Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
mode
mode
To set the redundancy mode, use the mode command.
mode {rpr | sso}
Syntax Description
Defaults 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
Usage Guidelines RPR and SSO mode are not supported on Catalyst 4500 series switches that are configured with
Supervisor Engine 2.
The mode command can be entered only from within redundancy configuration mode.
Follow these guidelines when configuring your system to RPR or SSO mode:
• 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.
The redundant supervisor engine reloads on any mode change and begins to work in the current mode.
Examples This example shows how to set the redundancy mode to SSO:
Switch(config)# redundancy
Switch(config-red)# mode sso
Switch(config-red)#
rpr Specifies RPR mode.
sso Specifies SSO mode.
Release Modification
12.2(20)EWA Support for this command was introduced on the Catalyst 4500 series switch.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E