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Figure 13. Cisco Virtual Switching System Conversion
Step 1. Configure virtual switch ID and domain.
On the two switches, configure the same virtual switch
domain number (in this case it is 100), but unique switch
IDs using the following configuration mode commands:
VSS-sw1#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
VSS-sw1(config)#switch virtual domain 100
Domain ID 100 config will take effect only
after the exec command „switch convert
mode virtual‟ is issued
VSS-sw1(config-vs-domain)#switch 1
VSS-sw1(config-vs-domain)#
VSS-sw2#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
VSS-sw2(config)#switch virtual domain 100
Domain ID 100 config will take effect only
Aft er the exec command „switch convert
mode virtual‟ is issued
VSS-sw2(config-vs-domain)#switch 2
VSS-sw2(config-vs-domain)#
Note that as a result of this command, the domain ID is retained in the configuration, but the switch ID is not; this
value is stored as a variable in ROMmon. It can be confirmed by issuing the following command on each switch:
VSS-sw1#switch read switch_num
Read switch_num from rommon is 1
VSS-sw2#switch read switch_num
Read switch_num from rommon is 2
Step 2. Configure the VSL port channel and member ports.
Choose unique port-channel IDs for each chassis to form the VSL and configure them with the corresponding switch
ID using the following commands:
VSS-sw1#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
VSS-sw1(config)#interface port-channel 1
VSS-sw1(config-if)#switch virtual link 1
VSS-sw1(config-if)#no shut
VSS-sw1(config-if)#
VSS-sw2#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
VSS-sw2(config)#interface port-channel 2
VSS-sw2(config-if)#switch virtual link 2
VSS-sw2(config-if)#no shut
VSS-sw2(config-if)#
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