Technical Summary
This draft describes an optional mechanism within ISIS used today
by many ISPs for IGP routing within their clouds. This draft
describes how to run within a single ISIS domain a set of
independent IP topologies that we call Multi-Topologies (MTs).
This MT extension can be used for variety of purposes such as an
in-band management network ``on top'' of the original IGP topology,
maintain separate IGP routing domains for isolated multicast or
IPv6 islands within the backbone, or force a subset of an address
space to follow a different topology.
Working Group Summary
This document has had several Last Calls in the WG. The WG has
consensus on advancing this document. Comments were received
during IETF Last Call and the spec was revised accordingly.
Protocol Quality
Alex Zinin and Bill Fenner reviewed this document for the IESG.
There are at least two implementations.
RFC-Editor Note:
Section 7.1. Multi-Topology TLV, last para:
OLD:
This MT TLV can advertise up to 127 MTs and it can occur multiple
times if needed within IIHs and LSP fragment zero. The result MT
NEW:
This MT TLV can advertise up to 127 MTs. It is announced in IIHs
and LSP fragment 0, and can occur multiple times. The result MT