2 NICs and 1 network

[Petr Janda]

Hi there,
Im trying to run an authoritative dns server on 1 NIC and dns 
cache/recursive resolver on another NIC. Therefore 2 IPs on the same net 
and connected to the same switch. Therefore theres a problem. What 
options do i have in regards to resolving the issue without putting them 
on different networks? Will having the 2 IP's on the same NIC fix this 
problem or not?

Thanks,
Petr