In your previous mail you wrote:
I think DAD should be disableable for default for:
- addresses generated randomly
=> I *strongly* disagree: even if the probability is small it is not zero.
- addresses that are generated from e.g. EUI64 (this might be more prone
to errors, e.g. manufacturing or "stupid" multi-port NIC's where every
port has the same MAC address)
=> I agree: if two boxes have the same hardware number the address
collision is no more than a detail.
Most definitely not:
- manually configured addresses
=> agree
Because DAD is not a perfect (or even nearly so) solution anyway.
=> DAD is not perfect but only the network manager should take the
decision to forget DAD in such or such situations. Of course this
implies the "DAD avoidance" is negociated by the link-layer before
(so PPP again is a good candidate for optional DAD).
Regards
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