[j-nsp] P2MP LSP

[David water]

Mark,

Using those route types we can communicate about the source and destinations
in MVPN. Now as we know how to discover the source and receiver its time for
RSVP to take care of building the P2MP right? So RSVP does use the the BGP
discovered information to establish LSP, correct? So this way LSPs are
totally dynamic.

David W.

On Tue, Jun 29, 2010 at 1:21 PM, Mark Tinka <mtinka at globaltransit.net>wrote:

> On Tuesday 29 June 2010 11:43:49 pm David water wrote:
>
> > How the ingress node knows about all the egress Node?
> >  BGP?
>
> Yes, the MCAST-VPN address family ('inet-mvpn' in JUNOS)
> signals the MVPN BGP NLRI either between peers or between
> peers and route reflectors that support this AFI.
>
> > Now ingress node knows about the egress node then tunnel
> >  will be singaled using the RSVP so there must be
> >  interaction between BGP and RSVP right?
> >  If so then what
> >  kind of communication is it?
>
> P-tunnels transport MVPN traffic across a p2mp LSP from
> ingress to egress. The tunnel typically implemented by JUNOS
> for the NG-MVPN infrastructure is MPLS, signaled by RSVP-TE.
>
> The ingress/Sender PE router uses a new BGP attribute called
> PSMI (Provider Multicast Service Interface) to disseminate
> P-tunnel information to the egress/Receiver PE routers. The
> Receiver PE routers then join the P-tunnels, and become
> leaves of it.
>
> I-PMSI P-tunnels (inclusive) forward MVPN data to all PE
> routers in the RSI. S-PMSI P-tunnels (selective) can
> restrict this to only a group of PE routers in the RSI. Both
> options have their pros and cons, although inclusive tunnels
> tend to be more common (I think).
>
> On the control plane side, BGP is used to distribute
> Multicast routing information across the backbone, in
> effect, replacing PIM in the core.
>
> >  Any good link or documents?
> >  If any one has any good document to share that will be
> >  great help, I am looking for control plane communication
> >  between Egress nodes and Ingress node to establish P2MP
> >  LSP.
>
> These are great documents:
>
> http://www.juniper.net/us/en/local/pdf/whitepapers/2000320-
> en.pdf
>
> http://www.juniper.net/us/en/local/pdf/app-notes/3500142-
> en.pdf
>
> Cheers,
>
> Mark.
>



-- 
David W.