Comtrend WAP-5891U Wireless Router User Manual UM WR 6891u A1 0
Comtrend Corporation Wireless Router UM WR 6891u A1 0
  
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Contents
- 1. Manual-1
- 2. Manual-2
Manual-2

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6.4.3 Policy Routing 
This option allows for the configuration of static routes by policy.   
Click Add to create a routing policy or Remove to delete one. 
On the following screen, complete the form and click Apply/Save to create a policy. 
Field  Description 
Policy Name  Name of the route policy 
Physical LAN Port  Specify the port to use this route policy 
Source IP  IP Address to be routed 
Use Interface  Interface that traffic will be directed to 
Default Gateway IP  IP Address of the default gateway 

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6.4.4 RIP 
To activate RIP, configure the RIP version/operation mode and select the Enabled 
checkbox  for at least one WAN interface before clicking Save/Apply. 

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6.5 Interface Grouping 
Interface Grouping supports multiple ports to PVC and bridging groups. Each group 
performs as an independent network. To use this feature, you must create mapping 
groups with appropriate LAN and WAN interfaces using the Add button.   
The Remove button removes mapping groups, returning the ungrouped interfaces 
to the Default group. Only the default group has an IP interface. 
To add an Interface Group, click the Add button. The following screen will appear.   
It lists the available and grouped interfaces. Follow the instructions shown 
onscreen. 

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Automatically Add Clients With Following DHCP Vendor IDs: 
Add support to automatically map LAN interfaces to PVC's using DHCP vendor ID 
(option 60). The local DHCP server will decline and send the requests to a remote 
DHCP server by mapping the appropriate LAN interface. This will be turned on when 
Interface Grouping is enabled. 
For example, imagine there are 2 WAN services, an IPoE and a PPPoE. IPoE is for IP 
set-top box (video). The LAN interfaces are ETH1, ETH2, ETH3, and ETH4. 
The Interface Grouping configuration will be: 
1. Default: ETH1, ETH2, ETH3, and ETH4. 
2. Video: ipoe_eth0. The DHCP vendor ID is "Video". 

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If the onboard DHCP server is running on "Default" and the remote DHCP server is 
running on IPoE (i.e. for set-top box use only). LAN side clients can get IP addresses 
from the CPE's DHCP server and access the Internet via PPPoE . 
If a set-top box is connected to ETH1 and sends a DHCP request with vendor ID 
"Video", CPE will forward this request to the remote DHCP server. The Interface 
Grouping configuration will automatically change to the following: 
1. Default: ETH2, ETH3, and ETH4 
2. Video: ipoe_eth0, and ETH1. 

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6.6 IP Tunnel 
6.6.1 IPv6inIPv4 
Configure 6in4 tunneling to encapsulate IPv6 traffic over explicitly-configured IPv4 
links. 
Click the Add button to display the following. 
Options  Description 
Tunnel Name  Input a name for the tunnel
Mechanism  Mechanism used by the tunnel deployment 
Associated WAN Interface  Select the WAN interface to be used by the tunnel
Associated LAN Interface  Select the LAN interface to be included in the tunnel
Manual/Automatic  Select automatic for point-to-multipoint tunneling / 
manual for point-to-point tunneling 
IPv4 Mask Length  The subnet mask length used for the IPv4 interface
6rd Prefix with Prefix Length  Prefix and prefix length used for the IPv6 interface
Border Relay IPv4 Address   Input the IPv4 address of the other device 

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6.6.2 IPv4inIPv6 
Configure 4in6 tunneling to encapsulate IPv4 traffic over an IPv6-only environment. 
Click the Add button to display the following. 
Options  Description 
Tunnel Name  Input a name for the tunnel
Mechanism  Mechanism used by the tunnel deployment 
Associated WAN Interface  Select the WAN interface to be used by the tunnel
Associated LAN Interface  Select the LAN interface to be included in the tunnel
Manual/Automatic  Select automatic for point-to-multipoint tunneling / 
manual for point-to-point tunneling 
AFTR  Address of Address Family Translation Router 

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6.7 Certificate 
A certificate is a public key, attached with its owner’s information (company name, 
server name, personal real name, contact e-mail, postal address, etc) and digital 
signatures.    There will be one or more digital signatures attached to the certificate, 
indicating that these entities have verified that this certificate is valid. 
6.7.1 Local 
CREATE CERTIFICATE REQUEST 
Click Create Certificate Request to generate a certificate-signing request.   
The certificate-signing request can be submitted to the vendor/ISP/ITSP to apply for 
a certificate.    Some information must be included in the certificate-signing request.   
Your vendor/ISP/ITSP will ask you to provide the information they require and to 
provide the information in the format they regulate. Enter the required information 
and click Apply to generate a private key and a certificate-signing request.   
The following table is provided for your reference. 

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Field  Description 
Certificate Name  A user-defined name for the certificate. 
Common Name  Usually, the fully qualified domain name for the machine. 
Organization Name  The exact legal name of your organization.   
Do not abbreviate. 
State/Province Name  The state or province where your organization is located. 
It cannot be abbreviated. 
Country/Region Name  The two-letter ISO abbreviation for your country. 
IMPORT CERTIFICATE 
Click Import Certificate to paste the certificate content and the private key 
provided by your vendor/ISP/ITSP into the corresponding boxes shown below. 
Enter a certificate name and click the Apply button to import the certificate and its 
private key. 

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6.7.2 Trusted CA  
CA is an abbreviation for Certificate Authority, which is a part of the X.509 system.   
It is itself a certificate, attached with the owner information of this certificate 
authority; but its purpose is not encryption/decryption.    Its purpose is to sign and 
issue certificates, in order to prove that these certificates are valid. 
Click Import Certificate to paste the certificate content of your trusted CA.    The 
CA certificate content will be provided by your vendor/ISP/ITSP and is used to 
authenticate the Auto-Configuration Server (ACS) that the CPE will connect to. 
Enter a certificate name and click Apply to import the CA certificate. 

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6.8 Power Management 
This screen allows for control of hardware modules to evaluate power consumption.   
Use the buttons to select the desired option, click Apply and check the response. 

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6.9 Multicast 
Input new IGMP or MLD protocol configuration fields if you want modify default 
values shown. Then click Apply/Save. 
Field  Description 
Default Version  Define IGMP using version with video server. 
Query Interval  The query interval is the amount of time in seconds 
between IGMP General Query messages sent by the 
router (if the router is the querier on this subnet). The 
default query interval is 125 seconds. 
Query Response Interval  The query response interval is the maximum amount 
of time in seconds that the IGMP router waits to 
receive a response to a General Query message. The 
query response interval is the Maximum Response 
Time field in the IGMP v2 Host Membership Query 
message header. The default query response interval 
is 10 seconds and must be less than the query 
interval. 

