure 3-1). (Refer to Configuring and Managing Routers with Site
Manager for instructions about how to access this window.)

Figure 3-1.

3-2

Configuration Manager Window

303511-A Rev 00

Editing APPN Parameters

Editing APPN Global Parameters
To edit APPN global parameters from Configuration Manager window
(Figure 3-1) and proceed as follows
1.

Select Protocols > APPN > Global.
The Edit APPN Global Parameters window appears (Figure 3-2).

Edit the parameters you want to change.
Use the descriptions that follow as a guide.

Figure 3-2.

303511-A Rev 00

Click on OK to save your changes and exit the window, or select
Advanced to further customize APPN global parameter settings.

Edit APPN Global Parameters Window

3-3

Configuring APPN Services

Parameter:

APPN Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Globally enables or disables APPN on the router.
Disable -- Forces every APPN interface existing on the node into the
“down” (inoperative) state.
Enable -- Reinitializes every APPN interface existing on the node; each
interface maintains the most recent setting of its own Interface Enable/
Disable parameter.

Instructions:

Select Disable to force every APPN interface existing on the node into the
“down” (inoperative) state.
Select Enable to globally reinitialize all APPN interfaces configured on
the node; each interface will maintain the most recent setting of its own
Interface Enable/Disable parameter.

MIB Object ID:

Parameter:

Local Node Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the global network name with up to 8
characters followed by a period, and CPNAME is the control point name
with up to 8 characters

Function:
Instructions:

MIB Object ID:

3-4

1.3.6.1.4.1.18.3.5.14.1.1.2

The Local Node Name parameter identifies the unique name of the
network and the Bay Networks router node name.
Specify up to 8 characters for the network ID name; follow with a period;
then type a control point name with up to 8 characters. You must use
uppercase characters only and the first character must be non-numeric.
Blank spaces (leading, trailing, and embedded) are not allowed in the
node name. For example, NETWORKA.SYSTEMA is a valid entry for
the Local Node Name parameter.
1.3.6.1.4.1.18.3.5.14.1.1.4

303511-A Rev 00

Editing APPN Parameters

Parameter:

Local ID Block

Default:

None

Options:

A valid string of 3 hexadecimal digits

Function:

A unique hexadecimal value identifies the APPN product in this NN. The
number is the first 3 digits of the node identification.

Instructions:
MIB Object ID:

Accept the displayed value or enter 3 hexadecimal digits in this field.
1.3.6.1.4.1.18.3.5.14.1.1.6

Parameter:

Local ID Number

Default:

None

Options:

A valid string of 5 hexadecimal digits (0 to 9, A,B,C,D,E,F)

Function:

Identifies the local APPN network node and is present in APPN alerts and
exchange identifications (XIDs). These 5 digits are combined with the
3-digit local ID block to form a unique XID node identification. The
APPN network node and the adjacent node exchange node identifications
when establishing a connection.

Instructions:
MIB Object ID:

Enter 5 hexadecimal digits.
1.3.6.1.4.1.18.3.5.14.1.1.7

APPN Global Advanced Parameters
To edit the APPN global advanced parameters from the Edit APPN Global
Parameters window (Figure 3-2):
1.

Click on Advanced.
The Advanced APPN Global Parameters window appears (Figure 3-3). This
window contains general parameters associated with APPN directory
services, intermediate session routing, and topology and routing services.

303511-A Rev 00

3-5

Configuring APPN Services

Figure 3-3.

Advanced APPN Global Parameters Window
2.

Click on each parameter value that you want to change; then edit the
displayed value.
Use the parameter descriptions that follow as a guide.

3-6

Click on OK to save your changes and exit the window.

303511-A Rev 00

Editing APPN Parameters

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

Parameter:

Route Addition Resistance
128
0 to 255
Indicates the relative desirability of using this network node for
intermediate session routing (ISR) when multiple paths exist.
Enter a value in the range 0 to 255. The lower the value, the more
desirable the node becomes for ISR.
1.3.6.1.4.1.18.3.5.14.1.1.21

Endpoint Session RSCV Storage

Default:

Enable

Options:

Enable | Disable

Function:

When enabled, stores route selection control vector information used by
the network node if it is the endpoint (origin or destination) node in the
route. This parameter is useful when you are using the Technician
Interface to debug logged APPN events and statistics. Refer to Using
Technician Interface Scripts for information on using the show appn
command.
When enabled, this parameter consumes additional memory for each
endpoint session.

Instructions:
MIB Object ID:

303511-A Rev 00

Select Enable to enable endpoint session RSCV storage. Select Disable to
disable endpoint session RSCV storage.
1.3.6.1.4.1.18.3.5.14.1.1.29

3-7

Configuring APPN Services

Parameter:
Default:

Options:

A value of 0 indicates an unlimited number of entries; otherwise, any
positive numeric value

Function:

Specifies the maximum number of entries that APPN stores in the
directory database at the network node. The directory database stores
information about network resources and their location in the APPN
network.

Instructions:
MIB Object ID:

Parameter:

Enter a value large enough for the network being managed, or specify 0
for unlimited entries.
1.3.6.1.4.1.18.3.5.14.1.1.32

Max Cached Directory Entries

Default:

100

Options:

Any positive numeric value

Function:

Instructions:

MIB Object ID:

3-8

Max Directory Entries

Specifies the maximum number of cached directory entries that APPN
stores in the local directory database at any one time. The caching can
ultimately result in large local directory databases that may include
out-of-date resource entries. If the maximum number is reached and if all
entries are in use, new entries to be cached will replace the oldest cache
entries.
Enter a value large enough for the network being managed. Increase the
current value if the oldest valid entries are being replaced on a regular
basis.
1.3.6.1.4.1.18.3.5.14.1.1.31

303511-A Rev 00

Editing APPN Parameters

Parameter:

Network Locate Timeout (in seconds)

Default:

Options:

Specify 0 to indicate no timeouts

Function:

Specifies the length of time (in seconds) before a network search times
out. The network search function locates network resources and controls
the flow of search requests and replies throughout the network.

Instructions:

Enter a positive time value in seconds. If directory services at the local
network node does not receive a search response at the completion of this
timeout value, the search is terminated. When the local network node
receives the search response, the search is complete.

MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.1.33

TRS Route Tree Cache Size
8
8 through 2147483674
Specifies the size of the topology and routing services (TRS) tree
database. The tree database allows a network node to cache optimal routes
from the local APPN node to other network nodes (tree caching).
Enter a positive numeric value in the range 8 to 2147483674 to indicate
the maximum number of routing trees to be stored in the database.
1.3.6.1.4.1.18.3.5.14.1.1.34

TRS Route Tree Cache Usage Limit
8
1 through 2147483674
Specifies the maximum number of times a route tree will be used before
route selection services (RSS) calculates a new route tree for that class of
service (COS).
Enter any positive numeric value in the range 1 to 2147483674.
1.3.6.1.4.1.18.3.5.14.1.1.35

3-9

Configuring APPN Services

Parameter:
Default:

Options:

Any positive number; specify 0 to indicate an unlimited number of
network nodes

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies the maximum number of network nodes (routers) in the network
topology database.
Specify 0 to include all network nodes.
1.3.6.1.4.1.18.3.5.14.1.1.36

Max TGs in Topology DB (0 = unlimited)

Default:

Options:

Any valid positive number; specify 0 to indicate an unlimited number of
transmission groups (TGs)

Function:

Specifies the maximum number of TGs in the network topology database.
A TG represents a single unidirectional connection (or link) to an adjacent
link station.

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

3-10

Max NNs in Topology DB (0 = unlimited)

Specify 0 to include all TGs.
1.3.6.1.4.1.18.3.5.14.1.1.37

Max Number of ISR Sessions
1000
100 through 2147483674
Specifies the maximum number of intermediate session routing (ISR)
sessions that the local network node can support concurrently.
Enter a value of 100 through 2147483674.
1.3.6.1.4.1.18.3.5.14.1.1.38

303511-A Rev 00

Editing APPN Parameters

Parameter:

ISR Congestion Threshold

Default:

900

Options:

Any positive numeric value less than the Max Number of ISR Sessions
parameter setting

Function:

Specifies the maximum number of ISR sessions before the node considers
itself congested, causing it to direct new sessions away. A network node is
no longer congested when the number of ISR sessions drops to the setting
of the ISR Decongestion Threshold parameter.

Instructions:

Enter any positive numeric value less than the setting for the Max Number
of ISR Sessions parameter. In most cases, a value equal to 90% of the
Max Number of ISR Sessions parameter is a reasonable value.

MIB Object ID:

Parameter:

1.3.6.1.4.1.18.3.5.14.1.1.39

ISR Decongestion Threshold

Default:

800

Options:

Any positive numeric value less than the ISR Congestion Threshold
parameter setting

Function:

Instructions:

MIB Object ID:

303511-A Rev 00

Specifies the number of active ISR sessions that the local network node
must drop to before it is no longer congested. A network node is
congested when the number of ISR sessions reaches the ISR congestion
threshold.
Enter any positive numeric value that is less than the current ISR
Congestion Threshold parameter setting. In most cases, a value equal to
80% of the Max Number of ISR Sessions parameter is a reasonable value.
1.3.6.1.4.1.18.3.5.14.1.1.40

3-11

Configuring APPN Services

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

Parameter:
Default:
Range:

Max RU Size for ISR Sessions
4096
256 to 4096, inclusive
Specifies the maximum request unit (RU) size for the segmentation and
reassembly of session and nonsession traffic during the ISR sessions.
Enter a positive number in the range 256 to 4096.
1.3.6.1.4.1.18.3.5.14.1.1.41

ISR Receive Pacing Window
7
1 to 63, inclusive

Function:

Specifies the maximum number of messages that the network node can
receive in one window during an ISR session. Pacing windows control the
number of messages to prevent memory consumption.

Instructions:

Enter a positive number in the range 1 to 63. Entering higher values may
improve performance, but will consume more memory.

MIB Object ID:

Parameter:

1.3.6.1.4.1.18.3.5.14.1.1.42

ISR Session RSCV Storage

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables the storage of route selection control vectors (RSCVs)
during ISR sessions. This parameter is useful for debugging. When
enabled, it consumes additional memory for each ISR session.
The intermediate network node uses RSCV information to obtain the next
node and a transmission group (TG) to the node along a route. The
maximum number of APPN nodes and TGs a session can traverse is
limited to the size of the RSCV.

Instructions:
MIB Object ID:

3-12

Select Enable to enable ISR session RSCV storage. Select Disable to
disable ISR session RSCV storage.
1.3.6.1.4.1.18.3.5.14.1.1.43

303511-A Rev 00

Editing APPN Parameters

Parameter:

DLUR Support Enable/Disable

Default:

Disable

Options:

Enable | Disable

Function:

Enables or disables Dependent Logical Unit Requester (DLUR) support
at the network node. DLUR is an APPN component that allows dependent
logical units (LU type 0,1,2,3 and dependent LU6.2) within APPN.

Instructions:

Click on Values and select Enable to start DLUR at the network node, or
select Disable to stop DLUR at the network node.

