Network Architecture & Design

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  • 1.  spanning tree protocol

    Posted 12-01-2016 09:33
    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



  • 2.  RE: spanning tree protocol

    Posted 12-01-2016 09:56
    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.


  • 3.  RE: spanning tree protocol

    Posted 12-01-2016 15:31
    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.


  • 4.  RE: spanning tree protocol

    Posted 12-05-2016 08:26
    Thank you for your help guys!@Oscar@Erik