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Field  Description 
Last Member Query 
Interval 
The last member query interval is the amount of time 
in seconds that the IGMP router waits to receive a 
response to a Group-Specific Query message. The last 
member query interval is also the amount of time in 
seconds between successive Group-Specific Query 
messages. The default last member query interval is 
10 seconds. 
Robustness Value  The robustness variable is a way of indicating how 
susceptible the subnet is to lost packets. IGMP can 
recover from robustness variable minus 1 lost IGMP 
packets. The robustness variable should be set to a 
value of 2 or greater. The default robustness variable 
value is 2. 
Maximum Multicast 
Groups 
Setting the maximum number of Multicast groups. 
Maximum Multicast Data 
Sources (for IGMPv3) 
Define the maximum multicast video stream number. 
Maximum Multicast 
Group Members 
Setting the maximum number of groups that ports 
can accept. 
Fast Leave Enable  When you enable IGMP fast-leave processing, the 
switch immediately removes a port when it detects an 
IGMP version 2 leave message on that port. 
LAN to LAN (Intra LAN) 
Multicast Enable 
This will activate IGMP snooping for cases where 
multicast data source and player are all located on the 
LAN side. 
Membership to join 
Immediate (IPTV)   
Enable IGMP immediate join feature for multicast 
membership group. 

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6.10 Wireless 
6.10.1 Basic 
The Basic option allows you to configure basic features of the wireless LAN interface. 
Among other things, you can enable or disable the wireless LAN interface, hide the 
network from active scans, set the wireless network name (also known as SSID) .
Click Apply/Save to apply the selected wireless options. 
Consult the table below for descriptions of these options. 
Option  Description 
Enable 
Wireless 
A checkbox  that enables or disables the wireless LAN interface.   
When selected, a set of basic wireless options will appear. 
Hide 
Access 
Point 
Select Hide Access Point to protect the access point from detection by 
wireless active scans. To check AP status in Windows XP, open 
Network Connections from the start Menu and select View 
Available Network Connections. If the access point is hidden, it 
will not be listed there. To connect a client to a hidden access point, 
the station must add the access point manually to its wireless 
configuration.   

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Option  Description 
Clients 
Isolation 
When enabled, it prevents client PCs from seeing one another in My 
Network Places or Network Neighborhood. Also, prevents one wireless 
client communicating with another wireless client. 
Disable 
WMM 
Advertise      
Stops the router from ‘advertising’ its Wireless Multimedia (WMM) 
functionality, which provides basic quality of service for time-sensitive 
applications (e.g. VoIP, Video). 
Enable 
Wireless 
Multicast 
Forwarding 
Select the checkbox  to enable this function. 
SSID 
[1-32 
characters] 
Sets the wireless network name. SSID stands for Service Set 
Identifier. All stations must be configured with the correct SSID to 
access the WLAN. If the SSID does not match, that user will not be 
granted access.   
BSSID  The BSSID is a 48-bit identity used to identify a particular BSS (Basic 
Service Set) within an area.    In Infrastructure BSS networks, the 
BSSID is the MAC (Media Access Control) address of the AP (Access 
Point); and in Independent BSS or ad hoc networks, the BSSID is 
generated randomly. 
Country 
US= worldwide
Max Clients  The maximum number of clients that can access the router. 
Wireless - 
Guest / 
Virtual 
Access 
Points 
This router supports multiple SSIDs called Guest SSIDs or Virtual 
Access Points. To enable one or more Guest SSIDs select the 
checkboxes  in the Enabled column. To hide a Guest SSID select its 
checkbox  in the Hidden column.   
Do the same for Isolate Clients and Disable WMM Advertise.  For 
a description of these two functions, see the previous entries for 
“Clients Isolation” and “Disable WMM Advertise”. Similarly, for Enable 
WMF, Max Clients and BSSID, consult the matching entries in this 
table. 
NOTE: Remote wireless hosts cannot scan Guest SSIDs. 

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6.10.2 Security 
The following screen appears when Wireless Security is selected. The options shown 
here allow you to configure security features of the wireless LAN interface. 
Please see 6.10.3 WPS for WPS setup instructions. 
Click Apply/Save to implement new configuration settings. 
WIRELESS SECURITY 
Setup requires that the user configure these settings using the Web User Interface 
(see the table below). 
Select SSID 
Select the wireless network name from the drop-down menu. SSID stands for 
Service Set Identifier.    All stations must be configured with the correct SSID to 
access the WLAN. If the SSID does not match, that client will not be granted access.
Network Authentication 
This option specifies whether a network key is used for authentication to the wireless
network.    If network authentication is set to Open, then no authentication is 
provided.    Despite this, the identity of the client is still verified.     
Each authentication type has its own settings.    For example, selecting 802.1X 
authentication will reveal the RADIUS Server IP address, Port and Key fields.    WEP
Encryption will also be enabled as shown below. 
Different authentication type pops up different settings requests. 
Choosing 802.1X, enter RADIUS Server IP address, RADIUS Port, RADIUS key and
Current Network Key. 

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Also, enable WEP Encryption and select Encryption Strength. 
Select the Current Network Key and enter 13 ASCII characters or 26 hexadecimal 
digits for 128-bit encryption keys and enter 5 ASCII characters or 10 hexadecimal 
digits for 64-bit encryption keys. 
Choosing WPA, you must enter WPA Group Rekey Interval.   
Choosing WPA-PSK, you must enter WPA Pre-Shared Key and Group Rekey 
Interval.   

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WEP Encryption 
This option specifies whether data sent over the network is encrypted. The same 
network key is used for data encryption and network authentication. Four network 
keys can be defined although only one can be used at any one time. Use the Current
Network Key list box to select the appropriate network key.   
Security options include authentication and encryption services based on the wired
equivalent privacy (WEP) algorithm.    WEP is a set of security services used to 
protect 802.11 networks from unauthorized access, such as eavesdropping; in this
case, the capture of wireless network traffic.     
When data encryption is enabled, secret shared encryption keys are generated and
used by the source station and the destination station to alter frame bits, thus 
avoiding disclosure to eavesdroppers. 
Under shared key authentication, each wireless station is assumed to have received
a secret shared key over a secure channel that is independent from the 802.11 
wireless network communications channel. 
Encryption Strength 
This drop-down list box will display when WEP Encryption is enabled.    The key 
strength is proportional to the number of binary bits comprising the key.    This 
means that keys with a greater number of bits have a greater degree of security and
are considerably more difficult to crack.    Encryption strength can be set to either 
64-bit or 128-bit.    A 64-bit key is equivalent to 5 ASCII characters or 10 
hexadecimal numbers.    A 128-bit key contains 13 ASCII characters or 26 
hexadecimal numbers.    Each key contains a 24-bit header (an initiation vector) 
which enables parallel decoding of multiple streams of encrypted data. 

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6.10.3 WPS 
Wi-Fi Protected Setup (WPS) is an industry standard that simplifies wireless security 
setup for certified network devices. Every WPS certified device has both a  PIN 
number and a push  button, located on th e device or accesse d through device 
software. The WR-6891u has a WPS button on the device. 
Devices with the WPS logo (shown here) 
support WPS. If the WPS logo is not present 
on your device it still may support WPS, in 
this case, c heck the device documentation 
for the phrase “Wi-Fi Protected Setup”. 
NOTE:  WPS is only  available in Open, WPA-PSK, WPA2-PSK and Mixed 
WPA2/WPA-PSK network authentication modes.  O ther authentication 
modes do not use WPS so they must be configured manually. 
To configure security settings with WPS, follow the procedures below. You must 
choose either the Push-Button or PIN configuration method for Steps 6 and 7. 
I. Setup 
Step 1:  Enable WPS by selecting Enabled from the drop down list box shown. 
Step 2:  Set the WPS AP Mode. Configured is used when the WR-6891u will 
assign security settings to clients. Unconfigured is used when an 
external client assigns security settings to the WR-6891u. 
NOTES:  Your client may or may not have the ability to provide security settings to 
the WR-6891u. If it does not, then you must set the WPS AP mode to 
Configured. Consult the device documentation to check its capabilities. 
  In addition, using Windows 7, you can add an external registrar using the 
Config AP button (Appendix F - WPS OPERATION has detailed 
instructions). 

