Link State Routing

The information below is for an older proposed charter
Document Proposed charter Link State Routing WG (lsr) Snapshot
Title Link State Routing
Last updated 2018-01-24
State Draft Charter Rechartering
WG State Active
IESG Responsible AD Alvaro Retana
Charter Edit AD Alia Atlas
Send notices to (None)


The Link-State Routing (LSR) Working Group is chartered to document
current protocol implementation practices and improvements, protocol usage
scenarios, maintenance and extensions of link-state routing interior gateway
protocols (IGPs) with a focus on IS-IS, OSPFv2, and OSPFv3.  The LSR Working
Group is formed by merging the isis and ospf WGs and will take on all their
existing adopted work at the time of chartering.

IS-IS is an IGP specified and standardized by ISO through ISO 10589:2002 and
additional RFC standards with extensions to support IP that has been deployed
in the Internet for decades.  For the IS-IS protocol, LSR-WG’s work is focused
on IP routing, currently based on the agreement in RFC 3563 with ISO/JTC1/SC6.
The LSR-WG will interact with other standards bodies that have responsible for
standardizing IS-IS. LSR-WG will continue to support Layer 2 routing (for
example TRILL work) as needed.

OSPFv2 [RFC 2328 and extensions], is an IGP that has been deployed in the
Internet for decades. OSPFv3 [RFC5340 and extensions] provides OSPF for IPv6
and IPv4 [RFC5838] which can be delivered over IPv6 or IPv4 [RFC 7949].

The LSR Working Group will generally manage its specific work items by
milestones agreed with the responsible Area Director.

In addition to ongoing maintenance, the following topics are expected to be
among the work-items at the time of chartering.

1) Improving OSPF support for IPv6 and extensions using OSPFv3 LSA
Extendibility. 2) Extensions needed for Segment Routing and associated
architectural changes 3) YANG models for IS-IS, OSPFv2, and OSPFv3 and
extensions 4) Extensions for source-destination routing
[draft-ietf-rtgwg-dst-src-routing] 5) Potentially, extensions to better support
specific network topologies such as ones commonly used in data centers.

The Link-State Routing (LSR) Working Group will coordinate with other working
groups, such as RTGWG, SPRING, MPLS, TEAS, V6OPS, and 6MAN, to understand the
need for extensions and to confirm that the planned work meets the needs. 
LSR-WG will coordinate with CCAMP and BIER on their extensions to the LSR IGPs
as applicable to LSR protocol operation and scale.  LSR-WG should coordinate
with other WGs as needed.