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Re: last call comments for draft-ietf-6man-stable-privacy-addresses-06

2013-04-26 04:11:52
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