At wit's end....(can't find dhcp leases)

[Brian Johnson]

Hello --

I hope I'm not duplicating a question that's already been asked, but
it's difficult to search for the answer without being too general or
too specific.

My problem is this, and it's driving me crazy. Occasionally, we have
reason to go back and identify the mac address of a particular ip
address at a specific time. The obvious place to find this information
is in the leases file. However, it seems more and more often, we're
unable to find a lease for a particular ip address at the given time.
So, my question is twofold -- is anyone else seeing this particular
issue? And if so, are there any ideas why we might be seeing it? I
have some theories, but can't find anything on the internet to support
them.

Thank you for your help!

Brian Johnson