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Cell Relay Retreat>MPLS WG Archive>month:2002-May> msg00254



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Basic LDP Question

  • From: Yakov Rekhter <yakov@juniper.net>
  • Date: Fri, 31 May 2002 11:11:36 -0700
  • cc: Shahram Davari <Shahram_Davari@pmc-sierra.com>, "'mpls@uu.net'" <mpls@UU.NET>, "'ppvpn@ppvpn.francetelecom.com'" <ppvpn@ppvpn.francetelecom.com>

Vijay,

> In the 2547 case, typically u have 2 labels, the vpn_label (bottom label)
> and the top label is the label to get the packet to the far end PE, Now,
> LDP is used for this top label.
> 
> I think u are questioning why use LDP for this bottom_label and why not
> simply encapsulate the MPLS packet in IP to get the packet to the next_hop
> PE. If this is your Q, You are absolutely correct and this is what the
> following draft talks about
> 
> http://search.ietf.org/internet-drafts/draft-ietf-ppvpn-gre-ip-2547-01.txt

Glad you mentioned this draft, as Section 7 in that draft talks about
the issue of packet spoofing.

Yakov.