Subject: Routing Area Report
Date: Mon, 1 Apr 1996 11:58:42 +0500

RIP -
Gary Malkin Chair
The RIP WG met on Tuesday, 3/5, from 1730-1800. We began with a presentation of the agenda and of the current documents associated with the group's charter.

RIP-2 (RFC 1723) is still waiting for the inclusion of introductory material from RFC 1058. Once this is done, RIP-2 (all RFCs) can be submitted for consideration as full Standards. 

The RIPng Internet Draft has been updated with comments from the last call. A few more things need to be added before a new I-D can be published. Following a new last call, it will be ready for submission for consideration as a Proposed Standard. 

Gerry Meyer will make a few editorial changes to the Triggered RIP I-D. After the new I-D is published, it will be submitted for consideration as a Proposed Standard.

OSPF -
John Moy Chair, Rob Coltun lead the meeting The OSPF WG met on Monday and discussed the Opaque LSA, Cut-Through Advertisements and OSPF Version 3 For IP Version 6. 

Rob Coltun presented the following two proposals. Opaque LSA
The updates to the current draft were given which included: 

- removing the interface address from the link-local Opaque type given the comments from the last meeting this can be derrived from the receiving interface. This change also removes the restriction of the link-local LSA only being useful on multi-access networks. 

- The Opaque LSA scoping values were made equivalent to those of the OSPF version 3.

Cut-Thru Advertisements
A brief overview was given of the Cut-Thru Advertisement draft (which is soon to be released).

No adverse reactions to the above two proposals. 

Rob and Dennis then presented the OSPF version 3 draft. Besides for the issues of cleaning up the draft the only issue was to put the tag back into the AS external LSA which is handy for policy filtering. The view of the room was that the protocol was very well designed and that the implementation of version 3 from version 2 would probably be smooth.

After the meeting a few vendors said that they would start implementations fairly soon and were interested in feeding comments into the draft in the short term.

Two important issues were brought up after the meeting which were: 

1) how would customers transition from OSPF v2 to OSPF v3 2) With OSPF v3, small routers carefully size their OSPF memory utilization based on the known number of LSAs and the topology size. What are the issues for small routers now that LSAs can be introduced with a flood/don't flood if unknown bit, which is controlled by the sender.

Inter-Domain Routing Working Group -
Sue Hares and Yakov Rekhter charirs
Working group met with agenda:

BGP-4 MIB
IDRP for IP Draft
IDRP Confederations
Destination Preference Attribute

Status of documents:

BGP-4 MIB (draft-ietf-bgp-mibv4-06.txt) awaits experience report to IESG to be forward to Proposed. The document IDRP for IPv[46] (draft-ietf-idr-idrp-v4v6-02.txt) will be merged with the IDRP specification. The documents related to Destination Preference Attribute (DPA)
(draft-ietf-idr-bgp-dpa-05.txt
draft-ietf-idr-dpa-application-02.txt
draft-ietf-idr-symm-multi-prov-02.txt)
were discussed. draft-ietf-idr-bgp-dpa-05 will be revised to reflect working group consensus, and will be submitted for proposed standard. the other two documetns will be submitted for informational status. The BGP community specification (draft-chandra-bgp-communities-00.txt) has been release for over a year. It has been implemented by Bay networks and Cisco. It is suggested that Yakov make the last call, and move it to proposed standard. 

BGP Confederations document (draft-traina-bgp-confed-00.txt) is moved to experimental. Route Reflection specification (draft-bates-route-reflect-00.txt) recommends that this move forward to experimental.

Routing Over Large Clouds Working Group - 
Andrew Malis, Chair

The rolc WG met in two sessions at this IETF. There were 142 attendees.

First session:
The WG received an ATM Forum MPOA report. The 08-beta version of the NHRP specification was discussed, and some open issues were resolved. The chair announced that the ipatm and rolc working groups will produce one common multiple server synchronization mechanism for use by NHRP, ATMARP, and MARS, specified in a stand-alone document. Keith McCloghrie presented the ATM Forum's LAN Emulation Server Synchronization protocol. Jim Luciani presented his Server Cache Synchronization Protocol (SCSP). He and Joel Halpern are collaborating to merge SCSP with the synchronization protocol in the ipatm Classic2 document. 

Second session:
Maria Greene and Jim Luciani reported that they have received from the MIB from Avri Doria, the previous editor. It is based in part on the Classical IP MIB. Derya Cansever reported on the status of the NHRP Protocol Applicability Statement. Yakov Rekhter reported on the status of his NHRP for Destinations off the NBMA Network draft. Yakov presented a mechanism, Sparse Mode PIM over ATM, to eliminate extra layer three hops across an ATM network for multicast traffic. Masataka Ohta discussed the inscalability of multicast over large clouds. Rob Coltun presented a mechanism for using information in OSPF to eliminate some hops for NHRP requests. Following Rob's talk, the WG adjourned.

Nimrod Working Group -
Noel Chiappa, Isidro Castineyra and Dave Bridgham chairs The Nimrod working group met on Wednesday March 6 from 7pm to 9pm. The bulk of the time was spent going over the current state of the architecture and protocols. There was also a report on the state of the implementation at BBN.

Inter-Domain Multicast Routing -
Anthony Ballardie and Bill Fenner chairs IDMR met in two sessions. The first session had Tom Pusateri talking about the DVMRP spec, in which he specified DVMRP version 3, which mrouted uses, except he removed all of the mistakes that the mrouted implementors made from being part of the protocol. Bill Fenner talked about IGMPv2, the most significant change being the requirement of the IP Router Alert option. Deborah Estrin talked about PIM and recent changes, mostly simplifications in the elimination of RP timers and the introduction of an algorithmic mapping from group address to RP. Dave Thaler talked about the characteristics that such a mapping should have and presented the current implementation. Deborah then presented the PIM<>DVMRP interop architecture. The second session had Tony talking about CBT updates and CBT interop, which elects a single designated border router to inject traffic into and out of a CBT domain. The transit issue is not addressed. Scott Reeve presented the CBT MIB, which several people thought had several items duplicated from other MIB's. Bill Fenner presented new features in DVMRPv4, including source-less prunes, source-specific prunes, prefixes in routing updates and a prune-is- expiring message. Yuan-Chi Chang presented a new proposal called "Core-Group Based Trees", which dynamically locates cores based upon group membership, and in which the top-level cores unicast traffic to all other cores. Shridhar Shukla presented an architecture for hierarchy that groups nodes together and builds multicast trees from the nearest border router to the next level, and requires registration of multicast groups in databases at each level.