MIB Object ID:

Parameter:

1.3.6.1.4.1.18.3.5.14.1.1.45

Default DLUS Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with
up to 8 characters

Function:

Specifies the fully qualified default name of the DLUS node that serves
the PU2.0 adjacencies configured on this node. APPN uses the default
name when the DLUR Support Enable/Disable parameter is set to Enable,
and when the DLUR Implicit LS Support parameter is set to Enable for
implicit link stations on the port.

Instructions:

If the DLUR Support Enable/Disable parameter is set to Enable, type up
to 8 characters for the network ID; follow with a period, and then type a
control point name with up to 8 characters. You must use uppercase
characters only and the first character must be non-numeric. Blank spaces
(leading, trailing, and embedded) are not allowed in the node name. For
example, APPNNODE.DLUR is a valid entry for this parameter.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.1.54

3-13

Configuring APPN Services

Parameter:
Default:
Options:

Default Backup DLUS Name
None
Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with

up to 8 characters
Function:

Specifies the fully qualified default backup name of the DLUS node that
serves PU2.0 adjacencies configured on this node. APPN uses the default
backup name when the DLUR Support Enable/Disable parameter is set to
Enable, and when the DLUR Implicit LS Support parameter is set to
Enable for implicit link stations on the port.

Instructions:

If the DLUR Support Enable/Disable parameter is set to Enable, type up
to 8 characters for the network ID name; follow with a period, and then
type a control point name with up to 8 characters. You must use uppercase
characters only and the first character must be non-numeric. Blank spaces
(leading, trailing, and embedded) are not allowed in the node name. For
example, APPNNODE.DLUR is a valid entry for this parameter.

MIB Object ID:

Parameter:

DLUR-DLUS RSCV Storage

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables the storage of route selection control vectors (RSCVs)
during DLUR/DLUS sessions. This parameter is useful for network
monitoring and debugging. When enabled, it will consume additional
memory for each DLUR/DLUS session. It is not used if the DLUR
Support Enable/Disable parameter is set to Disable.

Instructions:

Click on Values and select Enable to enable DLUR-DLUS RSCV storage.
Select Disable to disable DLUR-DLUS RSCV storage.

MIB Object ID:

3-14

1.3.6.1.4.1.18.3.5.14.1.1.55

1.3.6.1.4.1.18.3.5.14.1.1.44

303511-A Rev 00

Editing APPN Parameters

Parameter:

HPR Support

Default:

Enable

Options:

Enable | Disable

Function:

Enables HPR on this node.

Instructions:
MIB Object ID:

Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.1.50

Parameter:

HPR Path Switch Controller Support

Default:

Disable

Options:

Enable | Disable

Function:

Enables this node as an HPR patch switch controller/initiator. This
parameter is available when the HPR Support parameter is set to Enable.
Typically, you only set this parameter to Enable if your network node is a
mobile or wireless (satellite communications) partner. The Enable setting
prevents unneeded path switch attempts by the nonmobile partner.

Instructions:
MIB Object ID:

Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.1.51

Editing APPN lnterfaces and Ports
To edit APPN Interface parameters, begin at the Configuration Manager window
(refer to Figure 3-1) and proceed as follows:
1.

Select Protocols > APPN > Interfaces.
The APPN Interface List window appears (Figure 3-4).

303511-A Rev 00

Edit those parameters you want to change, using the APPN configuration
windows that appear.

3-15

Configuring APPN Services

Figure 3-4.

APPN Interface List Window
3.

Click on Apply to save your changes.

Click on Done to exit the window.
To display and enable (or disable) the current port(s) on an interface, add
additional ports to the interface, delete ports, or edit advanced port
parameters, click on Ports.

3-16

303511-A Rev 00

Editing APPN Parameters

Parameter:

Interface Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables APPN routing on this interface.
Enable -- Initializes the selected APPN interface. You can also use the
Enable setting to initialize an existing APPN interface that you disabled
earlier.
Disable -- Forces the APPN interface into the “down” (inoperative) state.

Instructions:

Select Disable to disable APPN routing over this interface.
Select Enable to enable or reenable APPN routing over this interface.

MIB Object ID:

1.3.6.1.4.1.18.3.5.14.1.2.1.2

Deleting APPN Interfaces
To delete an interface from the APPN Interface List window (refer to Figure 3-4),
select the interface, then click on Delete. The system software deletes the interface
entry from the APPN configuration.

Editing APPN Ports
The APPN Interface List window (refer to Figure 3-4) allows you to enable or
disable APPN ports, add and delete APPN ports on existing interfaces, and edit
advanced port parameters. From the APPN Interface List window,
1.

Select Ports.
The APPN Port List window appears (Figure 3-5).

Highlight the port you want to modify.
The parameter values associated with that interface appear in the parameters
window and change dynamically with each port that you select.

303511-A Rev 00

Click on Apply to save your changes.

3-17

Configuring APPN Services

Figure 3-5.
4.

APPN Port List Window

Click on Done to exit the window.

Parameter:

Port Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables APPN routing on this port.
Enable -- Initializes the selected APPN port. You can also use the Enable
setting to initialize an existing APPN port that you disabled earlier.
Disable -- Forces the APPN port into the “down” (inoperative) state.

Instructions:

Select Disable to disable APPN routing over this port.
Select Enable to enable or reenable APPN routing over this port.

MIB Object ID:
3-18

1.3.6.1.4.1.18.3.5.14.1.3.1.2
303511-A Rev 00

Editing APPN Parameters

Parameter:

Port Address

Default:

None

Options:

None

Function:
Instructions:

MIB Object ID:

Parameter:

Specifies the interface address for this port.
This is the MAC address, SDLC address, or DLCI and SAP address that
you specified when you added the original circuit to the interface. A MAC
address starts with the 0x prefix and ends with the SAP value.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

Local Link Station Role

Default:

Negotiable

Options:

Negotiable | Primary | Secondary

Function:

Specifies the initial role of the local network node when activating
adjacent link stations through this port. Negotiable means that the local
network node can be either primary or secondary and the actual role is
determined during link activation. A link between the two nodes may
require that one link station takes the role of primary link station and one
link station takes the role of secondary link station.

Instructions:

Click on Values to display the options and select Negotiable, Primary, or
Secondary.

MIB Object ID:

1.3.6.1.4.1.18.3.5.14.1.3.1.8

Deleting APPN Ports
To delete a port from an interface on the APPN Port List window (refer to
Figure 3-5), select the port, then click on Delete. The system software deletes the
entry from the APPN configuration.

303511-A Rev 00

3-19

Configuring APPN Services

Adding Ports to an APPN Interface
To add a port to an APPN interface, display the APPN Port List window
(Figure 3-5) and proceed as follows:
1.

Click on Add.
The APPN Port Configuration or the APPN/FR Port Configuration window
appears (Figure 3-6).

Figure 3-6.

APPN/FR Port Configuration Window
2.

Enter values for the Port Name, Port Number, Port MAC Address or Port
DLCI Address, Port SAP, and Local Link Station Role parameters.
If you are configuring SDLC, the SDLC Address parameter appears instead of
the Port MAC Address parameter. If you are configuring frame relay on an
LLC2 interface, the Port DLCI Address parameter appears.

Click on OK to save your entries to the configuration file.
The APPN Port List window (refer to Figure 3-5) reappears.

3-20

303511-A Rev 00

Editing APPN Parameters

Parameter:

Port Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters

Function:

Specifies the name of the newly added port.

Instructions:
MIB Object ID:

Parameter:

Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.3.1.15

Port Number

Default:

None

Options:

Any unique 3-digit number

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies a unique number to identify this port, if more than one port is
configured on an interface.
Enter any 3-digit value.
1.3.6.1.4.1.18.3.5.14.1.3.1.16

Port DLCI Address

Default:

None

Options:

Valid range changes based on the frame relay address length as follows:

Function:
Instructions:
MIB Object ID:

303511-A Rev 00

Address Length

Range

2 bytes

16-1007

3 bytes

1024-64511

4 bytes

131072-8257535

The DLCI is the frame relay PVC identification number. The frame relay
network uses the DLCI to direct basic data flow.
Enter a decimal number within the valid range.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

3-21

Configuring APPN Services

Parameter:
Default:

None

Options:

Any unique 48-bit, 12-digit hexadecimal MAC-level address

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies a unique MAC-level address, DLCI (for frame relay), or SDLC
address.
Enter a 12-digit MAC hexadecimal address in MSB non-canonical form
(regardless of the media), a DLCI address, or an SDLC address.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

Port SAP (hex)

Default:

None

Options:

Any unique SAP 2-digit hexadecimal value, usually 04

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies a SAP address that lets multiple applications and protocol
entities in a single computer share a MAC address.
Enter a 2-digit hexadecimal value.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

SDLC Address (hex)

Default:

None

Options:

Any unique 2-digit hexadecimal SDLC-level address

Function:
Instructions:
MIB Object ID:

3-22

Port MAC Address

Specifies a unique SDLC address for this circuit.
Enter a 2-digit hexadecimal address.
1.3.6.1.4.1.18.3.5.14.1.3.1.38

303511-A Rev 00

Editing APPN Parameters

Parameter:

Local Link Station Role

Default:

Negotiable

Options:

Negotiable | Primary | Secondary

Function:

Specifies the initial role of the local network node when activating
adjacent link stations through this port.
Negotiable means that the local network node can be either primary or
secondary and the actual role is determined during link activation. A link
between the two nodes may require one link station to take the role of
primary link station and the other link station to take the role of secondary
link station.

Instructions:
MIB Object ID:

Click on Values to display the options and select Negotiable, Primary, or
Secondary.
1.3.6.1.4.1.18.3.5.14.1.3.1.8

Editing APPN Advanced Port Parameters
To edit the APPN advanced port parameters, display the APPN Port List window
(refer to Figure 3-5) and
1.

Click on Advanced.
The APPN Port window appears (Figure 3-7).

303511-A Rev 00

3-23

Configuring APPN Services

Figure 3-7.

3-24

APPN Port Window
2.

Click on each parameter value that you want to change, then enter a new
value.

Click on OK to save your changes and return to the APPN Port List
window (Figure 3-5).

303511-A Rev 00

Editing APPN Parameters

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:

Max Receive BTU Size
2057
256 to 4105
Specifies the maximum Basic Transmission Unit (BTU) size that this
network node can receive. Each link station determines its own maximum
BTU size based on local node definitions and exchange identification
(XID) information received from the interface and the adjacent link
station.
Enter a number in the range 256 to 4105 that the node can handle. The
minimum setting for HPR links is 768.
1.3.6.1.4.1.18.3.5.14.1.3.1.9

Max Send BTU Size
2057
256 to 4105

Function:

Specifies the maximum Basic Transmission Unit (BTU) size that can be
sent over this port. Each link station determines its own maximum send
BTU size based on local node definitions and exchange identification
(XID) information received from the interface and the adjacent link
station.

Instructions:

Enter a number in the range 256 to 4105. For Ethernet networks, the
maximum send BTU size should be less than or equal to 1500. For
synchronous media, the maximum send BTU size should be less than or
equal to the synchronous maximum transmission unit. The minimum
setting for HPR links is 768.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.3.1.24

3-25

Configuring APPN Services

Parameter:
Default:

Options:

A numeric value not exceeding 127

Function:
Instructions:
MIB Object ID:

Parameter:
Default:
Range:

Specifies the maximum number of information frames (I-frames) that the
local network node can receive before it sends an acknowledgment.
Enter a number in the range 1 to 127.
1.3.6.1.4.1.18.3.5.14.1.3.1.10

Total Link Activation Limits
1
0 to 256; see Table 3-1

Function:

Specifies the link activation limit for this port. The value is the maximum
number of inbound and outbound link stations that the port will allow in
this configuration. The maximum value depends on the setting of the
Local Link Station Role parameter and the type of port, as listed in Table
3-1.

