> Further to that, ifindexes of tunnels and PPP sessions can change dynamically > as the bearer connection goes up and down, even if the interface has the same > name and authenticated identity. That raises the interesting question of > whether even the interface name is stable, as on many systems it is pure > chance if the same name-identity mapping repeats itself. > > If you want a stable address, you want to use something that actually has the > exact stability properties you require, and interface indexes and names are > seldom what you actually need.
could we simplify the hash to only include the prefix, cookie and DAD counter: RID = F(Prefix, secret_key, DAD_Counter) an implementation that wants a stable address for cases where DAD_Counter > 0, must keep state. e.g. maintain a table of prefix, dad_counter or list of previous addresses. cheers, Ole
