Both my DHCP servers are receiving this message every 4 seconds:
<DHCPINFORM> packet received from client <>, IP Address <0.0.0.0>.

Our two DHCP services are running on NetWare 6.5 SP5 and NetWare 6.5 SP6.
DHCPSRVR.NLM versions are 3.13 and 3.14, respectively.

DHCP services are still running fine with plenty of IP addresses still
available.

We can see these messages because DHCPSRVR is started using switch:
DHCPSRVR.NLM -d1

Any idea what this means?
Any idea how to fix it?

Thanks,
Marc