Restoring operation after disconnecting a power cord
If a power cord becomes disconnected from one
of the switches in the stack, the stack operation is affected. The
stacking status of the switch that lost power is “Missing.”
Its record is retained in the stack configuration. The effect of the
power loss depends on the role of the switch in the stack.
If the Commander loses power, the Standby switch takes over as the Commander and one of the member switches in the stack is elected as the new Standby.
If the Standby loses power, one of the member switches in the stack is elected as the new Standby.
For any switch that loses power, all the network ports and stacking ports are non-operational until power is restored to the switch and it rejoins the stack. This affects the stacking topology.
Reconnecting the power cord restores the operation of the switch, however, if the switch was either the Commander or the Standby, then it returns in a different role if the topology has 3 or more members. In a 2-member stack, a Standby that reboots will rejoin as Standby.