Eliminating a Dual Master Situation Manually
To eliminate the dual master situation, you need to know all the nodes
that are supposed to be in the stack. You might lose the management connectivity to the
master node because the other master node duplicates the stack‘s primary management IP
address and stack MAC address.

Note
The following procedure is necessary only if you cannot reconnect the severed link in a timely manner. If you can reconnect, the dual master condition resolves itself. The formerly broken portion of the stack reboots and the nodes come up as standby nodes.