Switching

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Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations.

  • 1.  Port UP but disabled by STP

    Posted 12-02-2014 06:37

     Hi,

     

    I predominately work with kit from "the other vendor" so the answer may be very simple.

     

    We see no mac address on a EX4200 port and get no connectivity although the port is UP.

     

    Other ports in the same vlan are working albeit on a different member of the virtual chassis

     

     me@ex4200> show ethernet-switching interfaces ge4/0/11
    Interface State VLAN members Tag Tagging Blocking
    ge-4/0/11.0 up v580 580 untagged blocked by STP

     

    Any help appreciated, thanks.



  • 2.  RE: Port UP but disabled by STP

    Posted 12-02-2014 07:08

    can you do a show spanning-tree interface? And what is plugged into this port that keeps going down?



  • 3.  RE: Port UP but disabled by STP

    Posted 12-02-2014 07:42

    show spanning-tree interface returns nothing for the port, it does for other ports. Various devices have been tried now, server and laptop.

     

    Thanks for the reply



  • 4.  RE: Port UP but disabled by STP

    Posted 12-03-2014 00:57

    Hi,

     

     

    create firewall filter to block mac address global BPDU. Apply to input that interface.



  • 5.  RE: Port UP but disabled by STP

    Posted 12-18-2014 17:36

    Without the topology, it would be blocked becuase STP determines that if the port is opened, it would create a loop. Does the device have dual NICS connected the switch?