Re: 64bit MAC addresses and SLAAC

[Philip Homburg <[e-mail]>]

> > That is the nature of SLAAC. You need an IID that has a very high probabily
>  of
> > being unique. So you need enough random bits.
> >
> Is this really, deep down, the nature of SLAAC? Or the consequence
> of not having a very fast and reliable DAD? Arguably one could
> autoconfig even IPv4 within a /24 if there's a broker that serializes
> the requests and rejects the duplicates.  

We have that broker, it is called DHCPv6.

Absent such a centralized service, a host would have a hard time proving that
a address unique, for example, there might be a network split.

Current DAD is certainly not good enough if there are regular address
collisions and I doubt anybody is willing to come up with a better DAD
just to have nicer looking addresses in SLAAC.