As shown below TCA BPDU is a multicast message, if it's true, why the other switches in the scenario do not receive this message?? Scenario:
WireShark packet capture on ESW1 (root switch) shows TCA BPDU has been sent as multicast message:
WireShark packet capture on another switch (ESW2) at the same time :
asked 03 Oct '15, 08:39  MehranBazgir |
One Answer:
Because the TCN is sent to the Root Bridge and the Root Bridge acknowledges the TCN with an TCA only on that link. The ESW4 receives the TCA but do not need to forward it, because he is the receiver. More Details can be found here: http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/12013-17.html answered 03 Oct '15, 11:21  Christian_R edited 03 Oct '15, 11:39 |
