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Re: [6lo] Generation of IPv6 IIDs

Samita Chakrabarti <samita.chakrabarti@ericsson.com> Thu, 24 July 2014 05:32 UTC

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From: Samita Chakrabarti <samita.chakrabarti@ericsson.com>
To: "Jonathan Hui (johui)" <johui@cisco.com>, Erik Nordmark <nordmark@acm.org>
Thread-Topic: [6lo] Generation of IPv6 IIDs
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Date: Thu, 24 Jul 2014 05:32:34 +0000
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Cc: "6lo-chairs@tools.ietf.org" <6lo-chairs@tools.ietf.org>, "6man Chairs (6man-chairs@tools.ietf.org)" <6man-chairs@tools.ietf.org>, Erik Nordmark <nordmark@cisco.com>, Dave Thaler <dthaler@microsoft.com>, "6lo@ietf.org" <6lo@ietf.org>, Fernando Gont <fgont@si6networks.com>, "draft-ietf-6man-default-iids@tools.ietf.org" <draft-ietf-6man-default-iids@tools.ietf.org>
Subject: Re: [6lo] Generation of IPv6 IIDs
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Hi Jonathan/Erik:

That's a good point. 

Jonathan: could we then request you to provide a text that can be added to default-iid document for 6lo related documents ?

Thanks,
-Samita


> 
> I think we should assume that those documents will be updated in the future to provide the option to work with other IIDs even if that comes with lower efficiency.

Note that RFC 6282 already provides the option:
- If the IID can be derived from MAC address, great.
- If not, things will still work just with reduced efficiency.

Section 10 of RFC 4944 also provides the same option, but has since been replaced by the encoding specified in RFC 6282.

Also note that 802.15.4 interfaces have both a stable MAC address (EUI-64) and a locally-significant, dynamic MAC address (Short Address).  Many of the arguments against MAC-address-based IIDs may not apply when using Short Addresses.

-
Jonathan Hui

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