DHCP: two boxes grabbing the same IP address?

[Masao Kitamura]

I've got DHCPD running on one box, and TinyDNS running on another.

When a client requests an IP from DHCPD, the DHCPD server has a
MAC->Name mapping, which then queries TinyDNS which has the Name->IP
mapping.

This has been working for 20+ clients for the past few years, but now
I'm having a conflict where 2 machines are constantly getting the same
IP (where using that IP can be unpredictable as to which box it refers
to).

How do I fix this?  Is there way to clear either the server or clients?

i've tried:

- dhclient -r, then dhclient
- clearing /var/lib/dhcp3/dhcpd.leases on the DHCPD server

anything else I could try?

Thanks,

Masao