A new IETF WG has been formed in the Routing Area. For additional
information, please contact the Area Directors or the WG Chairs.

Link State Routing (lsr)
Current status: Proposed WG

  Acee Lindem <a...@cisco.com>
  Christian Hopps <cho...@chopps.org>

Assigned Area Director:
  Alia Atlas <akat...@gmail.com>

Routing Area Directors:
  Alia Atlas <akat...@gmail.com>
  Alvaro Retana <aretana.i...@gmail.com>
  Deborah Brungard <db3...@att.com>

Mailing list:
  Address: l...@ietf.org
  To subscribe: https://www.ietf.org/mailman/listinfo/lsr
  Archive: https://mailarchive.ietf.org/arch/browse/lsr/

Group page: https://datatracker.ietf.org/group/lsr/

Charter: https://datatracker.ietf.org/doc/charter-ietf-lsr/

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

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
responsibility 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 specific
work-items for the WG.

1) Improve OSPF support for IPv6  and create at least parity with IPv4
    by adding OSPFv3 extensions using the OSPFv3 Extended LSAs.

2) Extensions needed for Segment Routing and associated architectural changes

3) YANG models for the management of IS-IS, OSPFv2, and OSPFv3 and extensions

4) Extensions for source-destination routing

5) Improvements to flooding (and other behaviors) to better support dense
   network topologies, such as are commonly used in data centers.

The Link-State Routing (LSR) Working Group will coordinate with other working
groups, such as RTGWG, SPRING, MPLS, TEAS, PCE, V6OPS, and 6MAN, to
understand the need for extensions and to confirm that the planned work meets
the needs and is compatible with IS-IS and/or OSPF from functional,
architectural and performance point of views.  LSR-WG will coordinate with
CCAMP, TEAS, 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


  Jul 2018 - OSPF YANG Model to IESG

  Jul 2018 - ISIS YANG model to IESG

  Jul 2018 - IS-IS Reverse Metric to IESG

  Jul 2018 - IS-IS Segment Routing MSD to IESG

  Nov 2018 - OSPFv3 SR to IESG

  Nov 2018 - OSPFv2 Attribute Agility

  Mar 2019 - OSPF Segment Routing YANG Model

  Mar 2019 - IS-IS Segment Routing SR YANG Model

  Jul 2019 - OSPFv3 Dual Stack (single instance)

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