Cisco 3845 - Security Bundle Router Software Manual page 335

Chapter 16 Configuring Resilient Ethernet Protocol
Command
Step 6
rep block port {id port-id | neighbor_offset |
preferred} vlan {vlan-list | all}
Step 7
rep preempt delay seconds
Step 8
rep lsl-age-timer value
Step 9 end
Step 10 show interface [interface-id] rep [detail]
Step 11 copy running-config startup config
Enter the no form of each command to return to the default configuration. Enter the show rep topology
privileged EXEC command to see which port in the segment is the primary edge port.
OL-23400-01
Purpose
(Optional) Configure VLAN load balancing on the primary edge
port, identify the REP alternate port, and configure the VLANs to be
blocked on the alternate port.
Enter the id port-id to identify the alternate port by port ID. The
•
port ID is automatically generated for each port in the segment.
You can view interface port IDs by entering the show interface
interface-id rep [detail] privileged EXEC command.
Enter a neighbor_offset number to identify the alternate port as
•
a downstream neighbor from an edge port. The range is from
–256 to 256, with negative numbers identifying the downstream
neighbor from the secondary edge port. A value of 0 is invalid.
Enter -1 to identify the secondary edge port as the alternate port.
See Figure 16-4 on page 16-5
numbering.
Because you enter this command at the primary edge port
Note
(offset number 1), you would never enter an offset value of 1
to identify an alternate port.
Enter preferred to select the regular segment port previously
•
identified as the preferred alternate port for VLAN load
balancing.
Enter vlan vlan-list to block one VLAN or a range of VLANs.
•
• Enter vlan all to block all VLANs.
Note Enter this command only on the REP primary edge port.
(Optional) You must enter this command and configure a preempt
time delay if you want VLAN load balancing to automatically trigger
after a link failure and recovery. The time delay range is 15 to 300
seconds. The default is manual preemption with no time delay.
Note Enter this command only on the REP primary edge port.
(Optional) Configure a time (in milliseconds) for which the REP
interface remains up without receiving a hello from a neighbor. The
range is from 920 to 10000 ms in 40-ms increments; the default is
5000 ms (5 seconds).
Note If the neighbor device is not running Cisco IOS Release
12.2()SE or later, it will only accept values from 3000 to
10000 ms in 500 ms increments.
EtherChannel port channel interfaces do not support LSL
age-timer values less than 1000 ms.
Return to privileged EXEC mode.
Verify the REP interface configuration.
(Optional) Save your entries in the switch startup configuration file.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring REP
for an example of neighbor offset
16-11