Subject: [spring] FW: New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt

From: Chris Bowers <[email-masked]>
Date: Mon, 5 Oct 2015 19:30:41 +0000

SPRING WG,

There was quite a lot of discussion in person after we presented draft-bowers-spring-adv-per-algorithm-label-blocks-01 in Prague, and there was also much discussion on this list about the issue raised by this draft.  We have made two main additions to this revision of the draft to further this discussion.

1) We have included discussion of multiple topologies in addition to multiple algorithms, and we have modified the proposed ISIS extension to handle both multiple topologies and multiple algorithms.  

2) We have tried to accurately describe a proposal, which was outlined on this list, for managing the assignment of per-topology/per-algorithm node index values, which we refer to as the "configured offset mapping method".

We welcome feedback from the working group on this draft.

Thanks,
Chris

-----Original Message-----
From: [email-masked] [mailto:[email-masked]] 
Sent: Monday, October 05, 2015 2:05 PM
To: Uma Chunduri <[email-masked]>; Hannes Gredler <[email-masked]>; Pushpasis Sarkar <[email-masked]>; Chris Bowers <[email-masked]>; Chris Bowers <[email-masked]>; Uma Chunduri <[email-masked]>; Pushpasis Sarkar <[email-masked]>; Hannes Gredler <[email-masked]>
Subject: New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt

A new version of I-D, draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt
has been successfully submitted by Chris Bowers and posted to the IETF repository.

Name:		draft-bowers-spring-adv-per-algorithm-label-blocks
Revision:	02
Title:		Advertising Per-Topology and Per-Algorithm Label Blocks
Document date:	2015-10-05
Group:		Individual Submission
Pages:		14
URL:            https://www.ietf.org/internet-drafts/draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt
Status:         https://datatracker.ietf.org/doc/draft-bowers-spring-adv-per-algorithm-label-blocks/
Htmlized:       https://tools.ietf.org/html/draft-bowers-spring-adv-per-algorithm-label-blocks-02
Diff:           https://www.ietf.org/rfcdiff?url2=draft-bowers-spring-adv-per-algorithm-label-blocks-02

Abstract:
   When segment routing is used in a network that is controlled by a
   link state IGP (such as ISIS or OSPF), each node in the network can
   be assigned one or more index numbers, known as "node-SIDs".  The
   node-SIDs are unique within the network, and are known to all the
   nodes in the network.  If an ingress node has a data packet to be
   sent to an egress node, the ingress node may select a node-SID
   corresponding to the egress node, and "translate" that node-SID to an
   MPLS label.  The MPLS label represents a particular path to the
   egress node; the path is determined by applying a routing algorithm
   to a particular view of the network topology and a particular set of
   metric assignments to the links of that topology.  The packet can
   then be forwarded by pushing the label on the packet's label stack
   and transmitting the packet to the next hop on the corresponding path
   to the egress node.  This document compares two different procedures
   for translating a node-SID to the MPLS label that represents a path
   chosen by a particular algorithm operating on a particular topology.
   It also specifies the ISIS extensions needed to support one of the
   procedures (known as the "per-topology/per-algorithm label block"
   procedure).

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