[ipv6hackers] DAD and Link-Local

Fernando Gont fgont at si6networks.com
Sat Jul 14 13:57:27 CEST 2012

On 07/14/2012 09:29 AM, Owen DeLong wrote:
> I believe you are correct, but, it is not the first RFC to be commonly broken.

Just to add to this discussion:

IIRC, some implementations kind of disable IPv6 configuration if DAD
fails for *link-local*, but then ignore DAD if DAD fails for
non-link-local addresses.

My personal take is that DAD should be performed for all addresses (no
matter how they are configured) -- duplicate detection once the address
has already been configured could be (safely(?)) ignored.

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

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