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Re: [PWE3] new draft - Extension to LDP-VPLS for Ethernet broadcast & multicast

Bonjour Max,

Thanks for the input.

The intent of this document is to use P2MP PW selectively only when it can help with bandwidth optimisation (e.g where multiple PWs go through a common physical path).
This is intrinsically linked to the physical topology.

A ring topology, like you are suggesting is a good example where such optimisation may be beneficial.
Other physical topologies (like a physical tree structure where a network element is an
aggregation point for other network elements) may also benefit from the use of P2MP PWs.


We will add more details in the next version of the document on this point.

How about the two questions:
- do you see a need to optimise Ethernet broadcast/multicast traffic when using VPLS?
- would carriers with LDP-VPLS (RFC 4762) consider a solution that does not require BGP?

cheers,
Simon

2010/3/2 <mngpl at singnet.com.sg>
Simon,

I have a quick read on the document. On Figure 1 in the document, are the 4 PE nodes connected in a ring? I would presume so, since the chances of multiple PWE going through common LSP path is higer in a ring topology than any other topologies.

/Max
---  wrote:
Hi L2VPN & PWE3 workgroups,

There is a new internet draft - Extension to LDP-VPLS for Ethernetbroadcast
and multicast (*
http://tools.ietf.org/html/draft-delord-l2vpn-ldp-vpls-broadcast-exten-00*<http://tools.ietf.org/html/draft-delord-l2vpn-ldp-vpls-broadcast-exten-00>)
.

Our proposed approach relies on a simple extension to LDP-VPLS tooptimise
Ethernet Multicast/Broadcast traffic within a carrier's network. Itallows
the use of unidirectional point-to-multipoint PseudoWires tominimise
payload frame duplication on physical links.

The authors would like to solicit comments from the workgroups. In
particular,

- whether there is a need to optimise Ethernet broadcast/multicasttraffic
when using VPLS.

- whether carriers with LDP-VPLS (RFC 4762) would like to considera
solution that does not require BGP.

Thanks a lot.

Simon

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