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Blocking STP BPDU's over L2VPN and VPLS

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  • 1.  Blocking STP BPDU's over L2VPN and VPLS

    Posted 09-24-2009 15:04

    Hello,

    I am looking for a way to block spanning-tree BPDU's from being transmitted across  a VPLS or L2VPN instance. I have encountered an issue where Cisco switches configured with different native VLANs on their core facing interfaces will cause an err-disable state, due to the mismatched VLANs in the BPDU's. Is there an easy way to block BPDU's on a per interface or per routing-instance basis? I've tried configuring protocol *stp under the VPLS routing instance but it appears this combination is not valid. I am using MX series routers with 9.3R3.8 code. 

     

    Thanks,

    Nick 



  • 2.  RE: Blocking STP BPDU's over L2VPN and VPLS
    Best Answer

    Posted 09-25-2009 00:31
      |   view attached

    Hi Nick,

     

    you could write a firewall filter(see attachment) and apply it under routing-instance (see attachment).

     

    If this worked for you please flag my post as an "Accepted Solution" so others can benefit. A kudo would be cool if you think I earned it. 

     

    Kind Regards

    Michael Pergament

     

     

     

    Attachment(s)

    txt
    Example.txt   2 K 1 version


  • 3.  RE: Blocking STP BPDU's over L2VPN and VPLS

    Posted 09-26-2009 13:25

    Thanks Mike! That's exactly what I was looking for!

     

    Nick