Rep Preempt Segment - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

rep preempt segment

Use the rep preempt segment privileged EXEC command to manually start Resilient Ethernet Protocol
(REP) VLAN load balancing on a segment.
Syntax Description segment-id
Defaults
Manual preemption is the default behavior.
Command Modes Privileged EXEC
Command History Release
12.2(44)SG
Usage Guidelines
When you enter the rep preempt segment segment-id command, a confirmation message appears before
the command is executed because preemption can cause network disruption.
Enter this command on the switch on the segment that has the primary edge port.
If you do not configure VLAN load balancing, entering this command results in the default
behavior—the primary edge port blocks all VLANs.
You configure VLAN load balancing by entering the rep block port {id port-id | neighbor_offset |
preferred} vlan {vlan-list | all} interface configuration command on the REP primary edge port before
you manually start preemption.
There is not a no version of this command.
Examples
This example shows how to manually trigger REP preemption on segment 100 with the confirmation
message:
Switch)# rep preempt segment 100
The command will cause a momentary traffic disruption.
Do you still want to continue? [confirm]
Related Commands Command
rep block port
show interfaces rep [detail] Displays REP configuration and status for all interfaces or the specified
OL-27596 -01
rep preempt segment segment_id
ID of the REP segment. The range is from 1 to 1024.
Modification
This command was introduced.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
Description
Configures VLAN load balancing.
interface.
rep preempt segment
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