MOSPF Prunes
draft-ietf-mospf-prunes-00
| Document | Type | Expired Internet-Draft (mospf WG) | |
|---|---|---|---|
| Author | John Moy | ||
| Last updated | 1998-12-23 | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | (None) | ||
| Formats |
Expired & archived
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| Stream | WG state | WG Document | |
| Document shepherd | (None) | ||
| IESG | IESG state | Expired | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
https://www.ietf.org/archive/id/draft-ietf-mospf-prunes-00.txt
Abstract
MOSPF is a link-state multicast routing protocol, based on OSPF. Inside a single OSPF area, the delivery of multicast datagrams is restricted to group members only, by propagating the location of group members through group-membership-LSAs. However, group membership is not propagated across area and/or AS boundaries, relying instead on so-called wild-card multicast receivers. This means that in some cases multicast datagrams are transmitted further than necessary, wasting link and processor resources in the process. This document defines a way to prune these excess branches off the MOSPF delivery tree, using a new Prune-LSA. In concept these are similar to the prunes employed by the DVMRP protocol. However, to reuse the reliability mechanisms present in the base OSPF protocol, MOSPF prunes are implemented as local-scope Opaque-LSAs. As a result, inter-area and inter-AS multicast datagrams are forwarded by MOSPF using the broadcast-and-prune strategy employed by DVMRP.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)