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CHAPTER
6-1
Software Configuration Guide—Release 12.2(20)EW
78-16453-01 A1
6
Configuring Supervisor Engine Redundancy on the
Catalyst 4507R and 4510R Switches
This chapter describes how to configure supervisor engine redundancy on the Catalyst 4507R and
Catalyst 4510R switches.
This chapter consists of the following major sections:
• Overview of Supervisor Engine Redundancy, page 6-1
• Understanding Supervisor Engine Redundancy, page 6-2
• Supervisor Engine Redundancy Guidelines and Restrictions, page 6-3
• Configuring Supervisor Engine Redundancy, page 6-4
• Synchronizing the Supervisor Engine Configurations, page 6-5
• Performing a Software Upgrade, page 6-6
• Copying Files to the Standby Supervisor Engine, page 6-7
Note For complete syntax and usage information for the switch commands used in this chapter, look at the
Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products/hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Command Reference, it is located in the larger Cisco
IOS library. Refer to the Catalyst 4500 Series Switch Cisco IOS Command Reference and related
publications at this location:
http://www.cisco.com/en/US/products/ps6350/index.html
Overview of Supervisor Engine Redundancy
Catalyst 4500 series switches allow a standby supervisor engine to take over if the primary supervisor
engine fails, thereby allowing the switch to resume operation quickly in the event of a supervisor engine
failure. This capability is called supervisor engine redundancy. In software, this capability is enabled by
route processor redundancy (RPR) operating mode.