STP TCN from StackPort1 on 3750

[dominic.caron]

Hi, how can a switch in a stack cause a topology change ?

Number of topology changes 4 last change occurred 5d19h ago

from StackPort1

[maskmukesh]

Hi Dominic,

As you said that switches are in stack, they themselves elect a stack master and which is used for further topology election.

When u change any switch in stack or a switch boots the election process starts to elect the stack master. which causes the toplogy change.

please rate if it helped you.

regards

Mukesh

[dominic.caron]

No new switch were added to the stack and every access port is in portfast/bpduguard.