Instructions:

Specify a value in the range 0 to 256. The value must be greater than or
equal to the combined settings for the Inbound Link Activation Limits and
Outbound Link Activation Limits parameters.

MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:

MIB Object ID:

3-26

Max I-Frame Window

1.3.6.1.4.1.18.3.5.14.1.3.1.17

Inbound Link Activation Limits
0
0 to 256; see Table 3-1
Specifies the inbound link activation limit for this port. The value is the
maximum number of inbound link stations that the port will allow in this
configuration.
Specify a value in the range 0 to 256. This value plus the current setting
for the Outbound Link Activation Limits parameter must be less than or
equal to the current Total Link Activation Limits parameter setting.
1.3.6.1.4.1.18.3.5.14.1.3.1.18

303511-A Rev 00

Editing APPN Parameters

Parameter:
Default:
Range:
Function:

Instructions:

MIB Object ID:

Outbound Link Activation Limits
0
0 to 256; see Table 3-1
Specifies the maximum outbound link activation limit for this port. The
value is the maximum number of outbound link stations that the port will
allow in this configuration.
Specify a value in the range 0 to 255. This value plus the current setting
for the Inbound Link Activation Limits parameter must be less than or
equal to the Total Link Activation Limits parameter setting.
1.3.6.1.4.1.18.3.5.14.1.3.1.19

Table 3-1.

303511-A Rev 00

Link Activation Limit Default Values

Inbound Link
Activation
Limits

Outbound
Link
Activation
Limits

Port Type

Local Link
Station Role

Total Link
Activation
Limit

Leased

Secondary

Leased

Negotiable

Leased

Primary

256

SATF

any

256(x+y)

128(x)

128(y)

3-27

Configuring APPN Services

Parameter:
Default:

Yes

Options:

Yes | No

Function:

Instructions:
MIB Object ID:

Parameter:

Specifies whether CP-to-CP sessions are permitted for dynamic link
stations. Dynamic link stations are link stations that are not defined on
this port, but are activated by the adjacent node.
Click on Values and select Yes or No.
1.3.6.1.4.1.18.3.5.14.1.3.1.25

Implicit Limited Resource

Default:

Options:

Yes | No

Function:

Instructions:
MIB Object ID:

3-28

Implicit CP Sessions

Specifies whether dynamic link stations on this port should be defined as
limited resources. A limited resource link station deactivates after the
number of sessions using the port drops to zero.
Click on Values and select Yes or No.
1.3.6.1.4.1.18.3.5.14.1.3.1.26

303511-A Rev 00

Editing APPN Parameters

Parameter:

Implicit Effective Capacity

Default:

16M

Options:

1200
2400
4800
7200
9600
14400
19200
48000
56000
64000
4M
10M
16M
Maximum

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

303511-A Rev 00

The Effective Capacity is the highest bit-transmission rate that the TG can
obtain before being considered overloaded. The link bandwidth and
maximum load factor determine this value. TGs to dynamic link stations
on this port use this value.
Click on Values and select a number from the list.
1.3.6.1.4.1.18.3.5.14.1.3.1.27

Implicit Connection Cost
128
0 to 255, inclusive
Specifies the relative cost (per connect time) of using a TG to dynamic
link stations on this port. A value of 0 indicates no cost, and a value of
255 indicates maximum cost. The cost per connect time is typically based
on the applicable tariffs for the transmission facility this TG uses. An
X.25 network, for example, may have a high connection cost for dynamic
link stations.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.3.1.28

3-29

Configuring APPN Services

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:

128
0 to 255, inclusive
Specifies the relative cost of transmitting a byte over this TG to a dynamic
link station on this port. A value of 0 indicates no cost, and a value of 255
indicates maximum cost. An X.25 network, for example, may have a high
byte cost for dynamic link stations.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.3.1.29

Implicit Security

Default:

Nonsecure

Options:

Nonsecure
Public-Switched
Underground
Conduit
Encrypted
Guarded radiation
Maximum

Function:

Specifies the security level of the TG to the dynamic link stations on this
port.

Instructions:

Click on Values and select one of the common definitions indicated under
Options.

MIB Object ID:

3-30

Implicit Byte Cost

1.3.6.1.4.1.18.3.5.14.1.3.1.30

303511-A Rev 00

Editing APPN Parameters

Parameter:

Implicit Delay

Default:

Negligible

Options:

Negligible
Terrestrial
Packet
Long
Maximum

Function:

Specifies the propagation delay, or the relative amount of time that it takes
for a signal to travel the length of a TG to dynamic link stations on this
port.

Instructions:

Click on Values and select a common definition indicated under Options.

MIB Object ID:

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.3.1.31

Implicit User-Defined 1
128
0 to 255
Specifies the first user-defined TG characteristic to a dynamic link station
on this port.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.3.1.32

Implicit User-Defined 2
128
0 to 255
Specifies the second user-defined TG characteristic to a dynamic link
station on this port.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.3.1.33

3-31

Configuring APPN Services

Parameter:
Default:
Range:
Function:
Instructions:

Implicit User-Defined 3
128
0 to 255
Specifies the third user-defined TG characteristic to a dynamic link
station on this port.
Enter a value in the range 0 to 255.

MIB Object ID:

1.3.6.1.4.1.18.3.5.14.1.3.1.34

Parameter:

DLUR Implicit LS Support

Default:

Disable

Options:

Enable | Disable

Function:

Instructions:
MIB Object ID:

Parameter:

Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.3.1.40

HPR Implicit LS Support

Default:

Enable

Options:

Enable | Disable

Function:
Instructions:
MIB Object ID:

3-32

Enables DLUR for implicit link stations on this port. This parameter is
available when the DLUR Support Enable/Disable parameter is set to
Enable.

Enables HPR for implicit link stations on this port. This parameter is
available when the HPR Support parameter is set to Enable.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.3.1.35

303511-A Rev 00

Editing APPN Parameters

Parameter:

LLC Error Recovery Under HPR

Default:

Disable

Options:

Enable | Disable

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

303511-A Rev 00

Enables or disables LLC error recovery on implicit link stations on this
port. This parameter is available when the global HPR Support parameter
is set to Enable, and when the HPR Implicit LS Support parameter is set
to Enable on this port.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.3.1.36

Implicit Link Deactivation Time
120
5 to 255
Specifies the time (in seconds) before implicit link stations on this port
deactivate if it is an HPR limited resource. This parameter is available
when the Implicit Limited Resource is set to Yes, and when the HPR
Support and the HPR Implicit LS Support parameters are set to Enable.
Enter a value in the range 5 to 255, inclusive.
1.3.6.1.4.1.18.3.5.14.1.3.1.37

3-33

Configuring APPN Services

Parameter:

HPR UI SAP

Default:

Options:

Any 2-digit hexadecimal value

Function:

Specifies the local HPR service access point address for unnumbered
information (UI) frames on this port. A UI frame is an LLC frame type on
which LLC does not perform link-level error recovery. This parameter is
available when HPR Support is set to Enable.
In base APPN/LLC2 configurations, LLC2 performs link-level recovery
by sending information frames (I-frames). If you disable link-level error
recovery with the HPR Link-Level Error Recovery parameter, APPN
sends the HPR network layer packets as UI frames, since RTP performs
the link-level error recovery on an end-to-end basis.

Instructions:
MIB Object ID:

3-34

Enter any 2-digit hexadecimal value. The 0x prefix is optional. For
example, the value C8 uses the 0x prefix.
1.3.6.1.4.1.18.3.5.14.1.3.1.39

303511-A Rev 00

Editing APPN Parameters

Editing APPN Adjacent Link Stations
To edit APPN Adjacent Link Station parameters, begin at the Configuration
Manager window (refer to Figure 3-1) and
1.

Select Protocols > APPN > Adjacent Link Stations.
The APPN Adjacent Link Station List window appears (Figure 3-8).

Figure 3-8.

APPN Adjacent Link Station List Window
2.

Edit those parameters you want to change.
If the window appears without any adjacent link stations in the list, go to the
section “Adding Adjacent Link Stations.”

303511-A Rev 00

3-35

Configuring APPN Services
3.

Click on Apply to save your changes.

Click on Done to exit the window.
To edit the advanced adjacent link station parameters, click on Advanced and
go to the section “Editing Advanced Adjacent Link Station Parameters.”

Parameter:

Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables the adjacent link station highlighted in the APPN
Adjacent Link Station List window.
Enable -- Initializes the selected adjacent link station. You can also use
the Enable setting to initialize an existing adjacent link station port that
you disabled earlier.
Disable -- Forces the adjacent link station into the “down” (inoperative)
state.

Instructions:

Click on Values and select Enable or Disable. Select Disable to disable
the adjacent link station.
Select Enable to enable or reenable the adjacent link station.

MIB Object ID:

Parameter:

Port Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters

Function:
Instructions:
MIB Object ID:

3-36

1.3.6.1.4.1.18.3.5.14.1.4.1.2

Specifies the name of the port supporting the adjacent link station.
Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.4.1.4

303511-A Rev 00

Editing APPN Parameters

Parameter:

Adjacent Node Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with
up to 8 characters

Function:
Instructions:

MIB Object ID:

303511-A Rev 00

Identifies the name of the network and the adjacent node name.
Type to 8 characters for the network ID name, follow with a period, then
type a control point name with up to 8 characters. You must use uppercase
characters only and the first character must be non-numeric. Blank spaces
(leading, trailing, and embedded) are not allowed in the node name. For
example, APPNNODE.CPONE is a valid entry for the Adjacent Node
Name parameter.
1.3.6.1.4.1.18.3.5.14.1.4.1.6

3-37

Configuring APPN Services

Parameter:

Adjacent Node Type

Default:

LEARN

Options:

LEARN
NN
EN
BACK LEVEL LEN NODE
HOST XID 3
HOST XID 0
DSPU XID
DSPU NO XID

Function:
Instructions:

Specifies the type of adjacent link station node.
Click on Values and select an adjacent node type, as indicated under
Options.
LEARN -- APPN automatically learns the type of adjacent link station.
NN -- Network Node
EN -- End Node
BACK LEVEL LEN NODE -- Back-level low-entry networking node.
HOST XID 3 -- Host node that supports XID3 protocols; includes the
network name control vector.
HOST XID 0 -- Host node that supports XID0 protocols.
DSPU XID -- Down stream physical unit (DSPU) node that supports
XID3 protocols, but does not include the network name control vector.
DSPU NO XID -- Down stream physical unit (DSPU) node that does not
support XID protocols. This selection is valid on nonswitched ports and is
invalid on negotiable ports.

