Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
rep preempt segment
rep preempt s egment
Use the rep preempt segment privileged EXEC command to manually start Resilient Ethernet Protocol
(REP) VLAN load balancing on a segment .
rep pree mpt se gmen t segment_id
Syntax Description
Defaults Manual preemptio n is the default behavior.
Command Modes Privileged EXEC
Usage Guidelines When you ent er t he rep preempt segment segment-id command, a confirmation message appears before
the command is executed because pree mption can cause network di sruption.
Enter this command on the switch on the segment that has the primary edge port.
If you do not configure VLAN load balanci ng, entering this comma nd results in the default
behavior—the primary edge port bl ocks 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 R EP preemption on segment 100 w ith 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
segment-id ID of the REP segment. The ran ge is from 1 to 1024.
Command Description
rep block port Configures VLAN load balancing.
show interfaces rep [detail]
(IOS command)
Displays REP configuration and status for all interfaces or the specified
interface.