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6.10.4 MAC Filter 
This option allows access to the router to be restricted based upon MAC addresses.   
To add a MAC Address filter, click the Add button shown below. To delete a filter, 
select it from the MAC Address table below and click the Remove button. 
Option  Description 
Select 
SSID 
Select the wireless network name from the drop-down menu. SSID 
stands for Service Set Identifier. All stations must be configured with the 
correct SSID to access the WLAN. If the SSID does not match, that user 
will not be granted access. 
MAC 
Restrict 
Mode 
Disabled: MAC filtering is disabled. 
Allow: Permits access for the specified MAC addresses. 
Deny: Rejects access for the specified MAC addresses. 
MAC 
Address 
Lists the MAC addresses subject to the MAC Restrict Mode. A maximum 
of 60 MAC addresses can be added. Every network device has a unique 
48-bit MAC address. This is usually shown as xx.xx.xx.xx.xx.xx, where 
xx are hexadecimal numbers.     
After clicking the Add button, the following screen appears.     

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Enter the MAC address in the box provided and click Apply/Save. 

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6.10.5 Wireless Bridge 
This screen allows for the configuration of wireless bridge features of the WIFI 
interface.    See the table beneath for detailed explanations of the various options. 
Click Apply/Save to implement new configuration settings.   
Feature  Description 
AP Mode  Selecting Wireless Bridge (aka Wireless Distribution System) 
disables Access Point (AP) functionality, while selecting Access 
Point enables AP functionality. In Access Point mode, wireless 
bridge functionality will still be available and wireless stations 
will be able to associate to the AP.     
Bridge Restrict  Selecting Disabled disables wireless bridge restriction, which 
means that any wireless bridge will be granted access.   
Selecting Enabled or Enabled (Scan) enables wireless bridge 
restriction. Only those bridges selected in the Remote Bridges 
list will be granted access. Click Refresh to update the station 
list when Bridge Restrict is enabled. 

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6.10.6 Advanced 
The Advanced screen allows you to configure advanced features of the wireless LAN 
interface. You can select a particular channel on which to operate, force the 
transmission rate to a particular speed, set the fragmentation threshold, set the RTS 
threshold, set the wakeup interval for clients in power-save mode, set the beacon 
interval for the access point, set XPress mode and set whether short or long 
preambles are used. Click Apply/Save to set new advanced wireless options. 
Field  Description 
Band  Set to 2.4 GHz for compatibility with IEEE 802.11x 
standards. The new amendment allows IEEE 802.11n units 
to fall back to slower speeds so that legacy IEEE 802.11x 
devices can coexist in the same network. IEEE 802.11g 
creates data-rate parity at 2.4 GHz with the IEEE 802.11a 
standard, which has a 54 Mbps rate at 5 GHz. (IEEE 
802.11a has other differences compared to IEEE 802.11b 
or g, such as offering more channels.) 
Channel  Drop-down menu that allows selection of a specific 
channel. 

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Field  Description 
Auto Channel Timer 
(min) 
Auto channel scan timer in minutes (0 to disable) 
802.11n/EWC  An equipment interoperability standard setting based on 
IEEE 802.11n Draft 2.0 and Enhanced Wireless Consortium 
(EWC) 
Bandwidth  Select 20MHz or 40MHz bandwidth. 40MHz bandwidth uses 
two adjacent 20MHz bands for increased data throughput.
Control Sideband  Select Upper or Lower sideband when in 40MHz mode. 
802.11n Rate  Set the physical transmission rate (PHY). 
802.11n Protection  Turn Off for maximized throughput.     
Turn On for greater security. 
Support 802.11n 
Client Only 
Turn Off to allow 802.11b/g clients access to the router. 
Turn On to prohibit 802.11b/g client’s access to the router.
RIFS Advertisement  One of several draft-n features designed to improve 
efficiency. Provides a shorter delay between OFDM 
transmissions than in802.11a or g. 
OBSS Co-Existence  Co-existence between 20 MHZ AND 40 MHZ overlapping 
Basic Service Set (OBSS) in WLAN. 
RX Chain Power Save  Enabling this feature turns off one of the Receive chains, 
going from 2x2 to 2x1 to save power. 
RX Chain Power Save 
Quiet Time 
The number of seconds the traffic must be below the PPS 
value below before the Rx Chain Power Save feature 
activates itself. 
RX Chain Power Save 
PPS 
The maximum number of packets per seconds that can be 
processed by the WLAN interface for a duration of Quiet 
Time, described above, before the Rx Chain Power Save 
feature activates itself. 
54g Rate  Drop-down menu that specifies the following fixed rates:   
Auto: Default.    Uses the 11 Mbps data rate when possible 
but drops to lower rates when necessary.    1 Mbps, 2Mbps, 
5.5Mbps, or 11Mbps fixed rates.    The appropriate setting 
is dependent on signal strength. 
Multicast Rate  Setting for multicast packet transmit rate (1-54 Mbps) 
Basic Rate  Setting for basic transmission rate. 
Fragmentation 
Threshold 
A threshold, specified in bytes, that determines whether 
packets will be fragmented and at what size.    On an 
802.11 WLAN, packets that exceed the fragmentation 
threshold are fragmented, i.e., split into, smaller units 
suitable for the circuit size.    Packets smaller than the 
specified fragmentation threshold value are not 
fragmented.    Enter a value between 256 and 2346. If you 
experience a high packet error rate, try to slightly increase 
your Fragmentation Threshold.    The value should remain 
at its default setting of 2346.  Setting the Fragmentation 
Threshold too low may result in poor performance. 

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Field  Description 
RTS Threshold  Request to Send, when set in bytes, specifies the packet 
size beyond which the WLAN Card invokes its RTS/CTS 
mechanism.  Packets that exceed the specified RTS 
threshold trigger the RTS/CTS mechanism.    The NIC 
transmits smaller packet without using RTS/CTS.    The 
default setting of 2347 (maximum length) disables RTS 
Threshold. 
DTIM Interval  Delivery Traffic Indication Message (DTIM) is also known as 
Beacon Rate.    The entry range is a value between 1 and 
65535. A DTIM is a countdown variable that informs clients 
of the next window for listening to broadcast and multicast 
messages.    When the AP has buffered broadcast or 
multicast messages for associated clients, it sends the next 
DTIM with a DTIM Interval value.    AP Clients hear the 
beacons and awaken to receive the broadcast and 
multicast messages.    The default is 1. 
Beacon Interval  The amount of time between beacon transmissions in 
milliseconds.    The default is 100 ms and the acceptable 
range is 1 – 65535.   The beacon transmissions identify the 
presence of an access point.   By default, network devices 
passively scan all RF channels listening for beacons coming 
from access points.    Before a station enters power save 
mode, the station needs the beacon interval to know when 
to wake up to receive the beacon (and learn whether there 
are buffered frames at the access point).     
Global Max Clients  The maximum number of clients that can connect to the 
router. 
Xpress TM Technology  Xpress Technology is compliant with draft specifications of 
two planned wireless industry standards. 
Transmit Power  Set the power output (by percentage) as desired. 
WMM (Wi-Fi 
Multimedia) 
The technology maintains the priority of audio, video and 
voice applications in a Wi-Fi network. It allows multimedia 
service get higher priority. 
WMM No 
Acknowledgement 
Refers to the acknowledge policy used at the MAC level. 
Enabling no Acknowledgement can result in more efficient 
throughput but higher error rates in a noisy Radio 
Frequency (RF) environment. 
WMM APSD  This is Automatic Power Save Delivery. It saves power. 