MIB Object ID:

3-38

1.3.6.1.4.1.18.3.5.14.1.4.1.23

303511-A Rev 00

Editing APPN Parameters

Parameter:

Enable DLUR Support for this LS

Default:

Disable

Options:

Enable | Disable

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies whether the adjacent link station is a PU2.0 node to be serviced
by DLUR.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.4.1.28

Primary DLUS Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with
up to 8 characters

Function:
Instructions:

MIB Object ID:

Parameter:

Specifies the fully qualified name of the DLUS node that will serve the
PU2.0 link station.
Type up to 8 characters for the network ID name; follow with a period,
and then type a control point name with up to 8 characters. You must use
uppercase characters only and the first character must be non-numeric.
Blank spaces (leading, trailing, and embedded) are not allowed in the
node name. For example, APPNNODE.DLUR is a valid entry for this
parameter.
1.3.6.1.4.1.18.3.5.14.1.4.1.30

DSPU Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters.

Function:
Instructions:
MIB Object ID:
303511-A Rev 00

Specifies the name of the down stream physical unit (DSPU) supported by
DLUR.
Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded). The first character must be a letter.
1.3.6.1.4.1.18.3.5.14.1.4.1.29
3-39

Configuring APPN Services

Parameter:

Adjacent Node Block Number

Default:

None

Options:

None

Function:
Instructions:

A unique hexadecimal value that identifies APPN in this adjacent node.
The number is the first 3 digits of the node ID.
Accept the derived value that displays in this field.

MIB Object ID:

1.3.6.1.4.1.18.3.5.14.1.4.1.10

Parameter:

Adjacent Node ID Number

Default:

None

Options:

Optional; if specified, a valid string of 5 hexadecimal digits (0 to 9,
A,B,C,D,E,F)

Function:

Instructions:
MIB Object ID:

3-40

Identifies the local APPN adjacent node and is present in APPN alerts and
exchange identifications (XIDs). These 5 digits are combined with the
3-digit block number to form a unique XID node identification for the
adjacent node. The APPN network node and the adjacent node exchange
node identifications when establishing a connection.
Enter 5 hexadecimal digits.
1.3.6.1.4.1.18.3.5.14.1.4.1.11

303511-A Rev 00

Editing APPN Parameters

Parameter:

Link Address (hex)

Default:

None

Options:

None

Function:

Specifies the MAC/SAP, DLCI/SAP (for frame relay), or SDLC address
that this adjacent link station will use. This field displays the address you
specified when you added the adjacent link station. The MAC address
starts with the 0x prefix and ends with the SAP value.

Instructions:

If you choose to specify a new link data address, specify the MAC address
in MSB noncanonical format with the 0x prefix, and end the address with
the SAP value. For frame relay, specify a valid DLCI and SAP value. For
SDLC, specify a valid SDLC address.

MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.4.1.27

Max Send BTU Size
2057
256 to 4105
Specifies the maximum Basic Transmission Unit (BTU) size that can be
sent over this TG to an adjacent link station. Each link station determines
its own maximum send BTU size based on local node definitions and
exchange identification (XID) information received from the interface and
the adjacent link station.
Enter a number in the range 256 to 4105. The minimum setting for HPR
links is 768.
1.3.6.1.4.1.18.3.5.14.1.4.1.14

3-41

Configuring APPN Services

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:

Target Pacing Count
4
0 to 32767
Specifies the pacing window size for session requests (BINDs) on this TG
to the adjacent link station. APPN uses this value for fixed BIND pacing.
Pacing windows control the number of session requests to prevent
memory consumption at the adjacent link station.
Enter a value in the range 0 to 32767.
1.3.6.1.4.1.18.3.5.14.1.4.1.13

HPR Support for this LS

Default:

Disable

Options:

Enable | Disable

Function:
Instructions:
MIB Object ID:

Enables or disables HPR on this link station. This parameter is available
when the HPR Support parameter is set to Enable.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.4.1.32

Deleting Adjacent Link Stations
To delete an adjacent link station from the APPN Adjacent Link Station List
window (refer to Figure 3-8), select the adjacent link station and click on Delete.
The system software deletes the entry from the APPN configuration.

3-42

303511-A Rev 00

Editing APPN Parameters

Adding Adjacent Link Stations
To add an adjacent link station to an APPN interface, display the APPN Adjacent
Link Station List window (refer to Figure 3-8) and then
1.

Click on Add.
The APPN Adjacent Link Station Port Configuration window appears
(Figure 3-9).

Figure 3-9.

APPN Adjacent Link Station Port Configuration Window
2.

Specify the Port Name parameter, as follows:

Parameter:

Port Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters

Function:

Specifies the name of the port supporting the adjacent link station.

Instructions:
MIB Object ID:
3.

Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.4.1.4

Click on OK.
The screen displays the APPN Adjacent Link Station Configuration window
specific to your network (Figure 3-10).

303511-A Rev 00

3-43

Configuring APPN Services

Figure 3-10.

APPN Adjacent Link Station Configuration Window
4.

3-44

Edit the following parameters, using the parameter descriptions for:
•

Adjacent Link Station Name

•

Adjacent Node Name

•

Address parameters for the specific network (MAC, SAP, DLCI, SLDC)

•

Enable DLUR Support for this LS

•

Primary DLUS Name

•

DSPU Name

•

Adjacent Node ID Number

•

Adjacent Node Block Number

303511-A Rev 00

Editing APPN Parameters
5.

Click on OK to save your entries to the configuration file.
The APPN Adjacent Link Station List window (Figure 3-8) reappears.

Parameter:

Adjacent Link Station Name

Default:

None

Options:

Any name with up to 8 uppercase alphabetic characters

Function:

Instructions:
MIB Object ID:

Parameter:

Specifies a unique name for the link station (control point) in the adjacent
node. This name differentiates this link station from other defined link
stations.
Specify the link station name with up to 8 uppercase characters. Do not
specify numbers in the name.
1.3.6.1.4.1.18.3.5.14.1.4.1.3

Adjacent Node Name

Default:

The Configuration Manager uses the local NETID for the NETID portion
of this parameter. You can change the name if the adjacent node had a
different NETID.

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with
up to 8 characters.

Function:

Identifies the user-specified name of the network and the adjacent node
name.

Instructions:

Type up to 8 characters for the network ID name; follow with a period;
then type a control point name with up to 8 characters. You must use
uppercase characters only and the first character must be non-numeric.
Blank spaces (leading, trailing, and embedded) are not allowed in the
node name. For example, APPNNODE.CPONE is a valid entry for this
parameter.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.4.1.6

3-45

Configuring APPN Services

Parameter:
Default:

None

Options:

Any unique 48-bit 12-digit hexadecimal MAC-level address

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies a unique MAC-level address for this port connecting the
adjacent link station.
Enter a 12-digit hexadecimal MAC-level address in MSB noncanonical
format.
1.3.6.1.4.1.18.3.5.14.1.4.1.27

SAP (hex)

Default:

None

Options:

Any unique service access point (SAP) 2-digit hexadecimal value

Function:

Instructions:
MIB Object ID:

Parameter:

Specifies a service access point (SAP) address that lets multiple
applications and protocol entities in a single computer share a MAC
address.
Enter a 2-digit hexadecimal value.
1.3.6.1.4.1.18.3.5.14.1.4.1.27

SDLC Address (hex)

Default:

None

Options:

Any unique 2-digit hexadecimal SDLC-level address

Function:
Instructions:
MIB Object ID:

3-46

MAC Address

Specifies a unique SDLC address for this circuit.
Enter a 2-digit hexadecimal address.
1.3.6.1.4.1.18.3.5.14.1.4.1.27

303511-A Rev 00

Editing APPN Parameters

Parameter:

DLCI Address

Default:

None

Options:

Valid range changes based on the frame relay address length, as follows:

Function:
Instructions:
MIB Object ID:

Parameter:

Address Length

Range

2 bytes

16-1007

3 bytes

1024-64511

4 bytes

131072-8257535

This number is the PVC identification number that the frame relay
network uses to direct data.
Enter a decimal number within the valid range.
1.3.6.1.4.1.18.3.5.14.1.4.1.27

Enable DLUR Support for this LS

Default:

Disable

Options:

Enable | Disable

Function:

Instructions:
MIB Object ID:

303511-A Rev 00

Specifies whether the adjacent link station is a PU2.0 node to be serviced
by DLUR. DLUR is an APPN component that allows dependent logical
units (LU type 0,1,2,3 and dependent LU6.2) within APPN.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.4.1.28

3-47

Configuring APPN Services

Parameter:
Default:
Options:

Primary DLUS Name
None
Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with

up to 8 characters
Function:
Instructions:

MIB Object ID:

Parameter:

Type up to 8 characters for the network ID name; follow with a period;
and then type a control point name with up to 8 characters. You must use
uppercase characters only and the first character must be non-numeric.
Blank spaces (leading, trailing, and embedded) are not allowed in the
node name. For example, APPNNODE.DLUS is a valid entry for this
parameter.
1.3.6.1.4.1.18.3.5.14.1.4.1.30

DSPU Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters.

Function:
Instructions:
MIB Object ID:

3-48

Specifies the fully qualified name of the DLUS node that will serve the
PU2.0 link station.

Specifies the name of the downstream physical unit (DSPU) supported by
DLUR.
Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.4.1.29

303511-A Rev 00

Editing APPN Parameters

Parameter:

Adjacent Node ID Number

Default:

None

Options:

Optional; if specified, a valid string of 5 hexadecimal digits (0 to 9,
A,B,C,D,E,F)

Function:

Instructions:
MIB Object ID:

Enter 5 hexadecimal digits.
1.3.6.1.4.1.18.3.5.14.1.4.1.11

Parameter:

Adjacent Node Block Number

Default:

None

Options:

None

Function:

A unique hexadecimal value that identifies APPN in this adjacent node.
The number is the first 3 digits of the node ID.

Instructions:
MIB Object ID:

Accept the derived value that displays in this field.
1.3.6.1.4.1.18.3.5.14.1.4.1.10

Editing Advanced Adjacent Link Station Parameters
To edit APPN Advanced Adjacent Link Station parameters, display the APPN
Adjacent Link Station List window (refer to Figure 3-8) and then:
1.

Click on Advanced.
The APPN Adjacent Link Station Advanced Configuration window appears
(Figure 3-11).

303511-A Rev 00

3-49

Configuring APPN Services

Figure 3-11.

3-50

APPN Adjacent Link Station Advanced Configuration Window
2.

Click on each parameter value that you want to change; then enter a new
value.

Click on OK to save your changes and exit the window.

