Cisco VPLS Multicast using RSVP P2MP & m-LDP M2MP TE !
I am trying to understand and find solution for implementing VPLS Multicast using RSVP P2MP TE & m-LDP M2MP TE but unfortunately I have
not been able to get any Online Documentation Implenation for this Technology (I always end up getting very good Junos docs for same which I don;t want )
Welll if anyone can give me some more insight into this along with a good technical implementation doc.
Here is what I understand--To overcome the issue of packet replication at the Ingress PE withhin the VPLS Instance we tend to use the Multipoint TE
Tunnels which will overcome the packet replication issue by utilising these underlying MP TE Tunnels. Now what confuses me is since VPLS is L2
how do we make the L2 VPLS interact with the underlying MP TE toplolgy for multicast packet routing.Essentially what it appears to me is that we are making the L2 VPLS services of Customers interact with the underlying SP's MP TE Topology. Under RSVP P2MP TE , the Multicast Groups needs to be added to the P2MP Head End and which is not part of VPLS Instance.I think we should be buliding the MDTs per VPLS Instance which will create a P2MP Toplogy for RSVP or M2MP Topology for m-LDP. My question is if I am have to use MDTs as I am thinking do we have an option to define MDTs inside the VPLS Instance , the same way as we do for NGN MVPNs.
l2 vfi vplsmcast autodiscovery
mdt preference mldp
mdt default mpls mldp 'opaue_address
for RSVP P2MP TE
I have no clue as I have still not been able to implement NGN MVPN using P2MP RSVP TE and I can't think how we can make use of it for VPLS Multicast either.
I may not be correct in my thought process but again till now I never got any Cisco Document to help me understand this.
Hope someone will guide me out here with correct concept and implementation.
Re: Cisco VPLS Multicast using RSVP P2MP & m-LDP M2MP TE !
Efficient replication of Multicast traffic on layer-2 VPLS domains is still a challenge IETF is working on - at the moment unfortunately it is sent as a broadcast in VPLS.
There are few internet drafts namely the "Simon/Raymond" one and another which snoops on Layer-3 information to build an efficient L2 multicast tree in VPLS network. But they are all drafts - nothing ratified by IETF as an RFC yet
If you want a true label-switched multicast that is standardized, your best option is to use layer-3 mLDP or RSVP-TE
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