VSF uses two member roles: Commander and Standby.
This is the Commander for the VSF. Control and
management plane protocols run on the Commander, which is responsible
for managing the forwarding databases, synchronizing them with the
Standby and controlling all line cards including that of the Standby.
Standby is a stateful backup device for the Commander
and is ready to take control of the VSF virtual chassis if the Commander
device crashes. This enables the VSF virtual chassis to continue its
operations seamlessly in the event of a failure.