Restoring operation after power cord disconnection
If a power cord becomes disconnected from one
of the switches in the stack, the stack operation is affected; stacking
status of the switch that lost power is “Missing” but
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 its network ports and stacking ports are nonoperational 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 topology has 3 or more members and the switch was either the Commander or the Standby, it returns in a different role. In a 2-member stack, a Standby that reboots rejoins as Standby.