I have a quick question about RFC2462 (stateless address
autoconfiguration). I know we've had a similar discussion before, but
please let me repeat it...
The RFC defines the notion of "StoredLifetime" as follows:
e) If the advertised prefix matches the prefix of an autoconfigured
address (i.e., one obtained via stateless or stateful address
autoconfiguration) in the list of addresses associated with the
interface, the specific action to perform depends on the Valid
Lifetime in the received advertisement and the Lifetime
associated with the previously autoconfigured address (which we
call StoredLifetime in the discussion that follows):
In my understanding, StoredLifetime is the "remaining" lifetime to
expiration at the time when the new Router Advertisement is received.
So, for example, if we first received a prefix with the valid lifetime
being 7200 seconds, and then received a next advertisement 1800
seconds later, the StoredLifetime corresponding to the address from
the prefix should be 5400 (= 7200 - 1800) seconds.
I believe this interpretation is correct, and I've implemented RFC
2462 in this manner. However, a user of our implementation said it
was *not* what RFC2462 says, because
> all "Lifetime associated with the address" pseudo-definitions are
> very, very careful not to say the Lifetime is actually being
> decremented.
(cited the user's message)
But is there any other interpretation of StoredLifetime? I'm now
confused, so I'd like to hear authors' intention.
Thanks,
JINMEI, Tatuya
Communication Platform Lab.
Corporate R&D Center, Toshiba Corp.
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