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Re: [v6ops] "The Internet is for End Users" (Re: I-D Action: draft-ietf-v6ops-unique-ipv6-prefix-per-host-07.txt)

Libor Polčák <ipolcak@fit.vutbr.cz> Mon, 28 August 2017 08:09 UTC

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To: Tim Chown <Tim.Chown@jisc.ac.uk>, Timothy Winters <twinters@iol.unh.edu>
Cc: Simon Hobson <linux@thehobsons.co.uk>, v6ops list <v6ops@ietf.org>
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From: Libor Polčák <ipolcak@fit.vutbr.cz>
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Date: Mon, 28 Aug 2017 10:09:15 +0200
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Subject: Re: [v6ops] "The Internet is for End Users" (Re: I-D Action: draft-ietf-v6ops-unique-ipv6-prefix-per-host-07.txt)
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Tim Chown napsal(a):
> Hi,
> 
>> On 17 Aug 2017, at 11:47, Timothy Winters <twinters@iol.unh.edu> wrote:
>>
>> Most operating systems give up if they fail DAD.
> 
> For SLAAC, RFC7127 includes a DAD counter in the IID generation algorithm, and specifies how to use that in https://tools.ietf.org/html/rfc7217#section-6, but has anyone tested whether existing implementations are doing that?

Hello,

We tested the number of retries performed by different OS for RFC4941 addresses several years ago http://6lab.cz/behaviour-of-various-operating-systems-during-slaac-dad-and-nd/. See the last column in the table.

In summary, Linux, Solaris, and Windows tried different RFC4941 addresses. FreeBSD, OpenBSD, MAC OS X tried only a single RFC4941 address.

Regards,

Libor

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