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Chapter 7 Diagnostics 
You can reach this page by clicking on the following icon located at the top of the 
screen. 
7.1 Diagnostics – Individual Tests 
The first Diagnostics screen is a dashboard that shows overall connection status.   
Click the Diagnostics Menu item on the left side of the screen to display the 
individual connections. 

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7.2 Fault Management 
Item   Description 
Maintenance Domain (MD) Level  Management space on the network, the 
larger the domain, the higher the level 
value
Destination MAC Address  Destination MAC address for sending the 
loopback message
802.1Q VLAN ID: [0-4095]  802.1Q VLAN used in VDSL PTM mode
Set MD Level 
Save the Maintenance domain level. 
Send Loopback 
Send loopback message to destination MAC address. 
Send Linktrace 
Send traceroute message to destination MAC address. 

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7.3 Uptime Status 
This page shows System, DSL, ETH and Layer 3 uptime. If the DSL line, ETH or Layer 
3 connection is down, the uptime will stop incrementing. If the service is restored, 
the counter will reset and start from 0. A Bridge interface will follow the DSL or ETH 
timer. 
The "ClearAll" button will restart the counters from 0 or show "Not Connected" if the 
interface is down. 
7.4 Ping 
Input the IP address/hostname and click the Ping button to execute ping diagnostic 
test to send the ICMP request to the specified host. 

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7.5 Trace Route 
Input the IP address/hostname and click the TraceRoute button to execute the 
trace route diagnostic test to send the ICMP packets to the specified host. 

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7.6 System Utilization 
Click "Start" button to initialize CPU and Memory utilization calculation. 
Please wait 10 seconds for the test to run. 

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Chapter 8 Management 
You can reach this page by clicking on the following icon located at the top of the 
screen. 
The Management menu has the following maintenance functions and processes: 
8.1 Settings 
This includes Backup Settings, Update Settings, and Restore Default screens. 
8.1.1 Backup Settings  
To save the current configuration to a file on your PC, click Backup Settings.  You 
will be prompted for backup file location. This file can later be used to recover 
settings on the Update Settings screen, as described below. 

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8.1.2 Update Settings 
This option recovers configuration files previously saved using Backup Settings.  
Enter the file name (including folder path) in the Settings File Name box, or press 
Browse… to search for the file, then click Update Settings to recover settings. 
8.1.3 Restore Default 
Click Restore Default Settings to restore factory default settings. 
After Restore Default Settings is clicked, the following screen appears.   
Close the browser and wait for 2 minutes before reopening it. It may also be 
necessary, to reconfigure your PC IP configuration to match any new settings. 
NOTE:    This entry has the same effect as the Reset button. The WR-6891u board 
hardware and the boot loader support the reset to default. If the Reset 
button is continuously pressed for more than 10 seconds, the boot loader 
will erase the configuration data saved in flash memory. 

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8.2 System Log 
This function allows a system log to be kept and viewed upon request.    
Follow the steps below to configure, enable, and view the system log. 
STEP 1:  Click Configure System Log, as shown below (circled in Red). 
STEP 2:  Select desired options and click Apply/Save. 
Consult the table below for detailed descriptions of each system log option. 
Option  Description 
Log   Indicates whether the system is currently recording events.    The user 
can enable or disable event logging.    By default, it is disabled.    To 
enable it, select the Enable radio button and then click Apply/Save.  

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Option  Description 
Log 
Level 
Allows you to configure the event level and filter out unwanted events 
below this level.    The events ranging from the highest critical level 
“Emergency” down to this configured level will be recorded to the log 
buffer on the WR-6891u SDRAM.    When the log buffer is full, the newer 
event will wrap up to the top of the log buffer and overwrite the old event. 
By default, the log level is “Debugging”, which is the lowest critical level. 
The log levels are defined as follows: 
•  Emergency = system is unusable 
•  Alert = action must be taken immediately 
•  Critical = critical conditions 
•  Error = Error conditions 
•  Warning = normal but significant condition 
•  Notice= normal but insignificant condition 
•  Informational= provides information for reference 
•  Debugging = debug-level messages 
Emergency is the most serious event level, whereas Debugging is the 
least important.    For instance, if the log level is set to Debugging, all the 
events from the lowest Debugging level to the most critical level 
Emergency level will be recorded.    If the log level is set to Error, only 
Error and the level above will be logged. 
Display 
Level 
Allows the user to select the logged events and displays on the View 
System Log window for events of this level and above to the highest 
Emergency level. 
Mode  Allows you to specify whether events should be stored in the local 
memory, or be sent to a remote system log server, or both 
simultaneously.    If remote mode is selected, view system log will not be 
able to display events saved in the remote system log server.     
When either Remote mode or Both mode is configured, the WEB UI will 
prompt the user to enter the Server IP address and Server UDP port. 
STEP 3:  Click View System Log.    The results are displayed as follows. 

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8.3 SNMP Agent 
Simple Network Management Protocol (SNMP) allows a management application to 
retrieve statistics and status from the SNMP agent in this device.    Select the 
Enable radio button, configure options, and click Save/Apply to activate SNMP. 

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8.4 TR-069 Client 
WAN Management Protocol (TR-069) allows an Auto-Configuration Server (ACS) to 
perform auto-configuration, provision, collection, and diagnostics to this device.   
Select desired values and click Apply/Save to configure TR-069 client options. 
The table below is provided for ease of reference. 
Option  Description 
Enable TR-069  Tick the checkbox  to enable. 
OUI-serial  The serial number used to identify the CPE when making a 
connection to the ACS using the CPE WAN Management 
Protocol.   Select MAC to use the router’s MAC address as 
serial number to authenticate with ACS or select serial 
number to use router’s serial number. 
Inform  Disable/Enable TR-069 client on the CPE. 
Inform Interval  The duration in seconds of the interval for which the CPE 
MUST attempt to connect with the ACS and call the Inform 
method. 
ACS URL  URL for the CPE to connect to the ACS using the CPE WAN 
Management Protocol. This parameter MUST be in the form 
of a valid HTTP or HTTPS URL. An HTTPS URL indicates that 
the ACS supports SSL. The “host” portion of this URL is 
used by the CPE for validating the certificate from the ACS 
when using certificate-based authentication. 

