LLDP And LACP Statement
User Manual: HP (Hewlett-Packard) Switch 2300 User Guide |
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Alternative Features for Link Aggregation and Device Discovery
(End of Support for FEC and CDP)
Executive Summary
ProCurve Networking Business now recommends IEEE standards-based features for Link Aggregation and Device
Discovery. To this end, software updates for the products listed below, manufactured before December 2005, will
discontinue support for Cisco Systems' Fast EtherChannel (FEC) and Cisco Discovery Protocol (CDP)1:
■
Switch 2500 Series (all models)
■
Switch 4100gl Series (all models)
■
Switch 6108
■
Switch 2600 Series (all models, including PWR Series)2
■
Switch 2800 Series (all models)
■
Switch 5300xl Series (all models)
The Switch 3400cl/6400cl, Switch 8100fl Series, WAN and Wireless LAN devices do not support CDP and FEC.
In addition, new Switch Series models introduced after October 2005 will not offer support for FEC or CDP.
For aggregated links, use either 1) Link Aggregation Control Protocol (LACP) as defined in IEEE 802.3ad, or 2)
static trunks as defined by the ProCurve system software. ProCurve has performed interoperability testing using an
FEC-configured switch, then updating the switch to software that no longer supports this feature. The interoperability
testing shows that traffic continues to be load balanced across the trunk, although we highly recommend that the
other end of the trunk links be like configured (LACP or static).
For device discovery, use the Link Layer Discovery Protocol (LLDP), the IEEE 802.1ab standard, to provide for
device discovery for network management platforms and switch neighbor discovery.
Applicable Software Versions
The software versions that this change is applicable to are as follows (and all following versions):
Product
Last Version to support FEC/CDPa
First Version with no support for FEC/CDPb
Switch 2500 Series (all models)
F.05.40
F.05.50c
Switch 4100gl Series (all models)
G.07.78
G.07.79
Switch 6108
H.07.56
H.07.57
Switch 2600 Series (all models, including PWR)
H.08.76
H.08.77
Switch 2800 Series (all models)
I.08.73
I.08.74
Switch 5300xl Series (all models)
E.10.08
E.10.09
a. To download these last versions to support CDP/FEC, click on an active hyperlink for a version number.
b. To download the current version of code, click on an active hyperlink for the latest software updates.
c. 2500 Series transmits LLDP packets but does not support discovery of connected LLDP neighbor devices.
All bug fixes to Switch software will only be applied to the current versions.
1. Cisco and Fast EtherChannel are registered trademarks of Cisco Systems, Inc.
2. 2600-8-PWR (J8762A) never offered CDP or FEC support. This model was available Nov 1, 2005.
January 24, 2006
Actions to take prior to SW installation
To install the latest software on your ProCurve Switch, first verify that your existing configurations no longer use the
FEC feature and are using the supported alternatives, LACP or Static trunks.
Generally, aggregated links must be configured with the same type of configuration on both ends of the link
- LACP or static configuration ("trunk" option) for ProCurve devices.
Link Aggregation (ProCurve Trunk configurations)
If your switch configuration was working previously with the FEC connection to a switch or a server, it may continue
to work after this software update. ProCurve highly recommends that you reconfigure the other end of the link to
match either the LACP or static aggregated link configuration on the non-ProCurve equipment.
For your ProCurve switches, do the following:
1.
Prior to installation of the new software, verify that your configuration does not contain the following item:
trunk A1-A2 Trk1 fec
(where “A1-A2” is a listing of the ports to use in this group, and “Trk1” represents the Trunk name -Trk1, Trk2,
Trk3… ).
2.
Replace this configuration line with the following:
trunk A1-A2 Trk1 lacp
for an LACP Trunk
trunk A1-A2 Trk1 trunk
for a Static Trunk (no protocol)
or
3.
Ensure that the other end of the port aggregated link is similarly configured (for configuration instructions your
non-ProCurve equipment, refer to the appropriate product documentation):
•
use the “lacp” option for equipment that has support for LACP
•
use the “trunk” option for a switch or server at the other end that can configure the aggregated ports
statically (that is, uses no signaling protocol)
Device Discovery
For device discovery, the new software will enable LLDP by default (there will be no line item in the configuration
indicating that LLDP is enabled). All switch platforms listed on page 1 (with the exception of the 2500 Series) support
the transmission and reception of LLDP packets. The Switch 2500 Series only supports the transmission of LLDP
packets. The 2500 Series will not list any discovered neighbor switches.
For your ProCurve switches:
■
To disable LLDP operation, use the following command:
no lldp run
Some configurations may continue to provide limited read-only support for CDP. In configurations where you see
the command line, cdp run, this indicates that this switch will receive CDP information generated by neighbor
equipment. The LLDP MIB fields for connected device information will be populated with the respective information
received in a CDP packet.
■
To disable the receipt and processing of CDP information, use the following command:
no cdp run
2
January 24, 2006
FAQs
Why has ProCurve implemented this change?
ProCurve has discontinued the use of proprietary protocols for Link Aggregation and Device Discovery in order to
offer IEEE standard options for these features.
What happens if I install the new software and didn't change my configuration?
When the new software is rebooted and encounters
trunk [port list] [trk#] fec
in the configuration file, it will replace “fec” with the keyword “trunk”:
trunk [port list] [trk#] trunk
If the other end of the link is still configured for “fec” and worked previously with this ProCurve switch, the link may
continue to work and properly load balance traffic across the aggregated links. We recommend reconfiguring the
link on the other side for “static” operation.
ProCurve has tested this mismatched configuration with
■
ProCurve to ProCurve switches
■
ProCurve to Cisco Switches (and routers)
■
ProCurve to NIC-Teamed Servers
All configurations showed that load balancing continues to work across these grouped ports after an update to the
above listed versions of software. This testing was done on a finite set of configurations, so your environment may
require a manual reconfiguration of the aggregated link (that is, reconfigure your other switch or server to an LACP
or static trunk).
What are the ramifications of switching from CDP to LLDP?
Your ProCurve Networking products will be discovered by other interconnected ProCurve products. Devices that
continue to use CDP for discovery of neighboring devices may no longer see these ProCurve switches. For information
on enabling LLDP on your non-ProCurve equipment, refer to the appropriate product documentation.
ProCurve Manager (PCM) can use alternative methods to map the network and does not rely solely on CDP as a
discovery method to map your network topology.
© Copyright 2005 Hewlett-Packard Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products
and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting
an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.
Hewlett-Packard Company
8000 Foothills Boulevard, m/s 5552
Roseville, California 95747-5552
http://www.procurve.com
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