Re: [2461bis issue 250] Reception of prefix option with prefix length > 64

Markku Savela <msa@burp.tkv.asdf.org> Tue, 10 February 2004 12:43 UTC

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Date: Tue, 10 Feb 2004 14:38:28 +0200
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From: Markku Savela <msa@burp.tkv.asdf.org>
To: H.Soliman@flarion.com
CC: ipv6@ietf.org
In-reply-to: <9E3BA3946476AD4EB94672712B12A85F042123@ftmail.lab.flarion.com> (message from Soliman Hesham on Tue, 10 Feb 2004 07:26:05 -0500)
Subject: Re: [2461bis issue 250] Reception of prefix option with prefix length > 64
References: <9E3BA3946476AD4EB94672712B12A85F042123@ftmail.lab.flarion.com>
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> From: Soliman Hesham <H.Soliman@flarion.com>

> What should a node do upon reception of a prefix option with the prefix
> length set to a value >64?
...
> 4. Leave this field as is and design a mechanism that
> allows the host to form an address based on the 
> length of the interface identifier (i.e. 128 - prefixlen). 

Well, just a datapoint: I do basicly 4. I have 128 bits or less of
interface id. (128 - prefixlen) bits from the least significant part
of the interface id is copied into real address (and rest is ignored).

I could as well have prefixlen < 64. Makes no difference.

However, I would really prefer that all prefixes on the link do use
the same prefixlen :-)



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