[c-nsp] mpls on RR ?

[Marek Tyban]

Hi,

I hope there is no reason to have MPLS enabled on RR. You know, packet
destined to RR is processed by control plane, so the MPLS header must be
stripped out anyway. In case of plain IPv4 over MPLS and MPLS/LDP enabled on
RR interfaces, then RR should act as egress LSR and egress LSR send implicit
null for their connected and summarized routes by default. It means that the
packet arrive at the RR as IPv4 packet. If you don't have MPLS enabled on
the RR the packet arrive as IPv4 again, so there is no difference and for
both cases the packet should transit MPLS Network as labeled/MPLS packet.


Best Regards,
Marek


2010/11/16 selamat pagi <ketimun at gmail.com>

> Let me rephrase my question>
> if RR not in forwarding path, is there a reason for MPLS on RR
>
>
>
> 2010/11/16 Stephen.Chen <cisco.csa at gmail.com>
>
> > yes，core routers always act  RR， when no additional investment for
> network
> > construction
> >
> >
> >
> > Stephen.Chen
> >
> > 2010/11/16 selamat pagi <ketimun at gmail.com>
> >
> > Now, I came across some examples with mpls enabled on RR and want to
> verify
> >> if there are
> >> reasons for enabling MPLS in network offering Internet-accees and L3VPNs
> >>
> >
> >
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