spanning tree protocol

  • 0
  • 1
  • Question
  • Updated 2 years ago
  • Answered
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
Photo of Danial Jalil

Danial Jalil

  • 912 Points 500 badge 2x thumb

Posted 2 years ago

  • 0
  • 1
Photo of OscarK

OscarK, ESE

  • 7,912 Points 5k badge 2x thumb
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.
Photo of Erik Auerswald

Erik Auerswald, Embassador

  • 13,284 Points 10k badge 2x thumb
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.
Photo of Danial Jalil

Danial Jalil

  • 912 Points 500 badge 2x thumb
Thank you for your help guys! @Oscar @Erik