I-D Action: draft-previdi-filsfils-isis-segment-routing-00.txt
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Subject: I-D Action: draft-previdi-filsfils-isis-segment-routing-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Segment Routing with IS-IS Routing Protocol
Author(s) : Stefano Previdi
Clarence Filsfils
Ahmed Bashandy
Martin Horneffer
Bruno Decraene
Stephane Litkowski
Igor Milojevic
Rob Shakir
Saku Ytti
Filename : draft-previdi-filsfils-isis-segment-routing-00.txt
Pages : 27
Date : 2013-03-12
Abstract:
Segment Routing (SR) enables any node to select any path (explicit or
derived from IGPs SPT computations) for each of its traffic classes.
The path does not depend on a hop-by-hop signaling technique (neither
LDP nor RSVP). It only depends on a set of "segments" that are
advertised by the IS-IS routing protocol. These segments act as
topological sub-paths that can be combined together to form the
desired path.
There are two forms of segments: node and adjacency. A node segment
represents a path to a node. An adjacency segment represents a
specific adjacency to a node. A node segment is typically a multi-
hop path while an adjacency segment is a one-hop path. SR's control-
plane can be applied to IPv6 and MPLS dataplanes.
Segment Routing control-plane can be applied to the MPLS dataplane: a
node segment to node N is instantiated in the MPLS dataplane as an
LSP along the shortest-path (SPT) to the node. An adjacency segment
is instantiated in the MPLS dataplane as a cross-connect entry
pointing to a specific egress datalink.
This document describes the Segment Routing functions, a set of use
cases it addresses and the necessary changes that are required in the
IS-IS protocol.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-previdi-filsfils-isis-segment-routing
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-previdi-filsfils-isis-segment-routing-00
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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