[j-nsp] MVPN Interoperability Issue

Stefan Fouant sfouant at gmail.com
Fri Oct 16 16:27:16 EDT 2009

Great!  Thanks for all the feedback... Now its off to the lab for me
to get this running... which may ultimately lead me to recommend
swapping out the 7600 P Routers for Juniper MXs. :)


On 10/16/09, John Frame <jframe at juniper.net> wrote:
> Yes, you only need a single GRE tunnel between PEs which can carry multiple
> P2MP LSPs.
> On Oct 16, 2009, at 12:37 PM, Stefan Fouant wrote:
> On Fri, Oct 16, 2009 at 3:17 PM, John Frame
> <jframe at juniper.net<mailto:jframe at juniper.net>> wrote:
> Actually it is possible to support BGP-MVPNs over a non-P2MP capable
> core by using GRE tunnels.  Each PE would require a Tunnel PIC to
> support both the GRE requirement and the vt interface must be used in
> the routing instance - however if you are using MXs then it is built
> in already on the DPCs.  If Inclusive trees are used, then P2MP
> branches are built statically, but automatic trees can be built if
> using a Selective tree.
> In the GRE approach, do we have the ability to aggregate multiple MVPNs into
> a single Inter-PE GRE tunnel?
> Thanks,
> --
> Stefan Fouant

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Stefan Fouant

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