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Cell Relay Retreat>MPLS WG Archive>month:2001-Apr> msg00168



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Use of LDP for VPNs

  • From: Curtis Villamizar <curtis@workhorse.fictitious.org>
  • Date: Wed, 11 Apr 2001 15:07:22 -0400
  • cc: curtis@avici.com, Mark Duffy <mduffy@quarrytech.com>, "Herbst, Bill" <billh@netplane.com>, mpls@UU.NET


In message <200104111702.NAA06269@erosen-sun.cisco.com>, Eric Rosen writes:
> 
> Curtis> My understanding of the real reason  why we are using LDP for VPN is
> Curtis> that it had more to do  with the scalability of a particular RSVP/TE
> Curtis> implementation 
> 
> If you are speculating about the reason Cisco uses LDP in support of RFC2547
> VPNs, then I  can state authoritatively that this  has nothing whatsoever to
> do with any characteristic of any RSVP/TE implementation.  

Rather than vendor bashing, I've taken this offline.

Any historical reason for using LDP is not important.  RSVP/TE has
advantages and if scaling is not an issue, there are some that would
prefer to have the TE advantages and if TE extends to the edges not
have an extra protocol and label with no clear purpose.

Curtis