Link State Routing
charter-ietf-lsr-00-09

Document Proposed charter Link State Routing WG (lsr)
Title Link State Routing
Last updated 2018-02-09
State External review Initial chartering
WG State Proposed
IESG Responsible AD Alia Atlas
Charter Edit AD Alia Atlas
Telechat date On agenda of 2018-02-22 IESG telechat
Send notices to (None)

Charter
charter-ietf-lsr-00-09

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 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
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
functionality
    by adding OSPFv3 extensions using the OSPFv3 Extended LSAs.

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

5) Improvements to flooding (and other behaviors) to better support dense meshed
   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 needed. 

Proposed milestones

Date Milestone
Jul 2019 OSPFv3 Duall Stack (single instance)
Mar 2019 IS-IS Segment Routing SR YANG Model
draft-ietf-isis-sr-yang
Mar 2019 OSPF Segment Routing YANG Model
draft-ietf-ospf-sr-yang
Nov 2018 OSPFv2 Attribute Agility
draft-ietf-ospf-te-link-attr-reuse
Nov 2018 OSPFv3 SR to IESG
draft-ietf-ospf-ospfv3-segment-routing-extensions
Jul 2018 IS-IS Segment Routing MSD to IESG
draft-ietf-isis-segment-routing-msd
Jul 2018 IS-IS Reverse Metric to IESG
draft-ietf-isis-segment-routing-msd
Jul 2018 ISIS YANG model to IESG
draft-ietf-isis-yang-isis-cfg
Jul 2018 OSPF YANG Model to IESG
draft-ietf-ospf-yang