Chapter 4 Configuring Ehsa Supervisor Engine Redundancy; Supervisor Engine Redundant Operation - Cisco 6500 Series Software Configuration Manual

Configuring EHSA Supervisor Engine
Redundancy
With 12.1 E releases earlier than Release 12.1(13)E, the Catalyst 6500 series switch supports dual
supervisor engines with EHSA.
EHSA is not supported in Release 12.1(13)E and later releases (see
Note
RPR+ Supervisor Engine Redundancy,"
12.1(13)E and later releases.
This chapter consists of these sections:
•
•
•
•
•
For complete syntax and usage information for the commands used in this chapter, refer to the
Note
Catalyst 6500 Series Switch Cisco IOS Command Reference publication and the Release 12.1
publications at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/index.htm

Supervisor Engine Redundant Operation

Catalyst 6500 series switches support fault resistance by allowing a redundant supervisor engine to take
over if the primary supervisor engine fails. The redundant supervisor engine runs in EHSA standby
mode.
Note The EHSA feature is not supervisor engine mirroring or load balancing. Network services are disrupted
until the redundant supervisor engine takes over and the switch recovers.
78-14099-04
Supervisor Engine Redundant Operation, page 4-1
Supervisor Engine Redundancy Requirements, page 4-2
Synchronizing the Supervisor Engine Configurations, page 4-3
Displaying the Supervisor Engine Redundancy, page 4-4
Copying Files to the Redundant Supervisor Engine, page 4-4
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
C H A P T E R
for information about RPR or RPR+ redundancy in Release
4
Chapter 5, "Configuring RPR and
4-1