Wrong IP Lookup

[Norman Zhang]

>>I have BIND setup to take DDNS from a multihomed box. DDNS are enabled
>>on both NICs. For example,
>>
>>dc1.mydomain.com 192.168.11.21 192.168.22.21
>>
>>However, the wrong IP may sometimes be resolved for the wrong subnet. Is
>>there a way I can restrict hosts in 192.168.22.0/24 subnet to resolve to
>>192.168.22.21 only? And likewise for subnet 192.168.11.0/24?
> 
> Are both nics connected to the same hub/switch?

Thank you for your help. No they are not connected to the same 
hub/switch. The hub and switches are on complete different subnets.

> If so, then you're playing an ARP roulette which is why sometimes it's ok 
> sometimes it's bust. That is when some pc asks "Who has 192.168.22.21?" The 
> kernel on the box would be confused and would make both nics answer it, 
> whichever comes first.

If I do nslookup, I sometimes see,

dc1.mydomain.com
192.168.11.21 192.168.22.21

dc1.mydomain.com
192.168.22.21 192.168.11.21

Does this matter? Someone off-list told me views could help. Do you 
think that would work? I'll go investigate further.

Regards,
Norman