39-4
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 39 Configuring HSRP and Enhanced Object Tracking
Configuring HSRP
Figure 39-2 MHSRP Load Sharing
HSRP and Switch Stacks
HSRP hello messages are generated by the stack master. If an HSRP-active stack master fails, a flap in
the HSRP active state might occur. This is because HSRP hello messages are not generated while a new
stack master is elected and initialized, and the standby router might become active after the stack master
fails.
Configuring HSRP
These sections contain this configuration information:
• Default HSRP Configuration, page 39-5
• HSRP Configuration Guidelines, page 39-5
• Enabling HSRP, page 39-5
• Configuring HSRP Priority, page 39-6
• Configuring MHSRP, page 39-9
• Configuring HSRP Authentication and Timers, page 39-9
• Enabling HSRP Support for ICMP Redirect Messages, page 39-11
• Configuring HSRP Groups and Clustering, page 39-11
121235
Active router for group 1
Standby router for group 2
Client 1
Router A Router B
10.0.0.1 10.0.0.2
Active router for group 2
Standby router for group 1
Client 2 Client 3 Client 4
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