A new Request for Comments is now available in online RFC libraries.
RFC 7466
Title: An Optimization for the Mobile
Ad Hoc Network (MANET) Neighborhood Discovery
Protocol (NHDP)
Author: C. Dearlove, T. Clausen
Status: Standards Track
Stream: IETF
Date: March 2015
Mailbox: chris.dearlove@baesystems.com,
T.Clausen@computer.org
Pages: 9
Characters: 17949
Updates: RFC 6130, RFC 7181
I-D Tag: draft-ietf-manet-nhdp-optimization-04.txt
URL: https://www.rfc-editor.org/info/rfc7466
The link quality mechanism of the Mobile Ad Hoc Network (MANET)
Neighborhood Discovery Protocol (NHDP) enables "ignoring" some 1-hop
neighbors if the measured link quality from that 1-hop neighbor is
below an acceptable threshold while still retaining the corresponding
link information as acquired from the HELLO message exchange. This
allows immediate reinstatement of the 1-hop neighbor if the link
quality later improves sufficiently.
NHDP also collects information about symmetric 2-hop neighbors.
However, it specifies that if a link from a symmetric 1-hop neighbor
ceases being symmetric, including while "ignored" (as described
above), then corresponding symmetric 2-hop neighbors are removed.
This may lead to symmetric 2-hop neighborhood information being
permanently removed (until further HELLO messages are received) if
the link quality of a symmetric 1-hop neighbor drops below the
acceptable threshold, even if only for a moment.
This specification updates RFC 6130 "Mobile Ad Hoc Network (MANET)
Neighborhood Discovery Protocol (NHDP)" and RFC 7181 "The Optimized
Link State Routing Protocol Version 2 (OLSRv2)" to permit, as an
option, retaining, but ignoring, symmetric 2-hop information when the
link quality from the corresponding 1-hop neighbor drops below the
acceptable threshold. This allows immediate reinstatement of the
symmetric 2-hop neighbor if the link quality later improves
sufficiently, thus making the symmetric 2-hop neighborhood more
"robust".
This document is a product of the Mobile Ad-hoc Networks Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
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