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RPVST on VLAN and a lot of Event ID 5007 topology changes

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  • 1.  RPVST on VLAN and a lot of Event ID 5007 topology changes

    Posted Aug 05, 2024 05:32 PM

    I have an 8320 that is running RPVST. 

    in the course of 24hrs is am seeing about 150-200 Event ID 5007 Topology change generated messages in the logs. I am looking at show spanning-tree and diag-dump, but I'm not seeing anything that is standing out. I know a handful are ok, but this seems like more than normal. Is there anything in particular I should check



  • 2.  RE: RPVST on VLAN and a lot of Event ID 5007 topology changes

    Posted Aug 05, 2024 05:38 PM

    I had something similar happen to me and turned out to be a loop issue with a piece of ISP equipment. Try enabling loop-protect on your uplink ports with the loop-protect action do-not-disable command and see if you start seeing loop messages in your logs.

    switch# config

    switch(config)# interface 1/1/1 <- uplink port

    switch(config-if)# loop-protect

    switch(config-if)# loop-protect action do-not-disable


    Original Message


  • 3.  RE: RPVST on VLAN and a lot of Event ID 5007 topology changes

    Posted Aug 06, 2024 02:08 AM

    Hi

     

    Can you identify the source of the topology changes? Either it's a (or even multiple) local interface or it's generated by another bridge that participates in the STP topology.

    If coming from another bridge, you should investigate on that bridge. A possible source could be that you have edge ports (i.e. where a client computer that comes and goes is connected to) where you forgot to configure "port-type admin-edge". If a switch doesn't consider a port as edge port, TCNs are generated if the interface comes up or goes down.

     

    Could you please post the full log message (event 5007) you see?

     

    Regards,

    Thomas

     




    Original Message


  • 4.  RE: RPVST on VLAN and a lot of Event ID 5007 topology changes

    Posted Aug 10, 2024 04:45 PM
      |   view attached

    Thank you for the help, I did try the loop-protect, but I see no log messages. 


    I did forget the port-type, I added that.

    I was able to trace out the connection and it goes from an Aruba 8320 JL581A to a device for a Door Alarm system. I do have a port that goes from an Aruba 6300M JL661A to and PC that does the same. I see no loops, this is message I get in my logs:


    Original Message


  • 5.  RE: RPVST on VLAN and a lot of Event ID 5007 topology changes

    Posted Aug 14, 2024 04:47 PM

    Since adding the admin-edge command I no longer see any spanning-tree changes. The port still goes up/ down. I am thinking it is an issue with the end device at this point. I toned out the cabling and that is good…


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  • 6.  RE: RPVST on VLAN and a lot of Event ID 5007 topology changes

    EMPLOYEE
    Posted Aug 16, 2024 07:54 PM

     During spanning tree establishment, ports with admin-edge enabled transition immediately to the forwarding state.



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    Original Message