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Stacking Dell PowerConnect 7000 Series Switches

If PoE is enabled on a switch port shortly before a master failover and the hardware status change had

not yet been communicated to the backup unit, the switch will continue to provide PoE power even

though PoE is not enabled for the port in the configuration on the new master. The user can correct

this configuration mismatch by re-enabling PoE on the port.

Stack Member Failover

When a unit in the stack fails, the master unit removes the failed unit from the stack. No changes or

configuration settings are applied to the other stack members; however, dynamic protocols will try to

re-converge as the topology could change because of the failed unit. When there are no connected

ports on the failed unit, the stack will be intact without any changes.

Failover Scenarios

This section describes examples of what happens when a stack member or the master unit fails.

Scenario 1

In this example, the stack has four members that are connected through a daisy-chain.

When all four units are up and running, the show switch CLI command gives the following output:

console#show switch

Managemen

Switch Status

------ ---------- ------------- --------- --------

Stack Mbr

Mgmt Sw

Stack Mbr

At this point, if Unit 2 is powered off or rebooted due to an unexpected failure, show switch gives

the following output:

Standby

Preconfig Plugged-in

Status

Model ID

Standby

PCT7048

Switch 1

Switch 2

Standby

Switch 3

Master

Switch 4

Model ID

PCT7048

Switch

Code

Status

Version

------------ --------

4.0.0.6

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