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Option  Description 
ACS User Name  Username used to authenticate the CPE when making a 
connection to the ACS using the CPE WAN Management 
Protocol. This username is used only for HTTP-based 
authentication of the CPE. 
ACS Password  Password used to authenticate the CPE when making a 
connection to the ACS using the CPE WAN Management 
Protocol. This password is used only for HTTP-based 
authentication of the CPE. 
WAN Interface used 
by TR-069 client 
Choose Any_WAN, LAN, Loopback or a configured 
connection. 
Connection Request 
Authentication    Tick the checkbox  to enable. 
User Name  Username used to authenticate an ACS making a 
Connection Request to the CPE. 
Password  Password used to authenticate an ACS making a 
Connection Request to the CPE. 
URL  IP address and port the ACS uses to connect to router. 
The Send Inform button forces the CPE to establish an immediate connection to 
the ACS. 

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8.5 Internet Time 
This option automatically synchronizes the router time with Internet timeservers.   
To enable time synchronization, tick the corresponding checkbox , choose your 
preferred time server(s), select the correct time zone offset, and click Save/Apply. 
NOTE:  Internet Time must be activated to use 5.5 Parental Control.  
In addition, this menu item is not displayed when in Bridge mode since 
the router would not be able to connect to the NTP timeserver. 

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8.6 Access Control 
8.6.1 Passwords 
This screen is used to configure the user account access passwords for the device.   
Access to the WR-6891u is controlled through the following user accounts: 
• The root account has unrestricted access to view and change the 
configuration of your Broadband router. 
• The support account is typically utilized by Carrier/ISP technicians for 
maintenance and diagnostics. 
• The user account is typically utilized by End-Users to view configuration 
settings and statistics, with limited ability to configure certain settings. 
• The apuser account is typically utilized by End-Users to view configuration 
settings and statistics, with limited ability to configure wireless settings. 
Use the fields to update passwords for the accounts, add/remove accounts (max of 
5 accounts) as well as adjust their specific privileges.   

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Note: Passwords may be as long as 16 characters but must not contain a space. 
Click Save/Apply to continue. 

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8.6.2  Service Access 
The Services option limits or opens the access services over the LAN or WAN.   
These access services available are: FTP, HTTP, ICMP, SNMP, TELNET and TFTP.   
Enable a service by selecting its dropdown listbox.    Click APPLY/SAVE to activate. 

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 8.6.3  IP Address 
The IP Address Access Control mode, if enabled, permits access to local 
management services from IP addresses contained in the Access Control List. If the 
Access Control mode is disabled, the system will not validate IP addresses for 
incoming packets. The services are the system applications listed in the Service 
Control List beside ICMP. 
Click the Add button to display the following. 
Configure the address and subnet of the management station permitted to access 
the local management services, and click Save/Apply. 
IP Address – IP address of the management station. 
Subnet Mask – Subnet address for the management station. 
Interface – Access permission for the specified address, allowing the address to 
access the local management service from none/lan/wan/lan&wan interfaces. 

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8.7 Update Software 
This option allows for firmware upgrades from a locally stored file. 
STEP 1:  Obtain an updated software image file from your ISP. 
STEP 2:   Select the configuration from the drop-down menu. 
Configuration options:  
No change – upgrade software directly. 
Erase current config – If the router has save_default configuration, this option will 
erase the current configuration and restore to save_default configuration after 
software upgrade. 
Erase All – Router will be restored to factory default configuration after software 
upgrade. 
STEP 3:    Enter the path and filename of the firmware image file in the Software 
File Name field or click the Browse button to locate the image file. 
STEP 4:  Click the Update Software button once to upload and install the file. 
NOTE:    The update process will take about 2 minutes to complete.    The device 
will reboot and the browser window will refresh to the default screen upon 
successful installation. It is recommended that you compare the 
Software Version on the Device Information screen with the firmware 
version installed, to confirm the installation was successful.     

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8.8 Reboot 
To save the current configuration and reboot the router, click Save/Reboot.  
NOTE:  You may need to close the browser window and wait for 2 minutes before 
reopening it. It may also be necessary, to reset your PC IP configuration. 

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Chapter 9 Logout 
To log out from the device simply click the following icon located at the top of your 
screen. 
When the following window pops up, click the OK button to exit the router. 
Upon successful exit, the following message will be displayed. 

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Appendix A - Firewall 
STATEFUL PACKET INSPECTION 
Refers to an architecture, where the firewall keeps track of packets on each 
connection traversing all its interfaces and makes sure they are valid. This is in 
contrast to static packet filtering which only examines a packet based on the 
information in the packet header. 
DENIAL OF SERVICE ATTACK 
Is an incident in which a user or organization is deprived of the services of a 
resource they would normally expect to have. Various DoS attacks the device can 
withstand are ARP Attack, Ping Attack, Ping of Death, Land, SYN Attack, Smurf 
Attack, and Tear Drop. 
TCP/IP/PORT/INTERFACE FILTER 
These rules help in the filtering of traffic at the Network layer (i.e. Layer 3). 
When a Routing interface is created, Enable Firewall must be checked. 
Navigate to Advanced Setup  Security  IP Filtering. 
OUTGOING IP FILTER 
Helps in setting rules to DROP packets from the LAN interface. By default, if the 
Firewall is Enabled, all IP traffic from the LAN is allowed. By setting up one or more 
filters, specific packet types coming from the LAN can be dropped. 
    Example 1:  Filter Name      : Out_Filter1 
Protocol    : TCP 
Source IP address    : 192.168.1.45 
Source Subnet Mask  : 255.255.255.0 
Source Port      : 80 
Dest. IP Address    : NA 
Dest. Subnet Mask   : NA 
Dest. Port      : NA 
This filter will Drop all TCP packets coming from the LAN with IP 
Address/Subnet Mask of 192.168.1.45/24 having a source port of 80 
irrespective of the destination. All other packets will be Accepted. 
Example 2:  Filter Name      : Out_Filter2 
Protocol    : UDP 
Source IP Address    : 192.168.1.45 
Source Subnet Mask  : 255.255.255.0 
Source Port      : 5060:6060 
Dest. IP Address    : 172.16.13.4 
Dest. Subnet Mask   : 255.255.255.0 
Dest. Port      : 6060:7070 
This filter will drop all UDP packets coming from the LAN with IP Address / 
Subnet Mask of 192.168.1.45/24 and a source port range of 5060 to 6060, 
destined to 172.16.13.4/24 and a destination port range of 6060 to 7070. 
INCOMING IP FILTER 
Helps in setting rules to Allow or Deny packets from the WAN interface. By default, 
all incoming IP traffic from the WAN is Blocked, if the Firewall is Enabled. By setting 
up one or more filters, specific packet types coming from the WAN can be Accepted. 

