MANET Extension of OSPF using CDS Flooding
draft-ogier-manet-ospf-extension-10
| Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
|
|
|---|---|---|---|
| Authors | Richard Ogier , Phil Spagnolo | ||
| Last updated | 2007-11-18 | ||
| RFC stream | (None) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
This document specifies an extension of OSPF for IPv6 to support mobile ad hoc networks (MANETs). The extension, called OSPF-MDR, is designed as a new OSPF interface type for MANETs. OSPF-MDR is based on the selection of a subset of MANET routers, consisting of MANET Designated Routers (MDRs) and Backup MDRs. The MDRs form a connected dominating set (CDS), and the MDRs and Backup MDRs together form a biconnected CDS for robustness. This CDS is exploited in two ways. First, to reduce flooding overhead, an optimized flooding procedure is used in which only (Backup) MDRs flood new LSAs back out the receiving interface; reliable flooding is ensured by retransmitting LSAs along adjacencies. Second, adjacencies are formed only between (Backup) MDRs and a subset of their neighbors, allowing for much better scaling in dense networks. The CDS is constructed using 2-hop neighbor information provided in a Hello protocol extension. The Hello protocol is further optimized by allowing differential Hellos that report only changes in neighbor states. Options are specified for originating router-LSAs that provide full or partial topology information, allowing overhead to be reduced by advertising less topology information.
Authors
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