The MPLS WG Archive

[Albert Tian <tian@redback.com>]

Hi,

We just puhlished the following draft. This is a new scheme to create source
routed MPLS LSPs in a LDP enabled network using a stack of labels. It requires
each router to allocate a domain wide unique label (or may be two) for its
loopback address, and let LDP to honor the same binding during propergation.
Since it is source routed, there is no signalling overhead.

This source routed LSP can be either strict or loose, or mixed. It can be used
in a number of applications, including building bypass/repair paths for fast
reroute in IP/LDP network. 

The scheme largely uses existing mpls mechanisms, the impact on the forwarding
plane should be minimal.

Please let us know if you have any comments.

Thanks,

Albert

-------- Original Message --------
Subject: I-D ACTION:draft-tian-mpls-lsp-source-route-00.txt
Date: Wed, 26 May 2004 15:55:43 -0400
From: Internet-Drafts@ietf.org
Reply-To: internet-drafts@ietf.org
To: i-d-announce@ietf.org

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


	Title		: Source Routed MPLS LSP using Domain Wide Label
	Author(s)	: A. Tian
	Filename	: draft-tian-mpls-lsp-source-route-00.txt
	Pages		: 12
	Date		: 2004-5-26
	
One advantage that MPLS provides is that it allows traffic to be
   directed through an explicit path that deviates from IP routing.
   Such ability is widely used in traffic-engineering and fast-reroute.
   Currently signaling protocols such as RSVP is needed to establish and
   maintain such an explicit Label Switched Path. When there are a large
   number of such signaled LSPs in the network, the aggregated signaling
   and maintenance overhead can be significant.

   In this paper, we propose a way to establish a source routed explicit
   path with zero signaling overhead. The scheme uses a stack of labels
   and requires domain wide LDP FEC to label bindings.

A URL for this Internet-Draft is:
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