[Samba] samba client dropping from domain

[Shawn S]

I have two linux web servers on a windows domain. On initial setup and
connect, they work just fine and respond to http requests as I expect (
http://hostname).

But after a few days, it appears the windows DC is doing something,
changing IP maybe, and they drop from the domain. I can get it back onto
the network, but only if the administrator removes the existing DNS entry
for my machine on the DC.

How do I handle this on the Samba side?

Thanks,

-- 
Shawn Sullivan
Shelbydz at gmail.com