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Question on the use of multiple L2VPN sites within the same routing instance.

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This thread has been viewed 11 times
  • 1.  Question on the use of multiple L2VPN sites within the same routing instance.

     
    Posted 11-26-2021 11:33

    Hi.

     

    I have two CE-facing interfaces in my L2VPN routing instance. Both CE-facing interfaces are configured under the same site (SITE-A) as follows (I'm using LT interfaces in my setup since I don't have real cables).:

     

    set routing-instances VPN-A protocols l2vpn site SITE-A site-identifier 1

    set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.2 remote-site-id 2

    set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.4 remote-site-id 3

     

    This leads to a unique incoming (from MPLS core) pseudowire label per CE-facing interface. Connectivity is successful amongst all customer sites.

     

     

    Now I change my configuration to have my CE-facing interfaces in different sites (SITE-A and SITE-B) but still within the same routing instance.

     

     

    set routing-instances VPN-A protocols l2vpn site SITE-A site-identifier 1

    set routing-instances VPN-A protocols l2vpn site SITE-A interface lt-0/0/0.2 remote-site-id 2

    set routing-instances VPN-A protocols l2vpn site SITE-B site-identifier 4

    set routing-instances VPN-A protocols l2vpn site SITE-B interface lt-0/0/0.4 remote-site-id 3

     

    This still leads to a unique incoming (from MPLS core) pseudowire label per CE-facing interface. Connectivity amongst all sites of the customer is intact. So the same as in the first scenario.

     

     

    So my question is.. within a single routing instance, in what condition would I need to keep both my CE-facing interfaces in different sites instead of a single site?

     

    Thanks,

    Deepak



  • 2.  RE: Question on the use of multiple L2VPN sites within the same routing instance.
    Best Answer

    Posted 11-29-2021 05:32
    hi Deepak,
    in your case I think that the difference is more for the administration side than technical side, so you could put all sites from a specific customer in single routing-instance, identifying that customer by that routing-instance, thus facilitating troubleshooting later.

    ------------------------------
    Eduardo Haro
    ------------------------------



  • 3.  RE: Question on the use of multiple L2VPN sites within the same routing instance.

     
    Posted 11-29-2021 14:50
    Thanks Eduardo.