Transcript OSPF Protocol Evolution WG Re-Charter Acee Lindem/Cisco Systems OSPF WG - IETF 66

OSPF Protocol Evolution
WG Re-Charter
Acee Lindem/Cisco Systems
OSPF WG - IETF 66
OSPF Extension Chronology

RFC 1247, RFC 1583, RFC 2178, and RFC 2328 –
Evolution of base OSPFv2 protocol






Area Hierarchy with full link state topology within an
area
5 Basic LSA Types
32 bit aligned fields
RFC 1584 - MOSPF adds Multicast trees and Type
6 LSAs
RFC 1583 Adds NSSAs and Type 7 LSAs
RFC 2370 – Adds Opaque LSAs with flooding
scope built into types. Backward compatible
introduction of new LSAs
OSPF WG - IETF 66
OSPF Extension Chronology

RFC 2740 – OSPFv3








Generalized flooding of unknown LSAs
LSID no longer denotes route prefix
Separation of intra-area topology and prefix information
RFC 3623 – OSPFv2 Graceful Restart – Uses link
scoped opaque LSA.
RFC 3630 – OSPFv2 Traffic Engineering Uses area
scoped LSAs
OSPFv2 as PE/CE Protocol - RFC Editor Queue
OSPFv2 MTR – Reuses TOS routing metrics
OSPFv3 Authentication using IPSec - RFC Editor
Queue
OSPF WG - IETF 66
OSPFv2 Evolution - Goals




Full Backward Compatibility
Introduction of REQUIRED functionality with
consideration of the large deployed base
Extensions for routing and TE information
Prudence in allowing additional information
carried in OSPFv2 - Not a generalized intradomain flooding mechanism.
OSPF WG - IETF 66
OSPFv2 Evolution - New Charter Items

Link Local Signaling as Standards Track


OSPF Capabilities Advertisement - Advertise node
capabilities for options that won’t fit.



draft-ietf-ospf-mt-06.txt
draft-rawat-ospf-mt-mib-00.txt
OSPF Additional Route Attributes


draft-ietf-ospf-cap-08.txt
OSPF Multiple Topology Routing/MIB


draft-ietf-ospf-lls-01.txt
draft-mirtorabi-ospf-tag-00.txt
OSPFv2 use of IPSec

Draft in progress
OSPF WG - IETF 66
OSPFv3 Evolution - Goals





Backward Compatibility - Inherent in OSPFv3
Introduction of REQUIRED functionality
Extensions for routing and TE information
Evolution to generalized TLV Based Protocol
supporting multiple address families/topologies
Equitable granularity of advertisement with TLV




LSA Type extension for new functions
TLV Type extension for existing LSA Information
Target protocol for MANET extensions
Still NOT a generalized flooding mechanism Need to use prudence in selecting what is
advertised.
OSPF WG - IETF 66
OSPFv3 Evolution - New Charter Items

Link Local Signaling as Standards Track


OSPF Capabilities Advertisement - Advertise node
capabilities for options that won’t fit.


draft-ietf-ospf-cap-08.txt
OSPFv3 Multiple Topology Routing/Address Family MIB



draft-ietf-ospf-lls-01.txt
draft-ietf-ospf-af-alt-03.txt (Multi-Instance - interim solution)
draft-ietf-ospf-mt-ospfv3-01.txt (Supports TLVs - additional attributes)
OSPFv3 MANET Extensions


WG stalled - No agreement
Implementation/Adoption Momentum slowed
OSPF WG - IETF 66
OSPF WG Vision – Single IP IGP
Enterprise/ISP/Wireless Networks
OSPFv3
MANET
Attributes
Multi-AF/MTR
TLV Extensions
OSPFv3 Base
OSPF WG - IETF 66
Activities Outside OSPF WG




ASON (Automatic Switched Optical Networks)
Requirements
OSPF in limited Environments (e.g., L1VPNs)
MANET Developments
Others?
OSPF WG - IETF 66
Charter Strawman
Description of Working Group:
The OSPF Working develops and documents extensions and
bug fixes to the OSPF protocols as well as documenting OSPF usage
scenarios. The specific protocol work items area listed in the Goals and
Milestones section below. Additional work items will require rechartering.
 Goals and Milestones:
 Done
Gather operational experience with the OSPF protocol and
submit the document as an Informational RFC.
 Done
Develop multiple implementations, and test against each
other.
 Done
Design the routing protocol, and write its specification.
 Done
Obtain performance data for the protocol.
 Done
Make changes to the specification (if necessary) and publish
the protocol as a Draft Standard RFC.
OSPF WG - IETF 66
Charter Strawman (Continued - #1)







Done
Submit OSPF for IPv6 to IESG for consideration as a
Standard.
Done
Update the OSPF NSSA option specified in RFC 1587 and
submit to IESG for consideration as a Proposed Standard
Done
Develop Traffic Engineering extensions for OSPFv2 and
submit it to the IESG as a Proposed Standard
Done
Submit to IESG a document which updates RFC 1793
allowing detection of demand circuit neighbors whose OSPF process has
exited.
Done
Submit to IESG a BCP advocating that OSPF LSA
refreshes be spread out over time
Done
Develop a hitless restart mechanism for OSPF and submit it
to the IESG as a Proposed Standard.
Done
Document Alternative ABR implementations and submit ti
IESG as an Informational RFC
OSPF WG - IETF 66
Charter Strawman (Continued #2)









Done
Extend the hitless restart mechanism to OSPFv3 and submit
it to the IESG as a Proposed Standard
Done
Develop Traffic Engineering extensions for OSPFv3 and
submit it to the IESG as a Proposed Standard.
Done
Submit to IESG a BCP advocating that OSPF Hellos be given
preference over other OSPF control traffic.
Done
Update OSPFv2 MIB and submit to IESG as a Standard,
replacing RFC 1850
Done
Specify IPSEC usage with OSPFv3 and submit to IESG for
consideration as a Proposed Standard
July 2007
Develop OSPF for IPv6 MIB and submit to IESG for
consideration as a Proposed Standard.
Mar 2007
Develop an IPSec based authentication for OSPFv2
and submit to IESG for consideration as a Proposed Standard.
Done
Develop OSPFv2 Multiple Topology Routing (MTR)
specification and submit to IESG for consideration as a Proposed Standard.
Done
Develop OSPF Capabilities Advertisement specification and
submit to IESG for consideration as a Proposed Standard
OSPF WG - IETF 66
Charter Strawman (Continued #3)






Mar 2007
Develop a multiple instance OSPFv3 Multiple
Topology Routing (MTR) specification and submit to IESG for consideration
as a Proposed Standard.
Mar 2007
Advance Link Local Signalling (LLS) from
experimental status and submit to IESG for consideration as a Proposed
Standard.
July 2007
Develop a OSPFv2 Multiple Topology Routing (MTR)
MIB specification and submit to IESG for consideration as a Proposed
Standard.
July 2007
Develop OSPFv3 protocol enhancements to reduce
flooding overhead and adjacencies in a MANET environment for
consideration as a Proposed Standard.
Nov 2007
Develop OSPFv2 protocol enhancement for
optionally associating additional attributes with routes/link and submit to
IESG for consideration as a Proposed Standard.
Mar 2008
Develop a single instance OSPFv3 Multiple
Topology Routing (MTR) specification and submit to IESG for consideration
as a Proposed Standard
OSPF WG - IETF 66