303511-A Rev 00

Editing APPN Parameters

Parameter:

Limited Resource TG

Default:

Options:

Yes | No

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

Parameter:

Specifies whether the adjacent link station is classified as a limited
resource. If you specify Yes, the TG to the adjacent link station is
deactivated when the number of active sessions drops to zero.
Click on Values and specify Yes or No.
1.3.6.1.4.1.18.3.5.14.1.4.1.8

TG Number
1
1 to 20
Specifies the number of the transmission group to this link station.
Specify a number in the range 1 to 20.
1.3.6.1.4.1.18.3.5.14.1.4.1.7

CP-CP Session Support

Default:

Yes

Options:

Yes | No

Function:

Instructions:
MIB Object ID:

303511-A Rev 00

Specifies whether the adjacent link station supports CP-CP sessions.
APPN nodes (network nodes and end nodes) that support control points
can communicate, register, and share network resources. Setting this
parameter to No can reduce traffic across the TG.
Click on Values and select Yes or No.
1.3.6.1.4.1.18.3.5.14.1.4.1.12

3-51

Configuring APPN Services

Parameter:
Default:

Disable

Options:

Enable | Disable

Function:
Instructions:

MIB Object ID:

Parameter:

Specifies whether APPN automatically activates the link to the adjacent
link station when a session is established.
If the CP-CP Session Support parameter is set to Yes, then this parameter
is not modifiable. Otherwise, specify Enable to automatically activate the
link when there is a session to the adjacent link station.
1.3.6.1.4.1.18.3.5.14.1.4.1.24

Backup DLUS Name

Default:

None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is the control point name with
up to 8 characters

Function:
Instructions:

MIB Object ID:

3-52

Automatic Activation

Specifies the fully qualified name of the DLUS node that serves as a
backup to the PU2.0 link station.
Type up to 8 characters for the network ID name; follow with a period;
and then type a control point name with up to 8 characters. You must use
uppercase characters only and the first character must be non-numeric.
Blank spaces (leading, trailing, and embedded) are not allowed in the
node name. For example, APPNNODE.DLUR is a valid entry for the
Backup DLUS Name parameter.
1.3.6.1.4.1.18.3.5.14.1.4.1.31

303511-A Rev 00

Editing APPN Parameters

Parameter:

Use Default TG Characteristics

Default:

Yes

Options:

Yes | No

Function:

Instructions:
MIB Object ID:

Parameter:

Specifies whether APPN uses default or configured TG characteristics on
the port connecting the adjacent link station. The configurable TG
characteristics are: Effective Capacity, Connection Cost, Byte Cost,
Security, Delay, User 1, User 2, and User 3.
Click on Values and specify Yes or No.
1.3.6.1.4.1.18.3.5.14.1.4.1.26

Effective Capacity

Default:

16M

Options:

1200
2400
4800
7200
9600
14400
19200
48000
56000
64000
4M
10M
16M
Maximum

Function:

Instructions:
MIB Object ID:

303511-A Rev 00

The effective capacity is the highest bit-transmission rate allowed on the
TG to adjacent link stations on this port. The effective capacity is derived
from the link bandwidth.
Click on Values and select a number that reflects the link bandwidth.
1.3.6.1.4.1.18.3.5.14.1.4.1.15

3-53

Configuring APPN Services

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

3-54

Connection Cost
128
0 to 255
Specifies the relative cost (per connect time) of using a TG to the adjacent
link station on this port. A value of 0 indicates no cost, and a value of 255
indicates maximum cost. The cost per connect time is typically based on
the applicable tariffs for the transmission facility that this TG uses.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.4.1.16

Byte Cost
128
0 to 255 inclusive
Specifies the relative cost of transmitting a byte over this TG to an
adjacent link station on this port. A value of 0 indicates no cost, and a
value of 255 indicates maximum cost.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.4.1.17

303511-A Rev 00

Editing APPN Parameters

Parameter:

Security

Default:

Nonsecure

Options:

Nonsecure
Public-Switched
Underground
Conduit
Encrypted
Guarded radiation
Maximum

Function:
Instructions:
MIB Object ID:

Parameter:

Specifies the security level of the TG to the adjacent link station on this
port.
Click on Values and select one of the common definitions indicated under
Options.
1.3.6.1.4.1.18.3.5.14.1.4.1.18

Delay

Default:

Negligible

Options:

Negligible
Terrestrial
Packet
Long
Maximum

Function:

Indicates the propagation delay or the relative amount of time a signal
takes to travel the length of a TG to the adjacent link station on this port.

Instructions:

Click on Values and select one of the common definitions indicated under
Options.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.1.4.1.19

3-55

Configuring APPN Services

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

3-56

User-Defined 1
128
0 to 255
Specifies the first user-defined TG characteristic using this link station.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.4.1.20

User-Defined 2
128
0 to 255
Specifies the second user-defined TG characteristic using this link station.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.4.1.21

User-Defined 3
128
0 to 255
Specifies the third user-defined TG characteristic using this link station.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.4.1.22

303511-A Rev 00

Editing APPN Parameters

Parameter:

LLC Error Recovery Under HPR

Default:

Disable

Options:

Enable | Disable

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Enables or disables LLC error recovery on this link station. This
parameter is available when the global HPR Support parameter is set to
Enable, and when the HPR Support for this LS parameter is set to Enable
on this link station.
Click on Values and select Enable or Disable.
1.3.6.1.4.1.18.3.5.14.1.4.1.33

Link Deactivation
120
5 to 255
Specifies the time (in seconds) before APPN deactivates this link station
if it is an HPR limited resource. This parameter is available when the
following parameters are set to Enable:
•

HPR Support

•

HPR Support for this LS

•

Limited Resource

Specify a value in the range 5 to 255, inclusive.
1.3.6.1.4.1.18.3.5.14.1.4.1.34

Editing APPN Connection Networks
An APPN connection network lets you route session traffic directly between two
link stations, without intermediate node intervention. Connection networks
require link definitions at a network node for any directly connected nodes.
To edit Connection Networks parameters from the Configuration Manager
window (refer to Figure 3-1).

303511-A Rev 00

3-57

Configuring APPN Services
1.

Select Protocols > APPN > Connection Networks.
The APPN Connection Network List window appears (Figure 3-12).

Figure 3-12.

Parameter:

APPN Connection Network List Window

Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables APPN routing on the selected connection network.
Enable -- Initializes routing on the selected APPN connection network.
You can also use the Enable setting to initialize an existing connection
network that you disabled earlier.
Disable -- Brings down routing on the APPN connection network.

Instructions:

Select Disable only to disable APPN routing over this connection
network.
Select Enable to enable or reenable APPN routing over this connection
network.

MIB Object ID:
3-58

1.3.6.1.4.1.18.3.5.14.1.6.1.2
303511-A Rev 00

Editing APPN Parameters

Adding APPN Connection Networks
To add a connection network to an APPN configuration, display the APPN
Connection Network List window (Figure 3-12) and proceed as follows:
1.

Click on Add.
The Connection Network Configuration window appears (Figure 3-13).

Enter the Connection Network Name and the Connection Network Port
Name parameters.

Click on OK to save your entries to the configuration file.
The APPN Connection Network List window (Figure 3-12) reappears.

Figure 3-13.

303511-A Rev 00

Connection Network Configuration Window

3-59

Configuring APPN Services

Parameter:
Default:

Connection Network Name
None

Options:

Any valid name with up to 17 characters in the format
.; NETID is the unique network name with up to 8
characters followed by a period, and NAME is any name with up to 8

characters. (Do not enter the angle brackets; these indicate a variable to be
substituted.)
Function:

The Connection Network Name parameter identifies the arbitrary
user-specified name of the connection network. By default, the NETID
portion of the network name is the previously configured Local Node
Name parameter, as specified in the Edit APPN Global Parameters
window (Figure 3-2).

Instructions:

MIB Object ID:

Following the default NETID name and the period(.), enter a name with up
to 8 characters. You must use uppercase characters only and the first
character must be non-numeric. Blank spaces (leading, trailing, and
embedded) are not allowed in the node name. For example,
APPNNODE.THREE is a valid entry for the Connection Network Name
parameter.
1.3.6.1.4.1.18.3.5.14.1.6.1.3

Parameter:

Connection Network Port Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters

Function:

Specifies the name of the port for the connection network.

Instructions:
MIB Object ID:
4.

Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.7.1.4

Click on OK to save your changes.

Deleting APPN Connection Networks
To delete a connection network from the APPN Connection Network List window
(refer to Figure 3-12), select the network name, then click on Delete. The system
software deletes the entry from the APPN configuration.

3-60

303511-A Rev 00

Editing APPN Parameters

Editing APPN Connection Network Ports
The APPN Connection Network List window (Figure 3-12) allows you to enable
or disable connection network ports, add and delete ports on existing connection
networks, and edit advanced connection network parameters. From the APPN
Connection Network List window,
1.

Select Ports.
The APPN Connection Network Port List window appears (Figure 3-14).

Figure 3-14.
2.

APPN Connection Network Port List Window

Select the port you want to modify.
Change the setting of the following Enable/Disable parameter, if necessary.

303511-A Rev 00

3-61

Configuring APPN Services

Parameter:

Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:

Enables or disables APPN routing on this connection network port.
Enable -- Initializes the selected APPN connection network port. You can
also use the Enable setting to initialize an existing port that you disabled
earlier.
Disable -- Forces the APPN connection network port into the “down”
(inoperative) state.

Instructions:

Select Disable to disable APPN routing over this connection network
port.
Select Enable to reenable APPN routing over this connection network
port.

MIB Object ID:

1.3.6.1.4.1.18.3.5.14.1.7.1.2

Adding APPN Connection Network Ports
To add a port to an APPN connection network, display the APPN Connection
Network Port List window (refer to Figure 3-14) and then
1.

Click on Add.
The Connection Network Port Configuration window appears (Figure 3-15).

Figure 3-15.
3-62

Connection Network Port Configuration Window
303511-A Rev 00

Editing APPN Parameters
2.

Edit the Connection Network Port Name parameter.

Click on OK to save the port name to the configuration file.
The APPN Connection Network Port List window (Figure 3-14) reappears.

Parameter:

Connection Network Port Name

Default:

None

Options:

Up to 8 alphanumeric uppercase characters

Function:

Specifies the name of the new port for the connection network.

Instructions:
MIB Object ID:
4.

Enter up to 8 alphanumeric uppercase characters with no blank spaces
(leading, trailing, or embedded).
1.3.6.1.4.1.18.3.5.14.1.7.1.4

Click on OK to save your changes.

Deleting APPN Connection Network Ports
To delete a port from a connection network on the APPN Connection Network
Port List window (refer to Figure 3-14), select the port to highlight it, then click
on Delete. The system software deletes the entry from the APPN configuration.

Editing APPN Advanced Connection Network Parameters
To edit APPN Advanced Connection Network parameters, display the APPN
Connection Network List window (Figure 3-12) and then
1.

Select the connection network that you want to edit. Click on Advanced.
The APPN Connection Network Advanced Parameters window appears
(Figure 3-16). The connection network name that you selected appears in the
title bar.

303511-A Rev 00

3-63

Configuring APPN Services

Figure 3-16.

3-64

APPN Connection Network Advanced Parameters Window
2.

Click on each parameter value that you want to change; then enter a new
value.

Click on OK to save your changes and exit the window.

