VSF split

A VSF split can occur due to a VSF link failure where all ports in the VSF link go down or any member is power-cycled or crashes in the chain topology. This failure results in independent VSF fabric fragment each having its own Commander role. It is recommended to configure a Multiple Active Detection (MAD) mechanism to avoid duplicate IP addresses, routing issues and traffic forwarding problems when a VSF split occurs.

VSF split
In the preceding figure, after the split, Member 1 will be elected as the new Standby in the previous Commander fragment. Previous Standby will failover and become Commander. Member 2 will be elected as a new standby to that fragment. Once the fragment become inactive, all front plane ports except VSF links will be brought down. A limited set of CLI commands will be available on the inactive fragment.