Performing A Manual Switchover - Cisco Catalyst 4500 Series Configuration Manual

Performing a Manual Switchover

Performing a Manual Switchover
This section describes how to perform a manual switchover (from the active supervisor engine to the
standby supervisor engine) for test purposes. We recommend that you perform a manual switchover prior
to deploying SSO in your production environment.
This discussion assumes that SSO has been configured as the redundant mode.
Note
To perform a manual switchover, perform this task on the active supervisor engine:
Command
Step 1
Switch# show redundancy
Step 2
Switch# redundancy force-switchover
Be aware of these usage guidelines:
•
•
After a normal switchover, you might want to make the supervisor engine in a lower slot number of the
chassis the active supervisor engine. Use the show module command to see which slot contains the
active supervisor engine, and force another switchover if necessary.
Performing a Software Upgrade
This is useful only if IOS -XE software is running in LAN Base mode. For Enterprise Services or IP Base
mode, use ISSU to upgrade software for both RPR and SSO redundant mode.
The software upgrade procedure supported by supervisor engine redundancy allows you to reload the
Cisco IOS software image on the redundant supervisor engine, and once complete, reload the active
supervisor engine once.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
10-12
Chapter 10 Configuring Supervisor Engine Redundancy Using RPR and SSO on Supervisor Engine 7-E and Supervisor
force a switchover, the redundant supervisor engine must be in a standby hot (SSO) or standby cold
(RPR) state. You can verify the state with the show redundancy command. If the state is not standby
hot or standby cold, the redundancy force-switchover command will not execute.
Use the redundancy force-switchover command, rather than the reload command, to initiate a
switchover. The redundancy force-switchover command will first check that the redundant
supervisor engine is in the correct state. If you issue the reload command and the status is not
standby hot or standby cold, the reload command will reset the current supervisor engine and the
peer supervisor may not be able to take over because it was not in a terminal state (standby hot or
cold).
Purpose
Verifies that the peer state is in the standby hot state.
See the example of the show redundancy states
command on page 6-10.
Launches switchover from the active supervisor engine
to the standby supervisor engine.
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