303511-A Rev 00

Editing APPN Parameters

Parameter:

Effective Capacity

Default:

16M

Options:

1200
2400
4800
7200
9600
14400
19200
48000
56000
64000
4M
10M
16M
Maximum

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

303511-A Rev 00

Represents the highest bit transmission rate value allowed on connection
network TGs over configured connection network ports. The effective
capacity is derived from the link bandwidth.
Click on Values and select a number that reflects the link bandwidth.
1.3.6.1.4.1.18.3.5.14.1.6.1.5

Connection Cost
128
0 to 255
Specifies the relative cost (per connect time) of using a connection
network TG over configured connection network ports. A value of 0
indicates no cost, and a value of 255 indicates maximum cost. The cost
per connect time is typically based on the applicable tariffs for the
transmission facility that this TG uses.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.6.1.6

3-65

Configuring APPN Services

Parameter:
Default:
Range:
Function:

Instructions:
MIB Object ID:

Parameter:

128
0 to 255
Specifies the relative cost of transmitting a byte over this connection
network TG using configured connection network ports. A value of 0
indicates no cost, and a value of 255 indicates maximum cost.
Enter a number in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.6.1.7

Security

Default:

Nonsecure

Options:

Nonsecure
Public-Switched
Underground
Conduit
Encrypted
Guarded radiation
Maximum

Function:
Instructions:
MIB Object ID:

3-66

Byte Cost

Specifies the security level of the connection network TG over configured
connection network ports.
Click on Values and select a definition from the Options list.
1.3.6.1.4.1.18.3.5.14.1.6.1.8

303511-A Rev 00

Editing APPN Parameters

Parameter:

Delay

Default:

Negligible

Options:

Negligible
Terrestrial
Packet
Long
Maximum

Function:

Instructions:
MIB Object ID:

Parameter:
Default:
Range:
Function:
Instructions:
MIB Object ID:

303511-A Rev 00

Represents the propagation delay or the relative amount of time that a
signal takes to travel the length of a connection network TG over
configured connection network ports.
Click on Values and select a definition from the Options list.
1.3.6.1.4.1.18.3.5.14.1.6.1.9

User-Defined 1
128
0 to 255
Specifies the first user-defined TG characteristic for this connection
network.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.6.1.10

User-Defined 2
128
0 to 255
Specifies the second user-defined TG characteristic for this connection
network.
Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.6.1.11

3-67

Configuring APPN Services

Parameter:

User-Defined 3

Default:

128

Range:

0 to 255

Function:

Specifies the third user-defined TG characteristic for this connection
network.

Instructions:
MIB Object ID:

Enter a value in the range 0 to 255.
1.3.6.1.4.1.18.3.5.14.1.6.1.12

Editing APPN Directory Entry Parameters
You can define directory entries for network resources that APPN cannot
dynamically locate, such as LUs on a LEN node. Directory entries can avoid
network searches for commonly used resources. The directory is hierarchical in
structure. For example, to configure directory entries for LUs on an adjacent LEN
node, first configure the LEN as an end node control point (ENCP) with the local
NN as the parent. You then define LUs with the LEN as the parent.
Directory entries can specify the full name of the resource, or can include an
asterisk (*) to indicate a wildcard entry. Wildcard entries simplify the definition of
many similarly named resources. For example, if a node contains LUs named
APPN.LUX1, APPN.LUX2, and so on, you can use the single wildcard entry
APPN.LUX*.
To edit APPN directory entry parameters, begin at the Configuration Manager
window (Figure 3-1) and then
1.

Select Protocols > APPN > Directory Entries.
The APPN Directory Entry List window appears (Figure 3-17). The window
displays the qualified LU names of any APPN nodes currently configured for
directory services in the local directory database.

3-68

303511-A Rev 00

Editing APPN Parameters

Figure 3-17.

APPN Directory Entry List Window
2.

Edit the Enable/Disable, Resource Type, Parent Name, and Parent Type
parameters (if the current window contains one or more directory
services LU names).

Parameter:

Enable/Disable

Default:

Enable

Options:

Enable | Disable

Function:
Instructions:

Enables or disables APPN directory services on the selected LU name.
Select Disable only to disable APPN directory services on this LU.
Select Enable to enable or reenable APPN directory services on this LU.

MIB Object ID:

303511-A Rev 00

1.3.6.1.4.1.18.3.5.14.4.3.1.2
3-69

Configuring APPN Services

Parameter:
Default:

LU (logical unit)

Options:

LU (logical unit)
ENCP (end node control point)
NNCP (network node control point)
Wildcard (*)

Function:

Instructions:

MIB Object ID:

Parameter:

Specifies the type of resource for this directory services entry. When you
set this parameter to LU, the local directory services database contains
pointers to the CP name of the node owning the LU and the CP name of
the network node server.
Click on Values and select LU, ENCP, NNCP or Wildcard (*). Specify
Wildcard to instruct APPN that the entry uses the asterisk (*) wildcard.
Refer to the beginning of this section for information on using the
wildcard with directory entries.
1.3.6.1.4.1.18.3.5.14.4.3.1.4

Parent Name

Default:

None

Options:

None

Function:

Specifies the fully qualified APPN node name . that
owns the selected LU name from the list. By default, the NETID portion of
the parent name is the previously configured Local Node Name
parameter, as specified on the Edit APPN Global Parameters window
(Figure 3-2).

Instructions:

Enter the fully qualified APPN node name in the format
.. (Do not enter the angle brackets; these indicate a
variable to be substituted.) Type up to 8 characters for the network ID
name; follow with a period; then a control point name with up to 8
characters. You must use uppercase characters only and the first character
must be non-numeric. Blank spaces (leading, trailing, and embedded) are
not allowed in the node name. For example, NETWORKA.SYSTEMA is
a valid entry for the Parent Name parameter.

MIB Object ID:

3-70

Resource Type

1.3.6.1.4.1.18.3.5.14.4.3.1.5

303511-A Rev 00

Editing APPN Parameters

Parameter:

Parent Type

Default:

ENCP (End Node Control Point)

Options:

NNCP (Network Node Control Point)
ENCP (End Node Control Point)

Function:

Specifies the node type of the parent, either an APPN EN or NN.

Instructions:
MIB Object ID:
3.

Click on Values and specify NNCP or ENCP.
1.3.6.1.4.1.18.3.5.14.4.3.1.6

Click on Apply to save your changes.

Adding APPN LU Names to Directory Services
To add a qualified LU name to the directory services list, display the APPN
Directory Entry List window (Figure 3-17) and proceed as follows:
1.

Click on Add.
The Directory Entry Configuration window appears (Figure 3-18).

Figure 3-18.

303511-A Rev 00

Directory Entry Configuration Window

3-71

Configuring APPN Services
2.

Edit the Resource Name and Parent Name parameters.

Parameter:

Resource Name

Default:

None

Options:

None

Function:

Specifies the fully qualified name (.) of the resource to
be added to the local directory. By default, the NETID portion of the name
is the previously configured Local Node Name parameter, as specified on
the Edit APPN Global Parameters window (Figure 3-2).

Instructions:

Enter the fully qualified APPN resource (node or LU) name in the format
. (do not enter the angle brackets; these indicate a
variable to be substituted). Type up to 8 characters for the network ID
name; follow with a period; then a control point name with up to 8
characters. You must use uppercase characters only and the first character
must be non-numeric. Blank spaces (leading, trailing, and embedded) are
not allowed in the node name. For example, NETWORKA.SYSTEMA is
a valid entry for the Parent Name parameter.
Use the asterisk (*) wildcard to indicate a wildcard entry. Refer to
beginning of this section for information on using the wildcard with
directory entries.

MIB Object ID:

3-72

1.3.6.1.4.1.18.3.5.14.4.3.1.3

303511-A Rev 00

Editing APPN Parameters

Parameter:

Resource Type

Default:

LU (logical unit)

Options:

LU (logical unit)
ENCP (end node control point)
NNCP (network node control point)
Wildcard (*)

Function:

Instructions:

MIB Object ID:

Parameter:

Parent Name

Default:

None

Options:

None

Function:

Instructions:

MIB Object ID:

303511-A Rev 00

Specifies the fully qualified APPN node name (.) that
owns the resource being defined. By default, the NETID portion of the
name is the previously configured Local Node Name parameter, as
specified on the Edit APPN Global Parameters window (Figure 3-2).
Enter the fully qualified APPN node name in the format
. (do not enter the angle brackets; these are a
convention to indicate a variable to be substituted). Type up to 8
characters for the network ID name; follow with a period; then a control
point name with up to 8 characters. You must use uppercase characters
only and the first character must be non-numeric. Blank spaces (leading,
trailing, and embedded) are not allowed in the node name. For example,
NETWORKA.SYSTEMA is a valid entry for the Parent Name parameter.
1.3.6.1.4.1.18.3.5.14.4.3.1.5

3-73

Configuring APPN Services

Parameter:

Parent Type

Default:

ENCP (End Node Control Point)

Options:

NNCP (Network Node Control Point)
ENCP (End Node Control Point)

Function:

Specifies the parent node type owning this resource, either an APPN EN
or NN.

Instructions:
MIB Object ID:
3.

Click on Values and specify NNCP or ENCP.
1.3.6.1.4.1.18.3.5.14.4.3.1.6

Click on OK.
You return to the APPN Directory Entry List window (Figure 3-17).

Click on Done to exit the window.

Deleting APPN Directory Entires
To delete a directory entry from APPN Directory Entry List window (refer to
Figure 3-17), select the entry, then click on Delete. The system software deletes
the entry from the APPN configuration.

3-74

303511-A Rev 00

Appendix A
APPN Base and Optional Function Sets

This appendix gives the base and optional APPN function sets that Bay Networks
supports on routers configured as APPN network nodes.
Table A-1.

APPN Base Function Sets

Function Set Number

Description

001
002
003
006
007
008
010
011
013
020
021
023
024
030
031
033
034
035
036

LEN-level XID3
All XID3 States
Link Station Role Negotiation
CP Name on XID3
TG Number Negotiation
Multiple TGs
Single-Link TG
LFSID Addressing
Priority Queuing for Transmission
Extended BIND and UNBIND
Adaptive Pacing for Independent LU BINDs
BIND Segmenting and Reassembly
Adaptive Pacing for Dependent LU BINDs
CP-CP Sessions
CP Capabilities Exchange
FQPCID Generation
CD-Initiate
Reconstruct CD-Initiate Reply
COS/TPF

(continued)

303511-A Rev 00

A-1

Configuring APPN Services
Table A-1.

APPN Base Function Sets (continued)

Function Set Number

Description

037
038
039
040
041
042
050
051
052

BIND (ILU = PLU)
Limited Resource
BIND without RSCV from Any LEN or APPN Node
Propagate Unrecognized CVs
Session RU Segmenting and Reassembly
Interleaved Segments
Register EN Resources
Locate/Find/Found
Reconstruct GDS Variables for Locate Reply
and CD-Initiate Reply
Participate in Network Searches
Send Wildcard Reply
Broadcast and Directed Searches
ENCP Search Control
Partial Directory Entries
Accept Unqualified LU Name
Locate Chains/Locate (keep)
Sending Locate to a Gateway
Cache Resource Locations
Favor Explicit Replies
Network Qualified LU Name
Central Directory Client
Abbreviated Resource Hierarchy
Authentic Net ID Indicators
DS Support for Domain LEN Resources
Process Local Resource Change
Initial Topology Exchange
Flow Reduction Sequence Numbers
Resource Sequence Numbers
Topology Broadcast
Garbage Collection
Topology Isolation at Net ID Boundaries
Build RSCV
Calculate Route Using Connection Networks
Class-of-Service Manager
Route Randomization

053
054
055
056
057
059
060
061
062
063
064
065
066
068
069
070
073
074
075
076
077
078
079
080
081
082

(continued)

A-2

303511-A Rev 00

APPN Base and Optional Function Sets
Table A-1.

