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- Editor's note: These minutes have not been edited.
-
- Date: Tue, 2 Aug 1994 23:50:42 -0700
- From: Tony Li <tli@cisco.com>
- Subject: SDR WG minutes
-
-
- The SDRP forwarding protocol and prototype has been stable for some
- time. There are two issues now facing the working group: 1. mechanisms
- for constructing source routes to make the forwarding code useful, 2.
- working with IPng folks to support SDR functionality. Looking a bit
- farther ahead, we should be addressing the SDR routing requirements
- raised by integrated-services/RSVP traffic. This meeting was composed
- of two parts: a discussion of RIB query support in IDRP to support
- SDR route construction, and a joint meeting with the IPng working
- group to present a strawman proposal on SDR support in IPng.
-
- As introduction to the IDRP support discussion, Deborah Estrin
- reviewed the two basic route construction approaches under
- development: RIB query and Path explorer. Activity has been
- focused mainly at USC/ISI and Merit.
-
- Sue Hares presented some new functionality to enable route computation
- by obtaining information through IDRP. The mechanisms permit a node
- to query an IDRP speaker via a IDRP Rib Refresh message, with the
- response being a series of Update messages. The facility allows the
- requestor to get a single snapshot of the IDRP speaker's database, or
- to get a continuous series updates, effectively forming a one-way IDRP
- peering. The requestor can specify particular attributes in the
- information request, including QOS and NLRI criteria.
-
- The response can contain information from the IDRP speaker's Loc_rib
- or Adj_Rib, so that the requestor also learns some information about
- all of the IDRP speaker's neighbors. The end of the initial response
- is also clearly delimited by a message so that the requestor can begin
- computation.
-
- Estrin briefly addressed two related issues: one was the role of the
- Route Server/Routing Arbiter in route construction and aquisition, and
- the second was the proposed use of SDR routes to guide multicast
- (e.g., PIM) join messages along alternate routes to join the
- distribution tree, when the generic unicast route is inadequate.
-
- The working group then went to a joint session with the IPv6
- working group, where SDR for IPv6 was discussed. Peter Ford
- presented a basic proposal in which SDR would become an optional
- header in an IPv6 packet. There was some inconclusive discussion
- about the utility of strict source routing and for the requirement
- of policy routing in general. After this discussion, it was
- decided that SDR for IPv6 is indeed of interest and that this work
- should continue in the SDR working group.
-