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Example 1:  Filter Name      : In_Filter1 
Protocol    : TCP 
Policy    : Allow 
Source IP Address    : 210.168.219.45 
Source Subnet Mask  : 255.255.0.0 
Source Port      : 80 
Dest. IP Address    : NA 
Dest. Subnet Mask   : NA 
Dest. Port      : NA 
Selected WAN interface : br0 
This filter will ACCEPT all TCP packets coming from WAN interface “br0” with IP 
Address/Subnet Mask 210.168.219.45/16 with a source port of 80, irrespective 
of the destination. All other incoming packets on this interface are DROPPED. 
Example 2:  Filter Name      : In_Filter2 
Protocol    : UDP 
Policy    : Allow 
Source IP Address    : 210.168.219.45 
Source Subnet Mask  : 255.255.0.0 
Source Port      : 5060:6060 
Dest. IP Address    : 192.168.1.45 
Dest. Sub. Mask    : 255.255.255.0 
Dest. Port      : 6060:7070 
Selected WAN interface : br0 
This rule will ACCEPT all UDP packets coming from WAN interface “br0” with IP 
Address/Subnet Mask 210.168.219.45/16 and a source port in the range of 
5060 to 6060, destined to 192.168.1.45/24 and a destination port in the range 
of 6060 to 7070. All other incoming packets on this interface are DROPPED.   
MAC LAYER FILTER 
These rules help in the filtering of Layer 2 traffic. MAC Filtering is only effective in 
Bridge mode. After a Bridge mode connection is created, navigate to Advanced 
Setup  Security  MAC Filtering in the WUI. 
Example 1:  Global Policy      : Forwarded 
Protocol Type      : PPPoE 
Dest. MAC Address   : 00:12:34:56:78:90 
Source MAC Address  : NA 
Src. Interface     : eth1 
Dest. Interface    : eth2 
Addition of this rule drops all PPPoE frames going from eth1 to eth2 with a 
Destination MAC Address of 00:12:34:56:78:90 irrespective of its Source MAC 
Address. All other frames on this interface are forwarded. 
Example 2:  Global Policy      : Blocked 
Protocol Type      : PPPoE 
Dest. MAC Address   : 00:12:34:56:78:90 
Source MAC Address  : 00:34:12:78:90:56 
Src. Interface     : eth1 
Dest. Interface    : eth2 

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Addition of this rule forwards all PPPoE frames going from eth1 to eth2 with a 
Destination MAC Address of 00:12:34:56:78 and Source MAC Address of 
00:34:12:78:90:56. All other frames on this interface are dropped. 
DAYTIME PARENTAL CONTROL 
This feature restricts access of a selected LAN device to an outside Network through 
the WR-6891u , as per chosen days of the week and the chosen times. 
Example:  User Name      : FilterJohn 
Browser's MAC Address : 00:25:46:78:63:21 
Days of the Week    : Mon, Wed, Fri 
Start Blocking Time  : 14:00 
End Blocking Time   : 18:00 
With this rule, a LAN device with MAC Address of 00:25:46:78:63:21 will have 
no access to the WAN on Mondays, Wednesdays, and Fridays, from 2pm to 6pm. 
On all other days and times, this device will have access to the outside 
Network. 

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Appendix B - Pin Assignments 
Signals for ETHERNET WAN port (10/1001000Base-T) 
Pin Signal name Signal definition 
1  TRD+(0)  Transmit/Receive data 0 (positive lead) 
2  TRD-(0)  Transmit/Receive data 0 (negative lead) 
3  TRD+(1)  Transmit/Receive data 1 (positive lead) 
4  TRD+(2)  Transmit/Receive data 2 (positive lead) 
5  TRD-(2)  Transmit/Receive data 2 (negative lead) 
6  TRD-(1)  Transmit/Receive data 1 (negative lead) 
7  TRD+(3)  Transmit/Receive data 3 (positive lead) 
8  TRD-(3)  Transmit/Receive data 3 (negative lead) 

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Appendix C – Specifications 
Hardware Interface 
RJ-45 X 4 for LAN GB Ports, RJ-45 X 1 for WAN GB Port, (10/100/1000 BaseT 
auto-sense), Reset Button X 1, WPS/WiFi on/off button x1, Power Switch X 1, 
Wi-Fi Antennas X 2, USB Host X 1 
Gigabit Ethernet WAN 
        10/100/1000 Mbps 
       RJ45 connector 
LAN Interface 
 Standard ..................... IEEE 802.3, IEEE 802.3u  
 MDI/MDX support ......... Yes 
         Multiple Subnets on LAN 
Wireless Interface 
Standard  ................... IEEE802.11b/g 
Encryption................... 64/128-bit Wired Equivalent Privacy (WEP) 
Channels ..................... 11 (US, Canada)/ 13 (Europe)/ 14 (Japan) 
Data Rate ................... Up to 300Mbps 
WPA ...........................  Yes  
WPA2 ......................... Yes 
IEEE 802.1x ................ Yes 
Management 
Compliant with TR-069/TR-098/TR-111/TR-143 remote management 
protocols, Telnet, Web-based management, Configuration backup and 
restoration, Software upgrade via HTTP / TFTP / FTP server 
Bridge Functions 
  Transparent bridging and learning ............ Yes  
 VLAN support ....................................... Yes 
  Spanning Tree Algorithm ........................ Yes 
 IGMP Proxy .......................................... Yes 
Routing Functions 
Static route, RIP v1/v2, DHCP Server/Client/Relay, DNS Proxy, ARP, RARP, SNTP 
Security Functions 
Authentication protocols: PAP, CHAP 
Packet and MAC address filtering, IPSec termination, Three level login 
including local admin, local user and remote technical support access 

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QoS    
         Packet level QoS classification rules,   
         IP TOS/Precedence,  
         802.1p marking,  
       DiffServ DSCP marking  
       Src/dest MAC addresses classification 
Application Layer Gateway 
FTP, SIP, H.323, RTSP, L2TP, Yahoo messenger, ICQ, RealPlayer, Net2Phone, 
NetMeeting, MSN, X-box, Microsoft DirectX games 
Power Supply ............................................... Input:  100 - 240 Vac   
  Output:  12 Vdc / 1A 
Environment Condition 
 Operating temperature ........................... 0 ~ 40 degrees Celsius          
  Relative humidity .................................. 5 ~ 95% (non-condensing)     
Dimensions .................................... 206 mm (W) x 46 mm (H) x 160 mm (D) 
Kit Weight 
(1*WR-6891u, 1*RJ14 cable, 2*RJ45 cable, 1*power adapter) = 0.6 kg 
NOTE:   Specifications are subject to change without notice 

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Appendix D - SSH Client 
Unlike Microsoft Windows, Linux OS has a ssh client included.    For Windows users, 
there is a public domain one called “putty” that can be downloaded from here: 
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html 
To access the ssh client you must first enable SSH access for the LAN or WAN from 
the Management  Access Control  Services menu in the web user interface.     
To access the router using the Linux ssh client   
For LAN access, type: ssh -l root 192.168.1.1 
For WAN access, type: ssh -l support WAN IP address 
To access the router using the Windows “putty” ssh client 
For LAN access, type: putty -ssh -l root 192.168.1.1 
For WAN access, type: putty -ssh -l support WAN IP address 
NOTE:  The WAN IP address can be found on the Device Info  WAN screen     

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Appendix E - Connection Setup 
Creating a WAN connection is a two-stage process. 
 1 - Setup a Layer 2 Interface   
 2 - Add a WAN connection to the Layer 2 Interface. 
The following sections describe each stage in turn. 
E1 ~ Layer 2 Interface 
Every layer2 interface operates in Multi-Service Connection (VLAN MUX) mode, 
which supports multiple connections over a single interface. Note that PPPoA and 
IPoA connection types are not supported for Ethernet WAN interfaces. After adding 
WAN connections to an interface, you must also create an Interface Group to 
connect LAN/WAN interfaces.   

