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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 23 Configuring Redundancy
MSFC Redundancy
Example 3: Double Chassis with Dual Supervisor Engines and MSFCs
Figure 23-7 shows two Catalyst 6500 series switches (S1 and S2), each with a supervisor engine and
MSFC in slot 1 (Sup #1/MSFC #1) and slot 2 (Sup #2/MSFC #2). Because there is no Layer-2 loop,
HSRP is used for convergence and load sharing. In both switches, Sup #1 is the active supervisor engine,
and Sup #2 is the standby supervisor engine.
Figure 23-7 Dual MSFC Operational Model for Redundancy and Load Sharing
This example shows how to configure HSRP on the MSFC in Switch S1:
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 110
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 108
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 109
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 107
VLAN 10 VLAN 21
Switch S2Switch S1
38599
Slot 1
Sup#1/MSFC#1
HSRP Active VLAN 10: priority 110
HSRP Standby VLAN 21: priority 108
Slot 2
Sup#2/MSFC#2
HSRP Standby VLAN 10: priority 109
HSRP Standby VLAN 21: priority 107
Slot 1
Sup#1/MSFC#1
HSRP Standby VLAN 10: priority 108
HSRP Active VLAN 21: priority 110
Slot 2
Sup#2/MSFC#2
HSRP Standby VLAN 10: priority 107
HSRP Standby VLAN 21: priority 109
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