ExtremeSwitching (EXOS)

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Edge port topology change

  • 1.  Edge port topology change

    Posted 12-18-2017 11:41
    Hi, sometimes i get confused probably because i am missing something very obvious but im unable to see it.

    For some reason a port configured as an edge port is initiating topologies changes, the port configuration is as follows:
    configure stpd s0 ports link-type edge 3:32 configure stpd s0 ports edge-safeguard enable 3:32 configure stpd s0 ports bpdu-restrict enable 3:32 [/code]on the switch logs i see the following:


  • 2.  RE: Edge port topology change

    Posted 12-18-2017 12:13
    Can you provide us with a little more information such as the output of the following command show stpd s0 ports 3:32 detail?



  • 3.  RE: Edge port topology change

    Posted 12-18-2017 12:50
    Hello GONÇALO,

    Please check the issue on the EXOS 22.2.1.5-patch1-4, as it is not affected by next CRs

    “CR#xos0069839 - Operational Edge status is inconsistent if edge-safeguard is enabled before configuring link as edge”.
    “CR xos0069755 - when edge port goes down topology change is incorrectly triggered”

    Or you may wait for December's '18 patch 22.3.1.4

    Best Regards,
    Nikolay


  • 4.  RE: Edge port topology change

    Posted 12-18-2017 14:11
    Hi Brian,

    Here is the output:
    sh stpd s0 port 3:32 detail Stpd: s0 Port: 3:32 PortId: 8120 Stp: ENABLED Path Cost: 20000 Port Mode : 802.1D Port Role : Designated Port State : FORWARDING Topology Change Ack: FALSE Port Priority : 128 Designated Root : 20:00:74:a0:2f:0c:dd:80 Designated Cost: 20000, IntCost: 0 Designated Bridge : 80:00:02:04:96:9e:5e:41 Designated Port Id: 8120 Partner STP version : Dot1w Restricted Role : Disabled Active Role : Disabled Edge Port Safe Guard : Enabled Bpdu Restrict : Enabled maxAge: 20 msgAge: 1 fwdDelay: 15 helloTime: 2 maxHops: 20 Restricted TCN : Off Loop Protect : Off Loop Protect Partner : Incapable Operational Edge : FALSE Auto Edge : On Participating Vlans: Aulas [/code]
    thanks


  • 5.  RE: Edge port topology change

    Posted 12-18-2017 12:50
    Hi Nikolay

    i have update recently all my switches and im running 22.3.1.4-patch1-4

    Regards


  • 6.  RE: Edge port topology change

    Posted 12-18-2017 12:50
    Hi Nikolay

    Can you explain me what is "next CRs"?

    Regards


  • 7.  RE: Edge port topology change

    Posted 12-18-2017 12:50
    Hello,

    That are CRs about known STP issues, and 22.3.1.4p1-4 is affected and does not contain fixes. Fixes are expected in a next patch 22.3.

    Best Regards,
    Nikolay


  • 8.  RE: Edge port topology change

    Posted 12-18-2017 12:50
    Thanks Nikolay


  • 9.  RE: Edge port topology change

    Posted 12-18-2017 14:11
    Hi, All as i said before on EXOS 22.3.1.4 for some unknown reasons ports configured with link-type edge are initiating topology changes, this happens because the operational edge goes from True to False and the port starts behaving has if there was no link-type edge configuration. Thanks to Nicolay i was informed that this would be corrected in the next patch.

    Since there is no next patch yet for EXOS 22.3.1.4 i have taken the initiative to try the new EXOS release 22.4.1.4. After reading the resolved issues i was convinced that this issue was solved since CR xos0069755 is among the list of solved issues.

    I would like to underline that i am not sure if CR xos0069755 relates to the issue i am experiencing even though the end result is the same, the port incorrectly trigger a topology change.

    All the ports connected to end devices on my network have the following configuration
    configure stpd s0 ports link-type edge 3:32 configure stpd s0 ports edge-safeguard enable 3:32 configure stpd s0 ports bpdu-restrict enable 3:32 [/code]this can be verified with the command "sh stpd s0 port 3:32 detail", the important lines from the output are as follows.
    Edge Port Safe Guard : Enabled
    Bpdu Restrict : Enabled
    Operational Edge : TRUE
    Auto Edge : On[/code]After changing a port vlan the Operational Edge goes to FALSE and when the port links up a topology change is triggerd even though the port is still configured with the link-type edge. I have tried to disable the Auto Edge, but no luck.
    Edge Port Safe Guard : Enabled
    Bpdu Restrict : Enabled
    Operational Edge : FALSE Auto Edge : On [/code]The only solution i have found for the moment, is uppon changing a port vlan, double check if Operational Edge is FALSE and if so the port must be reconfigured with the link-type edge command in the following order to bring the Operational EDGE to TRUE.
    configure stpd s0 ports link-type edge 3:32 configure stpd s0 ports edge-safeguard enable 3:32 configure stpd s0 ports bpdu-restrict enable 3:32 [/code]Regards
    Gonçalo Reis