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 ETHERNET Interfaces 
Follow these procedures to configure a PTM interface.     
STEP 1:  Go to Basic Setup    WAN Setup  Select ETHERNET Interface 
from the drop-down menu. 
This table is provided here for ease of reference. 
Heading  Description 
Interface/ (Name)  WAN interface name. 
Connection Mode  Default Mode – Single service over one interface. 
Vlan Mux Mode – Multiple Vlan services over one interface. 
Remove  Select interfaces to remove. 
STEP 2:  Click Add to proceed to the next screen.   

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STEP 3:  Select an Ethernet port and Click Apply/Save to confirm your choices. 
On the next screen, check that the ETHERNET interface is added to the list.   
Note: A new parameter will be added to the screen: 
Select WAN media type to apply: Select from the drop-down menu and click the 
Apply button. 

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E2 ~ WAN Connections 
The WR-6891u supports one WAN connection for each interface, up to a maximum 
of 16 connections. 
To setup a WAN connection follow these instructions. 
Note: Before you start, it is necessary to select the WAN media type from the 
drop-down menu and click the Apply button. 
STEP 1:  Go to Basic Setup    WAN Setup. 
Note: 
PPP Redirect: if enabled (i.e. the enable radio button is selected) the function 
would make an ISP Login Failed window pop up (shown below) if the user logged in 
with an invalid PPP password while trying to surfing the web. 
You must reboot the router to make the new configuration effective. 

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STEP 2:  Click Add to create a WAN connection. The following screen will display. 
STEP 3:  Choose a layer 2 interface from the drop-down menu and click Next.  
The WAN Service Configuration screen will display as shown below. 
NOTE:  The WAN services shown here are those supported by the layer 2 
interface you selected in the previous step. If you wish to change your 
selection click the Back button and select a different layer 2 interface. 

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STEP 4:  For VLAN Mux Connections only, you must enter Priority & VLAN ID tags. 
STEP 5:  You will now follow the instructions specific to the WAN service type you 
wish to establish. This list should help you locate the correct procedure: 
(1) For PPP over ETHERNET (PPPoE), go to page 139. 
(2) For IP over ETHERNET (IPoE), go to page 144. 
(3) For Bridging, go to page 148. 
The subsections that follow continue the WAN service setup procedure.     

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E2.1 PPP over ETHERNET (PPPoE) 
STEP 1:  Select the PPP over Ethernet radio button and click Next. You can also 
enable IPv6 by ticking the checkbox  at the bottom of this screen. 
STEP 2:  On the next screen, enter the PPP settings as provided by your ISP.   
Click Next to continue or click Back to return to the previous step. 

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The settings shown above are described below. 
PPP SETTINGS 
The PPP Username, PPP password and the PPPoE Service Name entries are 
dependent on the particular requirements of the ISP.    The user name can be a 
maximum of 256 characters and the password a maximum of 32 characters in 
length. For Authentication Method, choose from AUTO, PAP, CHAP, and MSCHAP. 

141
ENABLE FULLCONE NAT 
This option becomes available when NAT is enabled. Known as one-to-one NAT, all 
requests from the same internal IP address and port are mapped to the same 
external IP address and port. An external host can send a packet to the internal host, 
by sending a packet to the mapped external address. 
DIAL ON DEMAND 
The WR-6891u can be configured to disconnect if there is no activity for a period of 
time by selecting the Dial on demand checkbox .    You must also enter an 
inactivity timeout period in the range of 1 to 4320 minutes.     
PPP IP EXTENSION 
The PPP IP Extension is a special feature deployed by some service providers.   
Unless your service provider specifically requires this setup, do not select it. 
  PPP IP Extension does the following: 
•  Allows only one PC on the LAN. 
•  Disables NAT and Firewall. 
•  The device becomes the default gateway and DNS server to the PC 
through DHCP using the LAN interface IP address. 
•  The device extends the IP subnet at the remote service provider to the 
LAN PC.    i.e. the PC becomes a host belonging to the same IP subnet. 
•  The device bridges the IP packets between WAN and LAN ports, unless 
the packet is addressed to the device’s LAN IP address. 
•  The public IP address assigned by the remote side using the PPP/IPCP 
protocol is actually not used on the WAN PPP interface.    Instead, it is 
forwarded to the PC LAN interface through DHCP.    Only one PC on the 
LAN can be connected to the remote, since the DHCP server within the 
device has only a single IP address to assign to a LAN device. 
ENABLE NAT 
If the LAN is configured with a private IP address, the user should select this 
checkbox . The NAT submenu will appear in the Advanced Setup menu after reboot.   
On the other hand, if a private IP address is not used on the LAN side (i.e. the LAN 
side is using a public IP), this checkbox  should not be selected to free up system 
resources for better performance.     
ENABLE FIREWALL 
If this checkbox  is selected, the Security submenu will be displayed on the 
Advanced Setup menu after reboot. If firewall is not necessary, this checkbox  
should not be selected to free up system resources for better performance.     
USE STATIC IPv4 ADDRESS 
Unless your service provider specially requires it, do not select this checkbox .  If 
selected, enter the static IP address in the IPv4 Address field.   
Don’t forget to adjust the IP configuration to Static IP Mode as described in section 
3.2. 

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FIXED MTU 
Maximum Transmission Unit. The size (in bytes) of largest protocol data unit which 
the layer can pass onwards.   
ENABLE PPP DEBUG MODE 
When this option is selected, the system will put more PPP connection information 
into the system log.    This is for debugging errors and not for normal usage. 
BRIDGE PPPOE FRAMES BETWEEN WAN AND LOCAL PORTS  
(This option is hidden when PPP IP Extension is enabled) 
When Enabled, this creates local PPPoE connections to the WAN side. Enable this 
option only if all LAN-side devices are running PPPoE clients, otherwise disable it.   
The WR-6891u supports pass-through PPPoE sessions from the LAN side while 
simultaneously running a PPPoE client from non-PPPoE LAN devices.   
ENABLE IGMP MULTICAST PROXY 
Tick the checkbox  to enable Internet Group Membership Protocol (IGMP) 
multicast. This protocol is used by IPv4 hosts to report their multicast group 
memberships to any neighboring multicast routers. 
NO MULTICAST VLAN FILTER  
Tick the checkbox  to Enable/Disable multicast VLAN filter. 
Enable WAN interface with base MAC  
Enable this option to use the router’s base MAC address as the MAC address for this 
WAN interface. 
STEP 3:  Choose an interface to be the default gateway. 
Click Next to continue or click Back to return to the previous step. 

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Select DNS Server Interface from available WAN interfaces OR enter static DNS 
server IP addresses for the system. In ATM mode, if only a single PVC with a static 
IPoE protocol is configured, Static DNS server IP addresses must be entered. 
Click Next to continue or click Back to return to the previous step. 
STEP 5:  The WAN Setup - Summary screen shows a preview of the WAN service 
you have configured. Check these settings and click Apply/Save if they 
are correct, or click Back to modify them. 
After clicking Apply/Save, the new service should appear on the main screen.   

