Routing

Expand all | Collapse all

[MX] How to bind a VPLS to MPLS virtual-router

  • 1.  [MX] How to bind a VPLS to MPLS virtual-router

    Posted 22 days ago

    Hello there,

     

    I'm having Juniper MX204 and the goal is to separate existing running IP routing and MPLS domain. So, I created new virtual-router then configured MPLS under routing-instance. Since MPLS is up on a non-default instance, I am seeking idea/advice about how can we bind a VPLS instance with this virtual-router?

     

    Regards,



  • 2.  Re: [MX] How to bind a VPLS to MPLS virtual-router

    Posted 22 days ago

    Hello,

    I suggest You don't go along this path (separate routing-instances just for MPLS).

    The reasons are:

    1/ All MPLS protocols also rely on IGP (except static MPLS LSP) so You are looking at another IGP inside Your "MPLS routing instances"

    2/ routing-instances do not provide 100% separation since they share the common Routing Protocol Daemon process

    3/ only LDP is supported inside JUNOS routing instances so no traffic engineering of any sort.

    4/ if You plan to run IP internet access/peering service in Your network, then all routers must have full IP routing tables for optimal routing, so no BGP-free core is possible.

    The current best practice is to run MPLS transport for all services including IP internet access, making use of BGP-free core which then could be built on low-latency boxes.

    HTH

    Thx

    Alex  



  • 3.  Re: [MX] How to bind a VPLS to MPLS virtual-router

    Posted 22 days ago

    Dear Alex,

     

    Thanks for your explanation. If this is not a recommended solution, do you have any idea or comment if I go with Logical System?

     

    Regards,



  • 4.  Re: [MX] How to bind a VPLS to MPLS virtual-router

    Posted 22 days ago

    Hello,

    As I said earlier, the best current practice is to run services over MPLS PE-to-PE + BGP-free core.

    But if You are really brave then You could try services (incl IPv4) over MPLS transport with IPv6-only control plane.

    If You want to go with JUNOS Logical Systems then it is slightly better than routing instances but:

    1/ You could run into some JUNOS features not supported inside LS

    2/ if later You'd need to interconnect IP Logical System with MPLS Logical System for whatever reason, then You need to account for JUNOS BGP AS_PATH loop detection I described here    https://forums.juniper.net/t5/Routing/different-autonomous-system-number-for-each-routing-instance/m-p/482445#M22439 

     

    HTH

    Thx

    Alex



  • 5.  Re: [MX] How to bind a VPLS to MPLS virtual-router

    Posted 22 days ago

    Dear Alex,

     

    Thanks and appreciated for your input.

     

    Regards,