I-D Action: draft-ietf-manet-nhdp-optimization-04.txt
internet-drafts@ietf.org Fri, 23 January 2015 13:45 UTC
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Subject: I-D Action: draft-ietf-manet-nhdp-optimization-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Mobile Ad-hoc Networks Working Group of the IETF. Title : An Optimization for the MANET Neighborhood Discovery Protocol (NHDP) Authors : Christopher Dearlove Thomas Heide Clausen Filename : draft-ietf-manet-nhdp-optimization-04.txt Pages : 10 Date : 2015-01-23 Abstract: The link quality mechanism of the 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 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 RFC6130 "Mobile Ad Hoc Network (MANET) Neighborhood Discovery Protocol (NHDP)", and RFC7181 "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". The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-manet-nhdp-optimization/ There's also a htmlized version available at: http://tools.ietf.org/html/draft-ietf-manet-nhdp-optimization-04 A diff from the previous version is available at: http://www.ietf.org/rfcdiff?url2=draft-ietf-manet-nhdp-optimization-04 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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