> I believe you can make your set of rules simpler if you introduce
> a new lifetime (or condition if one needs something smarter than
> a delay). I'll call it "regen lifetime" and when the regen lifetime
> of an anonymous address expires then a new address is created, checked
> by DAD then is used as the anonymous address, the old one is
> deprecated.
> With this we can keep the current deprecated/invalid mechanism on RA
> receptions (this is complex enough with the two hour rule and all the
> side effects we can get from short lifetimes (mis)used for mobility).
I don't think this works. Suppose you have an existing anonymous address,
say with a zero preferred lifetime and a 3 hour valid lifetime. (And you
also have other anonymous addresses and a public address with the same
prefix.) Now you receive an RA with a matching prefix information option.
The lifetimes in the option are 1 day preferred and 1 week valid. You don't
want to change the lifetimes of the existing anonymous address.
Hence, the rules for processing lifetimes in prefix information options do
need a special case for anonymous addresses.
Rich
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