topic RE: spanning tree protocol in Network Architecture & Design

spanning tree protocol

Danial_Jalil — Thu, 01 Dec 2016 17:33:00 GMT

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

RE: spanning tree protocol

OscarK — Thu, 01 Dec 2016 17:56:00 GMT

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.

RE: spanning tree protocol

Erik_Auerswald — Thu, 01 Dec 2016 23:31:00 GMT

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.

RE: spanning tree protocol

Danial_Jalil — Mon, 05 Dec 2016 16:26:00 GMT

Thank you for your help guys!@Oscar@Erik