APPN Base Function Sets (continued)

Function Set Number

Description

083
084
085
090

Member of Connection Network
Select One-Hop Routes
Select Network Routes
Common Node Operator Command Set
(This is a product-specific function set.)
Network Node Operator Command Set
(This is a product-specific function set)
Extend/Unextend BIND and UNBIND
Fixed Session Level Pacing
Adaptive Session Level Pacing
Intermediate Session Segmenting/Reassembly
Routing BIND and UNBIND
Intermediate Session Routing for Dependent
LU Sessions
Intermediate Session Routing for Independent
LU Sessions

091
100
101
102
103
104
105
106

Management Services - Multiple Domain Support (MDS) Function Set
150
152
153
154

SNA/MS MDS Common Base
SNA/MS MDS Network Node Support
SNA/MS MDS High Performance Option
SNA/MS MDS Transport Confirmation Option

Management Services - Entry Point Alert Function Set

303511-A Rev 00

170
171
177
178

SNA/MS EP Alert Base Subset
SNA/MS Problem Diagnosis Data in Alert (Optional)
SNA/MS LAN Alert (Optional)
SNA/MS SDLC/LAN LLC Alert (Optional)

1001
1004
1013
1103
1104
1105
1109

Secondary-Initiated Non-Activation XID
Adjacent Node Name-Change
Interoperability with Peripheral Border Node
Retry Referred Search
Topology-Based Directory Non-Verify
PCID Modifier
Surrogate Owner

A-3

Configuring APPN Services

Table A-2.

Function Set Number

Description

1002
1007
1011

Adjacent Link Station Name
Parallel TGs
Multiple Local LUs, Session Manager for Local
Independent LU 6.2, and Intranode Routing
LU Name = CP Name
Delete EN Resources Before Registering
Dependent LU Requester
Central Resource Registration (of LUs)
Tree Caching and TG Caching
Nonpaced Intermediate Session Traffic
High Performance Routing
RTP Tower
Control Flows over RTP Tower

1012
1018
1067
1107
1200
1301
1400
1401
1402

A-4

APPN Optional Function Sets

303511-A Rev 00

Appendix B
APPN Default Settings

This appendix gives the default settings for APPN parameters. Use the
Configuration Manager to edit any of the default settings given here.

Table B-1.

APPN Global and Advanced Global Parameters

Parameter

Default

APPN Enable/Disable

Enable

Local Node Name

None

Local ID Block

None

Local ID Number

None

Route Addition Resistance

128

Endpoint Session RSCV Storage

Enable

Max Directory Entries

Max Cached Directory Entries

100

Network Local Timeout (in s)

TRS Route Tree Cache Size

TRS Route Tree Cache Size Usage Limit

Max NNs in Topology DB (0=Unlimited)

Max TGs in Topology DB (0=Unlimited)

Max Number of ISR Sessions

1000

(continued)
303511-A Rev 00

B-1

Configuring APPN Services
Table B-1.

APPN Global and Advanced Global Parameters (continued)

Parameter

Default

ISR Congestion Threshold

900

ISR Decongestion Threshold

800

Max RU Size for ISR Sessions

4096

ISR Receive Pacing Window

ISR Session RSCV Storage

Enable

DLUR Support Enable/Disable

Disable

Default DLUS Name

None

Default Backup DLUS Name

None

DLUR-DLUS RSCV Storage

Enable

HPR Support

Enable

HPR Path Switch Controller Support

Disable

Table B-2.

APPN Interface and Port Parameters

Parameter

Default

Interface Enable/Disable

Enable

Port Enable/Disable

Enable

Port Address

None

Local Link Station Role

Negotiable

Port Name

None

Port Number

None

Port DLCI Address

None

Port MAC Address

None

Port SAP (hex)

None

(continued)

B-2

303511-A Rev 00

APPN Default Settings
Table B-2.

APPN Interface and Port Parameters (continued)

Parameter

Default

Max Receive BTU Size

2057

Max Send BTU Size

2057

Max I-Frame Window

Total Link Activation Limits

Inbound Link Activation Limits

Outbound Link Activation Limits

Implicit CP Sessions

Yes

Implicit Limited Resource

Implicit Effective Capacity

16M

Implicit Connection Cost

128

Implicit Byte Cost

128

Implicit Security

Nonsecure

Implicit Delay

Negligible

Implicit User-Defined 1

128

Implicit User-Defined 2

128

Implicit User-Defined 3

128

DLUR Implicit LS Support

Disable

HPR Implicit LS Support

Enable

LLC Error Recovery Under HPR

Disable

Implicit Link Deactivation Time

120

HPR UI SAP

(continued)

303511-A Rev 00

B-3

Configuring APPN Services

Table B-3.

APPN Adjacent Link Station Parameters

Parameter

Default

Enable/Disable

Enable

Port Name

None

Adjacent Node Name

None

Adjacent Node Type

Learn

Enable DLUR Support for this LS

Disable

Primary DLUS Name

None

DSPU Name

None

Adjacent Node Block Number

None

Adjacent Node ID Number

None

Link Address (hex)

None

Max Send BTU Size

2057

Target Pacing Count

HPR Support for this LS

Disable

Adjacent Link Station Name

None

Adjacent Node Name

Local NETID for NETID portion of name

MAC Address (hex)

None

SAP (hex)

None

SDLC Address (hex)

None

DLCI Address

None

Limited Resource TG

TG Number

1 (or current unused minimum)

CP-CP Session Support

Yes

Automatic Activation

Disable

(continued)

B-4

303511-A Rev 00

APPN Default Settings
Table B-3.

APPN Adjacent Link Station Parameters (continued)

Parameter

Default

Backup DLUS Name

None

Use Default TG Characteristics

Effective Capacity

16M

Connection Cost

128

Byte Cost

128

Security

Nonsecure

Delay

Negligible

User-Defined 1

128

User-Defined 2

128

User-Defined 3

128

LLC Error Recovery Under HPR

Disable

Link Deactivation

120

Table B-4.

APPN Connection Networks and Port Parameters

Parameter

Default

Enable/Disable

Enable

Connection Network Name

None

Connection Network Port Name

None

Effective Capacity

16M

Connection Cost

128

Byte Cost

128

Security

Non-secure

Delay

Negligible

(continued)

303511-A Rev 00

B-5

Configuring APPN Services
Table B-4.
Parameter

Default

User-Defined 1

128

User-Defined 2

128

User-Defined 3

128

Table B-5.

B-6

APPN Connection Networks and Port Parameters (continued)

APPN Directory Services Parameters

Parameter

Default

Enable/Disable

Enable

Resource Type

Parent Name

None

Parent Type

ENCP

Resource Name

NETID portion of local node name

303511-A Rev 00

Index

A
acronyms, xvi
adaptive pacing, with ISR, 1-13
Adaptive Rate-Based (ARB) congestion control, 1-17
Adding
Adjacent link stations, 3-43 to 3-48
APPN connection network ports, 3-62 to 3-63
APPN connection networks, 3-59 to 3-60
APPN LU names to directory services, 3-71 to 3-74
APPN ports, 3-20 to 3-23
Adjacent Link Station Name parameter, 3-45
Adjacent Node Block Number parameter, 3-40, 3-49
Adjacent Node ID Number parameter, 3-40, 3-49
Adjacent Node Name parameter, 3-37, 3-45
Adjacent Node Type parameter, 3-38
Advanced Peer-to-Peer Networking. See APPN
APPN
accessing parameters, 3-2
connection networks, described, 1-10
control points, 1-5
defaults, B-1, B-4
enabling on LLC2 using SRB, 2-7 to 2-12
enabling over LLC2, 2-2 to 2-7
enabling over SDLC, 2-12 to 2-19
end nodes, described, 1-3
interfaces, described, 1-9
link stations, described, 1-9
LLC2 media support, 1-2
logical units (LUs), 1-5
low-entry networking nodes, described, 1-3
network nodes, described, 1-3
node types, 1-2
overview of, 1-2
ports, described, 1-9
related publications, 1-22
sample network, 1-4
303511-A Rev 00

SDLC media, 1-2
services, 1-19
source routing bridge encapsulation on, 1-2
APPN adjacent link stations
adding, 3-43 to 3-46
Adjacent Link Station Name parameter, 3-45
Adjacent Node Block Number parameter, 3-40,
3-49
Adjacent Node ID Number parameter, 3-40, 3-49
Adjacent Node Name parameter, 3-37, 3-45
Adjacent Node Type parameter, 3-38
Automatic Activation parameter, 3-52
Backup DLUS Name parameter, 3-52
Byte Cost parameter, 3-54
Connection Cost parameter, 3-54
CP-CP Session Support parameter, 3-51
Delay parameter, 3-55
deleting, 3-42
DLCI Address parameter, 3-47
DSPU Name parameter, 3-39, 3-48
editing, 3-35 to 3-57
editing advanced parameters, 3-49 to 3-56
Effective Capacity parameter, 3-53
Enable DLUR Support for this LS parameter, 3-39,
3-47
Enable/Disable parameter, 3-36
Limited Resource TG parameter, 3-51
Link Address (hex) parameter, 3-41
Link Deactivation parameter, 3-57
LLC Error Recovery Under HPR parameter, 3-57
MAC Address parameter, 3-46
Max Send BTU Size parameter, 3-41
Port Name parameter, 3-36, 3-43
Primary DLUS Name parameter, 3-39, 3-48
SAP (hex) parameter, 3-46
SDLC Address parameter, 3-22, 3-46
Security parameter, 3-55
Target Pacing Count parameter, 3-42

Index-1

APPN adjacent link stations (continued)
TG Number parameter, 3-51
Use Default TG Characteristics parameter, 3-53
User-Defined 1 parameter, 3-56
User-Defined 2 parameter, 3-56
User-Defined 3 parameter, 3-56
APPN connection networks
adding, 3-59 to 3-60
adding ports, 3-62 to 3-63
Byte Cost parameter, 3-66
Connection Cost parameter, 3-65
Connection Network Name parameter, 3-60
Connection Network Port Name parameter, 3-60,
3-63
Delay parameter, 3-67
deleting, 3-60
deleting ports, 3-63
editing, 3-57 to 3-68
editing advanced parameters, 3-63 to 3-68
editing ports, 3-61 to 3-62
Effective Capacity parameter, 3-65
Enable/Disable parameter, 3-58, 3-62
Security parameter, 3-66
User-Defined 1 parameter, 3-67
User-Defined 2 parameter, 3-67
User-Defined 3 parameter, 3-68
APPN directory entries
deleting, 3-74
APPN directory services
adding LU names to, 3-71 to 3-74
editing, 3-68 to 3-74
Enable/Disable parameter, 3-69
Parent Name parameter, 3-70, 3-73
Parent Type parameter, 3-71, 3-74
Resource Name parameter, 3-72
Resource Type parameter, 3-70, 3-73
APPN Enable/Disable parameter, 3-4
APPN global advanced parameters
Default Backup DLUS Name, 3-14
Default DLUS Name, 3-13
DLUR Support Enable/Disable, 3-13
DLUR-DLUS RSCV Storage, 3-14
editing, 3-5 to 3-14
Endpoint Session RSCV Storage, 3-7
HPR Support, 3-15
ISR Congestion Threshold, 3-11
ISR Decongestion Threshold, 3-11

