Cisco 6500 - Manual (Page 33)

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Cisco IOS Software Configuration Guide, Release 12.2SX
OL-13013-06
Chapter 4 Configuring Virtual Switching Systems
Configuring a VSS
Configuring VSL Port Channel and Ports
The VSL is configured with a unique port channel on each chassis. During the conversion, the VSS
configures both port channels on the VSS active chassis. If the VSS standby chassis VSL port channel
number has been configured for another use, the VSS comes up in RPR mode. To avoid this situation,
check that both port channel numbers are available on both of the chassis.
Check the port channel number by using the show running-config interface port-channel command.
The command displays an error message if the port channel is available for VSL. For example, the
following command shows that port channel 20 is available on Switch 1:
Switch-1 # show running-config interface port-channel 20
% Invalid input detected at '^' marker.
To configure the VSL port channels, perform this task on Switch 1:
Perform the following task on Switch 2:
You must add the VSL physical ports to the port channel. In the following example, interfaces 10-Gigabit
Ethernet 3/1 and 3/2 on Switch 1 are connected to interfaces 10-Gigabit Ethernet 5/2 and 5/3 on
Switch 2.
Tip For line redundancy, we recommend configuring at least two ports per switch for the VSL. For module
redundancy, the two ports can be on different switching modules in each chassis.
To configure the VSL ports, perform this task on Switch 1:
Command Purpose
Step 1 Switch-1(config)# interface port-channel 10 Configures port channel 10 on Switch 1.
Step 2 Switch-1(config-if)# switch virtual link 1 Associates Switch 1 as owner of port channel 10.
Step 3 Switch-1(config-if)# no shutdown Activates the port channel.
Step 4 Switch-1(config-if)# exit Exits interface configuration.
Command Purpose
Step 1 Switch-2(config)# interface port-channel 20 Configures port channel 20 on Switch 2.
Step 2 Switch-2(config-if)# switch virtual link 2 Associates Switch 2 as owner of port channel 20.
Step 3 Switch-2(config-if)# no shutdown Activates the port channel.
Step 4 Switch-2(config-if)# exit Exits interface configuration mode.
Command Purpose
Step 1 Switch-1(config)# interface range
tengigabitethernet 3/1-2
Enters configuration mode for interface range
tengigabitethernet 3/1-2 on Switch 1.
Step 2 Switch-1(config-if)# channel-group 10 mode on Adds this interface to channel group 10.
Step 3 witch-1(config-if)# no shutdown Activates the port.