144
E2.2 IP over ETHERNET (IPoE) 
STEP 1:  *Select the IP over Ethernet radio button and click Next. 
* 
For tagged service, enter valid 802.1P Priority and 802.1Q VLAN ID. 
For untagged service, set -1 to both 802.1P Priority and 802.1Q VLAN ID.
STEP 2:  The WAN IP settings screen provides access to the DHCP server settings.     
  You can select the Obtain an IP address automatically radio button to 
enable DHCP (use the DHCP Options only if necessary). However, if you 
prefer, you can instead use the Static IP address method to assign WAN 
IP address, Subnet Mask and Default Gateway manually. 

145
NOTE:  If IPv6 networking is enabled, an additional set of instructions, radio 
buttons, and text entry boxes will appear at the bottom of the screen.   
These configuration options are quite similar to those for IPv4 networks.
Click Next to continue or click Back to return to the previous step. 
STEP 3:  This screen provides access to NAT, Firewall and IGMP Multicast settings. 
Enable each by selecting the appropriate checkbox . Click Next to 
continue or click Back to return to the previous step. 
ENABLE NAT 
If the LAN is configured with a private IP address, the user should select this 
checkbox .    The NAT submenu will appear in the Advanced Setup menu after 
reboot.    On the other hand, if a private IP address is not used on the LAN side (i.e. 
the LAN side is using a public IP), this checkbox  should not be selected, so as to 
free up system resources for improved performance. 
ENABLE FULLCONE NAT   
This option becomes available when NAT is enabled. Known as one-to-one NAT, all 
requests from the same internal IP address and port are mapped to the same 
external IP address and port. An external host can send a packet to the internal host, 
by sending a packet to the mapped external address. 
ENABLE FIREWALL 
If this checkbox  is selected, the Security submenu will be displayed on the 
Advanced Setup menu after reboot.    If firewall is not necessary, this checkbox  
should not be selected so as to free up system resources for better performance.     
ENABLE IGMP MULTICAST 
Tick the checkbox  to enable Internet Group Membership Protocol (IGMP) 
multicast.    IGMP is a protocol used by IPv4 hosts to report their multicast group 
memberships to any neighboring multicast routers.   

146
Enable WAN interface with base MAC  
Enable this option to use the router’s base MAC address as the MAC address for this 
WAN interface. 
STEP 4:  To choose an interface to be the default gateway. 
Click Next to continue or click Back to return to the previous step.   
STEP 5:  Select DNS Server Interface from available WAN interfaces OR enter static 
DNS server IP addresses for the system. In ATM mode, if only a single PVC with a 
static IPoE protocol is configured, Static DNS server IP addresses must be entered. 

147
If IPv6 is enabled, an additional set of options will be shown.   
IPv6: Select the configured WAN interface for IPv6 DNS server information OR enter 
the static IPv6 DNS server Addresses. 
Note that selecting a WAN interface for IPv6 DNS server will enable DHCPv6 Client 
on that interface. 
Click Next to continue or click Back to return to the previous step. 
STEP 6:  The WAN Setup - Summary screen shows a preview of the WAN service 
you have configured. Check these settings and click Apply/Save if they 
are correct, or click Back to modify them. 
After clicking Apply/Save, the new service should appear on the main screen.   

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E2.3 Bridging 
NOTE:  This connection type is not available on the Ethernet WAN interface. 
STEP 1:  *Select the Bridging radio button and click Next.  
* 
For tagged service, enter valid 802.1P Priority and 802.1Q VLAN ID. 
For untagged service, set -1 to both 802.1P Priority and 802.1Q VLAN ID.
STEP 2:  The WAN Setup - Summary screen shows a preview of the WAN service 
you have configured. Check these settings and click Apply/Save if they 
are correct, or click Back to return to the previous screen.     
After clicking Apply/Save, the new service should appear on the main screen.   
NOTE:  If this bridge connection is your only WAN service, the WR-6891u will be 
inaccessible for remote management or technical support from the WAN. 

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Appendix F - WPS OPERATION 
This Section shows the basic AP WPS Operation procedure. 
F1 Add Enrollee with Pin Method 
1) Go to Advanced Setup  Wireless  Security. 
2) Select Enabled from the Enable WPS dropdown menu. 
3) Click the Apply/Save button at the bottom of the screen. 
4) When the screen refreshes select the Radio button “Enter STA Pin” 
5) Input Pin from Enrollee Station (15624697 in this example)     

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6) Click “Add Enrollee” 
7) Operate Station to start WPS Adding Enrollee. 
F2 Add Enrollee with PBC Method 
1) Press the WPS button on the front of the device to activate WPS PBC operation. 
2) Operate Station (your dongle for example) to start WPS Adding Enrollee. 

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F3 – Configure WPS External Registrar 
Follow these steps to add an external registrar using the web user interface (WUI) 
on a personal computer running the Windows 7 operating system: 
Step 1:  Enable UPnP on the Advanced Setup  LAN screen in the WUI. 
NOTE: A PVC must exist to see this option. 
Step 2:  Open the Network folder and look for the BroadcomAP icon. 

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Step 3:  On the Wireless  Security screen, enable WSC by selecting Enabled 
from the drop down list box and set the WPS AP Mode to Unconfigured. 
Step 4:  Click the Apply/Save button at the bottom of the screen.    The screen 
will go blank while the router applies the new Wireless settings.     

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Step 5:  Now return to the Network folder and click the BroadcomAP icon.    A 
dialog box will appear asking for the Device PIN number.    Enter the 
Device PIN as shown on the Wireless  Security screen.    Click Next. 
Step 6:  Windows 7 will attempt to configure the wireless security settings. 
Step 7:  If successful, the security settings will match those in Windows 7. 

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Appendix G - Printer Server 
These steps explain the procedure for enabling the Printer Server.   
NOTE:  This function only applies to models with an USB host port. 
STEP 1:  Enable Print Server from Web User Interface. Select Enable on-board 
print server checkbox  and enter Printer name and Make and model 
NOTE: The Printer name can be any text string up to 40 characters.     
 The Make and model can be any text string up to 128 characters. 

155
STEP 2:  Go to the Printers and Faxes application in the Control Panel and 
select the Add a printer function (as located on the side menu below). 
STEP 3: Click Next to continue when you see the dialog box below. 

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STEP 4: Select Network Printer and click Next. 
STEP 5:  Select Connect to a printer on the Internet and enter your printer link. 
  (e.g. http://192.168.1.1:631/printers/hp3845) and click Next.   
NOTE:    The printer name must be the same name entered in the ADSL modem 
WEB UI “printer server setting” as in step 1. 

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STEP 6:  Click Have Disk and insert the printer driver CD. 
STEP 7:  Select driver file directory on CD-ROM and click OK. 

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STEP 8:  Once the printer name appears, click OK. 
STEP 9:  Choose Yes or No for default printer setting and click Next. 

159
STEP 10: Click Finish. 

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STEP 11: Check the status of printer from Windows Control Panel, printer window.     
Status should show as Ready.  
