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spanning tree protocol

  • 1 December 2016
  • 3 replies

Userlevel 1
I have disabled spanning tree everywhere on vlans, interfaces yet when i generate PFC pause frames some spanning tree packets are also captured. Can anybody help me how to turn them off.

following is the capture of wireshark:

0.045006 ExtremeN_97:e6:79 Spanning-tree-(for-bridges)_01 MAC Control MAC CTRL 64 MAC CLASS BASED FLOW CONTROL PAUSE Spanning-tree-(for-bridges)_01 ExtremeN_97:e6:79

3 replies

Userlevel 6
PFC pause frames are also send to the same dmac as STP, 01:80:c2:00:00:01 so I think wireshark accidently sees these as STP.
Userlevel 7
As Oscar, I'd say that is a result of Wireshark using names for MAC addresses. Thus this seems to be related to STP, while it just uses the same MAC address. The line shown above clearly shows a PFC frame, not an STP BPDU. To confirm this, you can drill into the frame data inside Wireshark.
Userlevel 1
Thank you for your help guys!@Oscar@Erik