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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 12 Configuring Resilient Ethernet Protocol
Configuring Resilient Ethernet Protocol (REP)
Step 8
rep platform vlb segment
segment-id
vlan
{
vlan-list
|all}
Example:
Router(config)# rep platform vlb segment
1 vlan 100-200
(Optional) Configures the VLAN list which forms the VLB group.
This command should be issued on all Cisco ASR 901 routers
participating in VLB for a particular segment and should have a
matching VLAN list. This VLAN list should also match with the
rep block command issued on primary edge port.
• Enter vlan vlan-list to block a single VLAN or a range of
VLANs,
• Enter vlan all to block all VLANs. This is the default
configuration.
Step 9
rep block port {id
port-id
|
neighbor-offset
| preferred} vlan
{
vlan-list
| all}
Example:
Router(config-if)# rep block port
0009001818D68700 vlan all
(Optional) Configures VLAN load balancing on the primary edge
port, identifies the REP alternate port in one of three ways, and
configures 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 indicating 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.
Note Because you enter this command at the primary edge port
(offset number 1), you would never enter an offset value of
1 to identify an alternate port.
• Enter the preferred keyword 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.
Step 10
rep preempt delay
seconds
Example:
Router(config-if)# rep preempt delay 60
(Optional) Configures a preempt time delay. Use this command 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 Use this command only on the REP primary edge port.
Step 11
rep lsl-age-timer
value
Example:
Router(config-if) rep lsl-age-timer 5000
(Optional) Configure a time (in milliseconds) for which the REP
interface remains up without receiving a hello from a neighbor. The
range is from 120 to 10000 ms in 40-ms increments; the default is
5000 ms (5 seconds).
Command Purpose