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Re: [Roll] reducing DAO size by compressing targets

Carsten Bormann <cabo@tzi.org> Fri, 13 November 2015 09:05 UTC

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Date: Fri, 13 Nov 2015 10:05:02 +0100
From: Carsten Bormann <cabo@tzi.org>
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To: Routing Over Low power and Lossy networks <roll@ietf.org>
References: <DB5PR01MB10807DAF503BBFF45787599C80420@DB5PR01MB1080.eurprd01.prod.exchangelabs.com> <6d21d0f86ab14ae7a99ff9fe6873b1fd@XCH-RCD-001.cisco.com> <C885EE62-D889-4229-9CCB-B3CB540F5692@sics.se> <560AFDBB.8050505@gmail.com> <8f1d44568afa4348a05169bedc3c3020@XCH-RCD-001.cisco.com> <13673.1447057653@sandelman.ca> <7dd73a8a9e7741e2acedec67dc56ae2b@XCH-RCD-001.cisco.com> <65CF4B05-02D0-4BB0-A48E-1B6418DBCC52@sics.se> <24860.1447344255@sandelman.ca> <1214FA71-592F-45FB-AB16-8A7D0921800C@sics.se> <982B626E107E334DBE601D979F31785C5C505477@szxeml558-mbs.china.huawei.com>
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Subject: Re: [Roll] reducing DAO size by compressing targets
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Rahul Arvind Jadhav (Rahul Arvind Jadhav, 2012 Labs) wrote:
> Hello All,
> 
> Currently "RPL Target" option that is carried by DAO keeps the target uncompressed even if the 6Lowpan context information might be available.
> Can we have an option for "RPL Compressed Target" which uses Context ID to compress the ipv6 addr? Targets could be prefixes, partial prefixes or full ipv6 addresses which could be compressed. 

Bad layering.
The context information may not be available at the place where the RPL
info is processed.

Have you tried out whether RFC 7400 helps?
(I removed context-based compression from GHC since nobody seemed to
need it; maybe that was wrong.)

Grüße, Carsten

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