The MPLS WG Archive

["Bisewski, Radoslaw" <Radoslaw.Bisewski@intel.com>]

CR-LDP is functionaly equivalent to RSVP-TE. However the advantage of the
CR-LDP over the RSVP-TE is that CR-LDP is an extension to the existing LDP
protocol.
LDP with CR-LDP extensions gives you one protocol implementation, which
handles both automatic generation of LSP based on routing table and TE. On
the other side ( LDP and RSVP-TE) you will have two different protocols
serving two different purposes. I'm not sure if the second approach (LDP and
RSVP-TE) is the optimal one.

Radek

> -----Original Message-----
> From: David Charlap [mailto:david.charlap@marconi.com]
> Sent: Thursday, July 25, 2002 4:42 PM
> To: IETF MPLS List
> Subject: Re: initiating a discussion on mpls singaling protocols
> 
> 
> Bisewski, Radoslaw wrote:
> > But CR-LDP is an extension to the LDP protocol. While 
> RSVP-TE has nothing in
> > common with LDP. After "eliminating" CR-LDP you will still 
> have two MPLS
> > signalling protocols MPLS LDP and RSVP-TE.
> 
> So?  These two serve very different purposes and are not redundant.
> 
> LDP automatically generates LSPs based on the routing table.
> 
> RSVP-TE generates traffic-engineered LSPs based on requests from an 
> ingress router.
> 
> -- David
>