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Re: DAD question

Bob Hinden <bob.hinden@gmail.com> Sat, 11 August 2012 22:18 UTC

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Subject: Re: DAD question
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From: Bob Hinden <bob.hinden@gmail.com>
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Date: Sat, 11 Aug 2012 15:18:01 -0700
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References: <36AA0AF8-95FD-4751-AE2E-A7A3D07038EB@cisco.com> <409F28A1-7974-4524-893D-CEF349A96657@employees.org> <5FAE0128-DDE7-45C4-8632-F56EAA1BE362@gmail.com> <50269379.3010100@si6networks.com>
To: Fernando Gont <fgont@si6networks.com>
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Cc: "ipv6@ietf.org 6man" <ipv6@ietf.org>, Bob Hinden <bob.hinden@gmail.com>, "Fred Baker (fred)" <fred@cisco.com>
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On Aug 11, 2012, at 10:16 AM, Fernando Gont wrote:

> Hi, Bob,
> 
> On 08/11/2012 12:36 PM, Bob Hinden wrote:
>>>> There would appear to be two options: 
>>>> (1) "ah, OK, I guess I didn't really want to talk today"
>>>> (2) Following RFC 4941, guess again until one creates a unique address
>>>> 
>>>> Is it fair to assume that implementations do DAD and follow (2)?
>>> 
>>> implementations I'm familiar with do 1.
>>> it may be a fair assumption that if an address based on the MAC address is duplicate, the MAC address itself is a duplicate.
>> 
>> True, but the odds of this happening are very low.  I wonder if we have any data on DAD detecting duplicate addresses and their cause.
> 
> Virtual machines?

Good point.  

Thanks,
Bob


> 
> Cheers,
> -- 
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
> 
> 
>

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