A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking Working Group of the IETF.
Title : Segment Routing Architecture
Authors : Clarence Filsfils
Stefano Previdi
Bruno Decraene
Stephane Litkowski
Rob Shakir
Filename : draft-ietf-spring-segment-routing-04.txt
Pages : 21
Date : 2015-07-31
Abstract:
Segment Routing (SR) leverages the source routing paradigm. A node
steers a packet through an ordered list of instructions, called
segments. A segment can represent any instruction, topological or
service-based. A segment can have a local semantic to an SR node or
global within an SR domain. SR allows to enforce a flow through any
topological path and service chain while maintaining per-flow state
only at the ingress node to the SR domain.
Segment Routing can be directly applied to the MPLS architecture with
no change on the forwarding plane. A segment is encoded as an MPLS
label. An ordered list of segments is encoded as a stack of labels.
The segment to process is on the top of the stack. Upon completion
of a segment, the related label is popped from the stack.
Segment Routing can be applied to the IPv6 architecture, with a new
type of routing extension header. A segment is encoded as an IPv6
address. An ordered list of segments is encoded as an ordered list
of IPv6 addresses in the routing extension header. The segment to
process is indicated by a pointer in the routing extension header.
Upon completion of a segment, the pointer is incremented.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-spring-segment-routing-04
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-spring-segment-routing-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
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