Chapter 4 Configuring Ehsa Supervisor Engine Redundancy; Supervisor Engine Redundant Operation - Cisco 7609 Configuration Manual

Configuring EHSA Supervisor Engine
Redundancy
With 12.1 E releases earlier than Release 12.1(13)E, the Cisco 7600 series router supports dual
supervisor engines with EHSA.
Note EHSA is not supported in Release 12.1(13)E and later releases (see
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
Cisco 7600 Series Router 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

Cisco 7600 series routers 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 router recovers.
78-14064-04
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
for information about RPR or RPR+ redundancy in Release
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
C H A P T E R
Chapter 5, "Configuring RPR and
4
4-1