Cisco Catalyst 4500 Series Configuration Manual page 530

mode
mode
To set the redundancy mode, use the mode command.
Syntax Description
rpr
sso
Command Default If you are upgrading the current supervisor engine from Cisco IOS Release 12.2(18)EW or an earlier
release to 12.2(20)EWA, and the RPR mode has been saved to the startup configuration, both supervisor
engines will continue to operate in RPR mode after the software upgrade. To use SSO mode, you must
manually change the redundancy mode to SSO.
Command Modes
Redundancy configuration mode
Command History Release
12.2(20)EWA
Usage Guidelines
The mode command can be entered only from within redundancy configuration mode.
Follow these guidelines when configuring your system to RPR or SSO mode:
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•
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The redundant supervisor engine reloads on any mode change and begins to work in the current mode.
Examples
The following example shows how to set the redundancy mode to SSO:
Switch(config)# redundancy
Switch(config-red)# mode sso
Switch(config-red)#
Related Commands
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release XE 3.9.xE and 15.2(5)Ex
2-490
mode {rpr | sso}
Specifies RPR mode.
Specifies SSO mode.
Modification
This command was introduced on the Catalyst 4500 series switch.
You must use identical Cisco IOS images and supervisor engines to support RPR and SSO mode.
Redundancy may not work due to differences between the Cisco IOS release and supervisor engine
capabilities.
Any modules that are not online at the time of a switchover are reset and reloaded on a switchover.
If you perform an OIR of the module within 60 seconds before a stateful switchover, the module
resets during the stateful switchover and the port states are restarted.
The FIB tables are cleared on a switchover. Routed traffic is interrupted until route tables
reconverge.
Chapter 2