Index-2

ISR Receive Pacing Window, 3-12
ISR Session RSCV Storage, 3-12
Max Cached Directory Entries, 3-8
Max Directory Entries, 3-8
Max NNs in Topology DB, 3-10
Max Number of ISR Sessions, 3-10
Max RU Size for ISR Sessions, 3-12
Max TGs in Topology DB, 3-10
Network Locate Timeout, 3-9
Route Addition Resistance, 3-7
TRS Route Tree Cache Size, 3-9
TRS Route Tree Cache Usage Limit, 3-9
APPN global parameters
editing, 3-3 to 3-5
Enable/Disable, 3-4
Local ID Block, 3-5
Local ID Number, 3-5
APPN interfaces
deleting, 3-17
editing, 3-15 to 3-17
Interface Enable/Disable parameter, 3-17
APPN parameters
accessing, 3-2
descriptions of, 2-1, 3-1
See also individual parameter names
APPN ports
adding, 3-20 to 3-23
deleting, 3-19
DLUR Implicit LS Support parameter, 3-32
editing, 3-17 to 3-34
editing advanced parameters, 3-23 to 3-34
HPR Implicit LS Support parameter, 3-32
HPR UI SAP parameter, 3-34
Implicit Byte Cost parameter, 3-30
Implicit Connection Cost parameter, 3-29
Implicit CP Sessions parameter, 3-28
Implicit Delay parameter, 3-31
Implicit Effective Capacity parameter, 3-29
Implicit Limited Resource parameter, 3-28
Implicit Link Deactivation Time parameter, 3-33
Implicit Security parameter, 3-30
Implicit User-Defined 1 parameter, 3-31
Implicit User-Defined 2 parameter, 3-31
Implicit User-Defined 3 parameter, 3-32
Inbound Link Activation Limits parameter, 3-26
Link Activation Limit Default Values (table), 3-27
LLC Error Recovery Under HPR parameter, 3-33
303511-A Rev 00

Local Link Station Role parameter, 3-19, 3-23
Max I-Frame Window parameter, 3-26
Max Receive BTU Size parameter, 3-25
Max Send BTU Size parameter, 3-25
Outbound Link Activation Limits parameter, 3-27
Port Address parameter, 3-19
Port DLCI Address parameter, 3-21
Port Enable/Disable parameter, 3-18
Port MAC Address parameter, 3-22
Port Name parameter, 3-21
Port Number parameter, 3-21
Port SAP (hex) parameter, 3-22
Total Link Activation Limits parameter, 3-26

defaults
APPN parameters, B-1, B-2, B-4, B-5
LLC2 parameters, B-6
Delay parameter, 3-55, 3-67
Deleting
adjacent link stations, 3-42
APPN connection network ports, 3-63
APPN connection networks, 3-60
APPN directory entries, 3-74
APPN interfaces, 3-17
APPN ports, 3-19
Dependent Logical Unit Requester. See DLUS

Automatic Activation parameter, 3-52

Dependent Logical Unit Requester. See DLUR

Automatic Network Routing (ANR), 1-18 to 1-19
fast packet switching, 1-18
session transparency, 1-18
source routing, 1-18

Directory services, 1-20

DLCI Address parameter, 2-5, 3-47
DLUR
operations, 1-6
sample network using, 1-7
DLUR Implicit LS Support parameter, 3-32

Backup DLUS Name parameter, 3-52

DLUR Support Enable/Disable parameter, 3-13

Bridge ID, assigning, 2-9

DLUR-DLUS RSCV Storage parameter, 3-14

Byte Cost parameter, 3-54, 3-66

DLUS
operations, 1-6
sample network using, 1-7

DSPU Name parameter, 3-39, 3-48
Cable Type parameter, 2-16

DSPU NO XID, 3-38

Clock Source parameter, 2-14

DSPU XID, 3-38

Configuration services, 1-21
Connection Cost parameter, 3-54, 3-65
Connection Network Name parameter, 3-60
Connection Network Port Name parameter, 3-60, 3-63
Connection networks, 1-10
Control points in APPN networks, 1-5
conventions, text, xiv
CP-CP Session Support parameter, 3-51

D
Data link connection identifier, 2-5, 3-21, 3-47
Default Backup DLUS Name parameter, 3-14
Default DLUS Name parameter, 3-13

303511-A Rev 00

E
Editing
advanced adjacent link station parameters, 3-49 to
3-57
APPN adjacent link stations, 3-35 to 3-57
APPN advanced connection networks parameters,
3-63 to 3-68
APPN advanced port parameters, 3-23 to 3-34
APPN connection network ports, 3-61 to 3-62
APPN connection networks, 3-57 to 3-68
APPN directory entries, 3-68 to 3-74
APPN global advanced parameters, 3-5 to 3-15
APPN global parameters, 3-3 to 3-5
APPN interfaces and ports, 3-15 to 3-34
APPN ports, 3-17 to 3-19

Index-3

educational services, xviii

Implicit User-Defined 2 parameter, 3-31

Effective Capacity parameter, 3-53, 3-65

Implicit User-Defined 3 parameter, 3-32, 3-68

Enable DLUR Support for this LS parameter, 3-39,
3-47

Inbound Link Activation Limits parameter, 3-26

Enable/Disable parameter, 3-36, 3-58, 3-62, 3-69

Interfaces, 1-9

Enabling
APPN over LLC2 interfaces, 2-2 to 2-7
APPN over LLC2 interfaces using SRB, 2-7 to 2-12
APPN over SDLC interfaces, 2-12 to 2-19

Intermediate Session Routing, 1-12 to 1-14
adaptive pacing, 1-13
packet segmentation and reassembly, 1-13

End nodes, 1-3
Endpoint Session RSCV Storage parameter, 3-7
Ethernet, 1-2

Interface Enable/Disable parameter, 3-17

Internal Clock Speed parameter, 2-15
Internal LAN ID, 2-9
ISR Congestion Threshold parameter, 3-11
ISR Decongestion Threshold parameter, 3-11
ISR Receive Pacing Window parameter, 3-12
ISR Session RSCV Storage parameter, 3-12

FDDI, 1-2
Frame Relay, 1-2

Limited Resource TG parameter, 3-51
Link Address (hex) parameter, 3-41

High Performance Routing (HPR), 1-14 to 1-19
Automatic Network Routing, 1-18
Rapid Transport Protocol, 1-16
HOST XID 0, 3-38
HOST XID 3, 3-38
HPR Implicit LS Support parameter, 3-32
HPR Path Switch Controller Support parameter, 3-15
HPR Support parameter, 3-15
HPR UI SAP parameter, 3-34

Link Deactivation parameter, 3-57
Link stations, 1-9
LLC Error Recovery Under HPR parameter, 3-33, 3-57
LLC2, enabling APPN over, 2-2 to 2-7
LLC2/SRB
enabling APPN over, 2-7 to 2-12
Local ID Block parameter, 3-5
Local ID Number parameter, 3-5
Local Link Station Role parameter, 3-19, 3-23
Local Node Name parameter, 2-4, 2-18, 3-4
Logical units (LUs) in APPN networks, 1-5

Implicit Byte Cost parameter, 3-30

low-entry networking nodes, 1-3

Implicit Connection Cost parameter, 3-29
Implicit CP Sessions parameter, 3-28
Implicit Delay parameter, 3-31
Implicit Effective Capacity parameter, 3-29
Implicit Limited Resource parameter, 3-28
Implicit Link Deactivation Time parameter, 3-33
Implicit Security parameter, 3-30
Implicit User-Defined 1 parameter, 3-31

Index-4

M
MAC Address parameter, 2-6, 3-46
Management services, 1-21
Max Cached Directory Entries parameter, 3-8
Max Directory Entries parameter, 3-8
Max I-Frame Window parameter, 3-26
Max NNs in Topology DB parameter, 3-10
303511-A Rev 00

Max Number of ISR Sessions parameter, 3-10

Resource Type parameter, 3-70, 3-73

Max Receive BTU Size parameter, 3-25

Route Addition Resistance parameter, 3-7

Max RU Size for ISR Sessions parameter, 3-12

RTS Enable parameter, 2-16

Max Send BTU Size parameter, 3-25, 3-41
Max TGs in Topology DB parameter, 3-10

S
SAP (hex) parameter, 2-6, 3-46
SDLC Address (hex) parameter, 2-19, 3-22, 3-46

Network Locate Timeout parameter, 3-9

SDLC, enabling APPN over, 2-12 to 2-19

network nodes, 1-3

Security parameter, 3-55, 3-66
Session services, 1-19

O
Outbound Link Activation Limits parameter, 3-27

P
packet segmentation and reassembly with ISR, 1-13
Parent Name parameter, 3-70, 3-73
Parent Type parameter, 3-71, 3-74
Point-to-Point (PPP) protocol, 1-2
Port Address parameter, 3-19
Port DLCI Address parameter, 3-21
Port Enable/Disable parameter, 3-18
Port MAC Address parameter, 3-22
Port Name parameter, 3-21, 3-36, 3-43
Port Number parameter, 3-21
Port SAP (hex) parameter, 3-22
Ports, 1-9

SMDS, 1-2
Source routing bridge
enabling APPN over LLC2 using, 2-7 to 2-12
Source Routing Ring Number parameter, 2-11
SR Bridge ID global parameter, 2-9
SR Bridge ID parameter, 2-9
SR Bridge Internal LAN ID parameter, 2-9
Source Routing Bridge (SRB), 1-2
Source Routing Ring Number parameter, 2-11
SR Bridge ID parameter, 2-9
SR Bridge Internal LAN ID parameter, 2-9
support, Bay Networks, xviii
Sync Line Coding parameter, 2-16
Synchronous parameters
Cable Type, 2-16
Clock Source, 2-14
Internal Clock Speed, 2-15
RTS Enable, 2-16
Sync Line Coding, 2-16

Primary DLUS Name parameter, 3-39, 3-48
product support, xviii
publications, Bay Networks, xvii

T
Target Pacing Count parameter, 3-42
technical publications, xvii
technical support, xviii

Rapid Transport Protocol (RTP), 1-16 to 1-17
end-to-end error recovery, 1-17
end-to-end flow and congestion control, 1-17
non-disruptive path switching, 1-16

Technician Interface, 2-1, 3-1

Related publications, 1-22

Token Ring, 1-2

Resource Name parameter, 3-72

Topology and route services, 1-20 to 1-21

303511-A Rev 00

text conventions, xiv
TG Number parameter, 3-51

Index-5

Total Link Activation Limits parameter, 3-26
TRS Route Tree Cache Size parameter, 3-9
TRS Route Tree Cache Usage Limit parameter, 3-9

U
Use Default TG Characteristics parameter, 3-53
User-Defined 1 parameter, 3-56, 3-67
User-Defined 2 parameter, 3-56, 3-67
User-Defined 3 parameter, 3-56

V
Virtual Ring Number parameter, 2-12

W
wildcards, using with directory entries, 3-68

Index-6

303511-A Rev 00

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.2
Linearized                      : No
Page Count                      : 150
Page Mode                       : UseOutlines
Create Date                     : 1998:09:22 10:37:55
Producer                        : Acrobat Distiller 3.01 for Windows
Creator                         : PSCRIPT.DRV Version 4.0
Title                           : V13.00, Configuring APPN Services
Author                          : BayRS Version 13.00
Subject                         : 303511-A Rev 00

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Avaya Configuing Appn Services Users Manual V13.00, Configuring

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