The MPLS WG Archive

["LE ROUX Jean-Louis RD-CORE-LAN" <jeanlouis.leroux@orange-ftgroup.com>]

Title: TR: I-D ACTION:draft-leroux-mpls-p2mp-te-autoleaf-02.txt

Hi all,

Find below a new version of the auto-leaf draft that defines IGP extensions for automatic discovery of leaf LSRs.

Here are the major changes since last version:
-The scope of the Leaf Group has been extended. It now refers to a set of LSRs, acting as leaves of a series of one or more P2MP LSPs. This is to encompass the case where there are several ingress LSRs with same set of leaf LSRs (e.g. TV broadcasting with several regional sources).

-The motivations have been clarified.
-The TLV format has been modified so as to factorize the leaf address.
-Considerations on the number of Leaf Groups and the frequency of changes have been added. It is recommended to implement rate limiting and dampening mechanism so as to avoid any unnaceptable impact on the IGP.

-The security section has been detailed.
-A new co-author joined the draft.
-Plus a few edits for the sake of clarity.

We are waiting for comments/feedbacks

Best Regards,

JL

A New Internet-Draft is available from the on-line Internet-Drafts
directories.




        Title           : IGP Routing extensions for discovery of P2MP TE LSP Leaf LSRs
        Author(s)       : J. Le Roux, et al.
        Filename        : draft-leroux-mpls-p2mp-te-autoleaf-02.txt
        Pages           : 12
        Date            : 2006-10-22
       
In various situations, such as TV broadcasting with several regional
   sources, it is required to setup a series of Point-To-MultiPoint
   (P2MP) Traffic Engineering Label Switched Paths (TE LSPs) between a
   set of head-end Label Switching Routers (LSRs) and a group of leaf
   LSRs referred to as a Leaf Group. Setting up such a series of P2MP TE
   LSPs requires for the set of head-end LSRs to be aware of all leaf
   LSRs, which may lead to the cumbersome configuration of a potentially

   large number of leaf LSRs on each head-end LSRs. Furthermore leaf
   LSRs may want to dynamically join or leave a Leaf Group without
   requiring manual configuration on the head-end LSRs. This document
   specifies IGP routing extensions for IS-IS and OSPF so as to provide
   an automatic discovery of the set of leaf LSRs members of a Leaf
   Group, in order to automate the creation and modification of a series
   of P2MP TE-LSPs.

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