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Cell Relay Retreat>MPLS WG Archive>month:2001-Sep> msg00414



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LDP usage in MPLS based VPNs

  • From: Eric Rosen <erosen@cisco.com>
  • Date: Fri, 28 Sep 2001 14:26:01 -0400
  • cc: Eric Gray <egray@sandburst.com>, Ajay Simha <asimha@cisco.com>, Jay Karthik <jkarthik@avici.com>, MPLS mailing list <mpls@UU.NET>
  • User-Agent: EMH/1.10.0 WEMI/1.13.2 (Mochimune) FLIM/1.12.1(Nishinokyō) Emacs/20.6 (sparc-sun-solaris2.5.1)MULE/4.0 (HANANOEN)


Gee,  all Ajay and  I did  was to  describe a  case where  one needs  to use
multiple RDs for  the routes of a  single VPN.  So in that  case, one cannot
simply use the VPN-id as the RD.  No broader claims are implied.

In your rabbit picture, what you call R2 and R4 are what I called S1 and S2,
I think;  I meant  for S1,  S2, and  H to be  three PE  routers on  the same
service provider network, hence in the same AS. 

For a description  of how to embed a VPN-id in  an RD, see draft-ietf-ppvpn-
bgpvpn-auto-00.txt.