Re: [DNA-BOF] Comments on draft-kumar-dna-reqmnt-ipv4-00.txt

[Bernard Aboba <aboba@internaut.com>]

> Couldn't a DHCP server act upon a "link-layer trigger" and release the
> resources? Unless this is prohibited in the DHCP specification, I suspect
> this can very well happen.

I'd suggest that attempting to build a DHCP Server that kept track of
"link down" events everywhere on the network and revoked resources as a
result would be a very bad idea.

The result would be a DHCP server that was constantly revoking leases
without client knowledge.  "Link down" events are very common,
and most of the time are quite harmless so the best thing to do is to
ignore them most of the time, not "act on them immediately" as was
suggested in this requirements document.  Since clients routinely ignore
these events (to their credit), if the server were to attempt to take them
into account the client and server would be out of sync much of the time.

Overall, there is a very good reason why the idea of remoting "link down"
triggers has not progressed.