ExtremeSwitching (EXOS)

  • 1.  Log where spanning tree TCN's are coming from.

    Posted 11-12-2015 14:57
    Currently in the process of correcting a spanning tree mis-configuration, predominantly caused by ports not correctly configured as edge ports.

    Currently seeing a lot of spanning tree TCN's on the core, but need to workout whereabouts, or what port are they coming in from.

    Currently have the following added to the defaultfilter

    configure log filter DefaultFilter add events STP.SendClntTopoChgMsg[/code]

    Which is producing the following log entries multiple times:

    11/12/2015 15:48:00.06


  • 2.  RE: Log where spanning tree TCN's are coming from.

    Posted 11-13-2015 10:22
    and the answer is:

    configure log filter DefaultFilter add events STP.State.Topology

    [/code]

    So with both commands deployed:

    configure log filter DefaultFilter add events STP.SendClntTopoChgMsg
    configure log filter DefaultFilter add events STP.State.Topology[/code]

    You now get a log something like the below, which shows the TCN and what port (46) that it was detected on.

    11/13/2015 09:19:37.19


  • 3.  RE: Log where spanning tree TCN's are coming from.

    Posted 11-13-2015 10:22
    Looks like you beat the community to a response :)
    Thanks for coming back with the answer.