23-34
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 23 Configuring Redundancy
MSFC Redundancy
Router(config-if)# standby 21 preempt
Router(config-if)# standby 21 timers 5 15
Router(config-if)# standby 21 authentication Secret
Router(config-if)# ^Z
Router# ^C^C^C
This example shows how to configure HSRP on the MSFC in Switch S2:
Console> (enable) switch console 15
Trying Router-15...
Connected to Router-15.
Type ^C^C^C to switch back...
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface vlan10
Router(config-if)# standby 10 ip 172.20.100.10
Router(config-if)# standby 10 priority 108
Router(config-if)# standby 10 preempt
Router(config-if)# standby 10 timers 5 15
Router(config-if)# standby 10 authentication Secret
Router(config-if)# interface vlan21
Router(config-if)# standby 21 ip 192.20.100.21
Router(config-if)# standby 21 priority 110
Router(config-if)# standby 21 preempt
Router(config-if)# standby 21 timers 5 15
Router(config-if)# standby 21 authentication Secret
Router(config-if)# ^Z
Router# ^C^C^C
Console> (enable) switch console 16
Trying Router-16...
Connected to Router-16.
Type ^C^C^C to switch back...
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface vlan10
Router(config-if)# standby 10 ip 172.20.100.10
Router(config-if)# standby 10 priority 107
Router(config-if)# standby 10 preempt
Router(config-if)# standby 10 timers 5 15
Router(config-if)# standby 10 authentication Secret
Router(config-if)# interface vlan21
Router(config-if)# standby 21 ip 192.20.100.21
Router(config-if)# standby 21 priority 109
Router(config-if)# standby 21 preempt
Router(config-if)# standby 21 timers 5 15
Router(config-if)# standby 21 authentication Secret
Router(config-if)# ^Z
Router# ^C^C^C
MSFC Configuration Synchronization Overview
MSFC high availability allows for automatic synchronization of the startup configuration and running
configuration between the designated MSFC (the MSFC to come online first or the MSFC that has been
online the longest) and the nondesignated MSFC. High-availability redundancy is disabled by default.
Caution Configuration synchronization is only supported for the IP and IPX configurations. Before enabling
synchronization, you must ensure that both MSFCs have identical configurations for all protocols. If you
are using AppleTalk, DECnet, VINES, or any other routing, you must manually ensure that identical
configurations are on both MSFCs for all protocols.
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