CHAPTER
11-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
11
Configuring Supervisor Engine Redundancy Using
RPR and SSO on Supervisor Engine 6-E and
Supervisor Engine 6L-E
Catalyst 4500 series switches allow a redundant supervisor engine to take over if the active supervisor
engine fails. In software, supervisor engine redundancy is enabled by running the redundant supervisor
engine in route processor redundancy (RPR) or stateful switchover (SSO) operating mode.
Note The minimum ROMMON requirement for running SSO is Cisco IOS Release 12.1(20r)EW1 or
Cisco IOS Release 12.2(20r)EW1.
This chapter describes how to configure supervisor engine redundancy on the Catalyst 4507R and
Catalyst 4510R switches.
Note For information on Cisco nonstop forwarding (NSF) with SSO, see Chapter 12, “Configuring Cisco NSF
with SSO Supervisor Engine Redundancy.”
This chapter contains these major sections:
• About Supervisor Engine Redundancy, page 11-2
• About Supervisor Engine Redundancy Synchronization, page 11-4
• Supervisor Engine Redundancy Guidelines and Restrictions, page 11-5
• Configuring Supervisor Engine Redundancy, page 11-7
• Performing a Manual Switchover, page 11-12
• Performing a Software Upgrade, page 11-13
• Manipulating Bootflash on the Redundant Supervisor Engine, page 11-14
Note For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
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