I'm configuring VSS with two Sup2T but the Sup2T of the standby not coming active, any idea?
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i think this need to be port-channel 2 in the secondary VSS
interface port-channel 1 change it 2 and remove the 1 form the standby one
make sure you unplug the VSL links made the changes then connect them again also update the config in the primary VSS switch and save the config before joining them over VSL
hope this help
You have configured the same portchannel number on both sides of the VSL link. The portchannel numbers need to be different for each side.
switch 1 portchannel 1
switch 2 portchannel 2
Have a look at this link for an example: