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-
- Routing Area
-
- Director(s):
-
-
- o Bob Hinden: hinden@eng.sun.com
-
-
- Area Summary reported by Bob Hinden/Sun
-
- Inter-Domain Multicast Routing BOF (IDMR)
-
- The entire IDMR session was spent in a discussion of the CBT protocol.
- Particular attention was given to the changes in the Protocol since the
- November IETF.
-
-
- o MulticastOScopenControle possible solution to multicast scope control was *
- *presented,
- based on having a separate group per level of scope required. This
- resulted in a considerable debate as to how multicast scoping
- should be defined and the requirements of users it should be able
- to satisfy. The solution presented was deemed unsuitable, and it
- was agreed to continue the discussion on the IDMR mailing list.
- The conclusion was that the Group should work towards a concise
- definition of multicast scope control.
-
- o MulticastTDatahPacketsere was a brief discussion on the issue of multicast*
- * data packets
- carrying the group-id as an IP option. The conclusion however, was
- that there was no more suitable alternative. It was also decided
- that non-primary cores should be less stringent in accepting
- join-requests. Further, an additional error detection mechanism is
- required by routers to distinguish on-tree packets arriving via a
- child as link-level unicast.
-
-
- Paul Tsuchiya concluded the session with a description of how CBT will
- run over Pip.
-
- Virtual Circuit Routing BOF (VCROUT)
-
- The VCROUT BOF meet on Monday and Wednesday. On Monday, Rob Coltun led
- a discussion on routing criteria for a seamless VC internet. Much of
- the discussion centered on address as well as terminology. Drew Perkins
- presented Fore Systems' routing strategy.
-
- On Wednesday, Marco Sosa led a discussion on the scope of the Working
- Group's direction and goals. The Group agreed that they would include
- both intra-domain and inter-domain routing within their scope, but
- initially focus on intra-domain routing. The protocol for topology
- notifications and methods for aggregating topology information to
- provide possible routes to a call set-up will be addressed. Rob then
-
- 1
-
-
-
-
-
- provided an overview of the proposal drafted by Marco and himself.
-
- Allison Mankin gave a presentation on congestion control implementation,
- signaling, and its relationship to QOS and routing. Finally, some
- modification to the draft proposal were suggested and discussed.
-
- The Group plans to meet in Amsterdam as a working group.
-
- Border Gateway Protocol Working Group (BGP)
-
- The BGP Working Group met jointly with the IPIDRP Working Group. Refer
- to the IPIDRP section of this report for a summary of their meeting.
-
- Inter-Domain Policy Routing Working Group (IDPR)
-
- There are two new Internet-Drafts, one by Rob Austein on DNS extensions
- for IDPR and one by Woody Woodburn which is the latest version of the
- IDPR MIB. The Group encourages people to read these Drafts and send
- comments to the IDPR mailing list.
-
- The Internet pilot demonstration of IDPR is scheduled to begin next week
- and will run for approximately one month. The results of the pilot, as
- well as a description of the installation, will be published in an
- Informational RFC at the conclusion of that period.
-
- Discussion topics included the implications of domain hierarchies
- (``superdomains'' in the architecture document terminology) and resource
- allocation in the context of IDPR.
-
- Super domain discussion included domain address representation; policies
- of super domains; and obtaining more detailed information about the
- contents of a super domain through mechanisms such as active
- distribution by constituent domains and queries from external domains.
-
- Resource allocation discussion included a description of the ``fair
- share'' resource allocation mechanism as well as a general discussion of
- how to integrate resource allocation and policy routing. Topics
- included route generation heuristics to improve the probability of
- generating routes that supply the necessary resources, as well as
- passing flow control information back to the beginning of a path.
-
- IP Routing for Wireless/Mobile Hosts Working Group (MOBILEIP)
-
- The MOBILEIP Working Group met twice during the Columbus IETF. There
- were six formal presentations on different approaches to mobile IP
- followed by a discussion of how to actually make progress.
-
- After listening to 6 talks on the status of old proposals and on new
- proposals, the Working Group decomposed the problem into 5 pieces (with
- an additional 5 ``cross matrix'' pieces). Each of the pieces was
- assigned to a Working Group member for them to edit a document
- documenting a solution to that part of the puzzle.
-
- 2
-
-
-
-
-
- ISIS for IP Internets Working Group (ISIS)
-
- The ISIS Working Group met for one session. The Group agreed to try and
- advance the Proposed Standard (RFC1195) and the MIB up the standard
- track to Draft and Proposed status respectively at the next IETF
- meeting.
-
- The Group also discussed a number of new enhancements and extensions to
- the protocol. These include:
-
-
- o Support for CLNP Multicast (maybe define something new - not what
- ANSI/ISO are defining).
-
- o Adding a designated router ``feature'' to the Protocol
- specification.
-
- o Defining how to support multiple level 1 Areas in one router.
-
- o Defining multiple levels of hierarchy.
-
- o Adding Appletalk and IPX integration into the Protocol.
-
- o Increasing the LSP number limit to 64K bytes.
-
- o Increasing the metric range to 16 bit internal and 32 bit external.
-
- o Methods to run over non-broadcast multi-access networks (e.g.
- SMDS, ATM, X.25, etc.).
-
-
- Multicast Extensions to OSPF Working Group (MOSPF)
-
- The MOSPF Working Group met for one session. John Moy discussed the
- MOSPF Analysis and Experience Draft that he prepared to accompany the
- MOSPF Protocol Specification, as required for all routing protocols
- submitted to the standards track. Christian Huitema raised a concern
- about the scaling properties of MOSPF, and suggested the use of Reverse
- Path Forwarding with on-demand pruning as a backup mechanism for cases
- of router memory or processor exhaustion. In the discussion that
- ensued, it was pointed out that, for the size of domains for which MOSPF
- is intended, the overhead of MOSPF is well within the capabilities of
- contemporary routers, given certain assumptions of worse-case behavior
- of multicast group members and senders. However, it was observed that a
- good model for multicast workload does not yet exist, thus making it
- difficult to judge the value of Christian's proposed extensions. The
- Group decided to submit the MOSPF draft, as is, to the IESG for
- publication as a Proposed Standard.
-
- Open Shortest Path First IGP Working Group (OSPF)
-
-
- 3
-
-
-
-
-
- After reviewing the four OSPF documents that were pending, the Group
- decided to:
-
-
- o Submit the updated OSPF V2 spec for RFC publication, obsoleting
- RFC1247 (some urgency exists, since the Group wants CIDR changes
- communicated to the larger community);
-
- o Submit the OSPF Trap MIB as a Proposed Standard;
-
- o Publish a document describing how to implement OSPF on Frame Relay
- as an Informational RFC; and
-
- o Delay the OSPF NSSA area document for small modifications.
-
-
- The Group spent the majority of the remaining time discussing a proposal
- for carrying BGP path information in OSPF (to eliminate Internal BGP).
- At the end of the meeting, the Group outlined a document describing RIP
- to OSPF transition strategies.
-
- OSI IDRP for IP over IP Working Group (IPIDRP)
-
- The IPIDRP and the BGP Working Groups met jointly with over 80 people in
- attendance for the two sessions. Issues discussed during the sessions
- include the following:
-
-
- o PIP's requirements for BGP/IDRP.
- o Status of BGP-4 documents.
- o Size of Local Preference in BGP-4.
- o Size of MULTI_EXIT_DISC in BGP-4.
- o IDRP for IP documents.
-
- - IDRP for IP document.
- - IDRP for IP family document.
- - IDRP MIB.
-
- o BGP-4 Transport Session Statistics and Routing Statistics.
- o IDRP/BGP-4 to OSPF.
- o OSPF Paper.
-
-
- It was recommended that IDRP for IP be progressed to Proposed Standard
- as soon as one implementation was completed.
-
- The BGP-4 has one implementation and was recommended to be progressed to
- Proposed Standard.
-
- Source Demand Routing Working Group (SDR)
-
- A brief tutorial on SDRP was given. Changes to the packet format and
-
- 4
-
-
-
-
-
- forwarding specification since the last IETF were reviewed and approved
- without comment. Prototype development on this portion of the protocol
- will continue. Preliminary discussions were held on the contents of the
- usage document and on a proposed ``futures'' document. A list of other
- tasks were enumerated and volunteers were drafted.
-
-
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- 5
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