A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Advertising Per-Topology and Per-Algorithm Label Blocks
Authors : Chris Bowers
Pushpasis Sarkar
Hannes Gredler
Uma Chunduri
Filename : draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt
Pages : 14
Date : 2015-10-05
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).
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-bowers-spring-adv-per-algorithm-label-blocks/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-bowers-spring-adv-per-algorithm-label-blocks-02
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-bowers-spring-adv-per-algorithm-label-blocks-02
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.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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