Hi,
Speaking of RFC 2461(bis), some time ago I noticed the following
behaviour with a popular router implementation (a support case is open
on this): for forwarded packets, it takes up to 24 hours (in recent
software versions, up to 20 minutes) for the hardware forwarding to
notice that an IP address moved from one link-layer address to another
on the same link if unsolicited NAs (section 7.2.6, only an
optimization; few host implementations seem to send these) are not
sent by the hosts.
My reading of the spec is that this is not compliant with RFC2461,
where protocol constants are REACHABLE_TIME (30s) and
DELAY_FIRST_PROBE_TIME (5s) -- unreachability detection could take
about 35 times longer than the spec.
However, the spec doesn't say whether the defined protocol constants
are normative, and this could be explicitly stated if that's deemed a
necessary addition.
Any thoughts?
--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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