Look for some on-line IP calculators. 

You need a mask split ( such as "/28" instead of "/24") and then one NIC 
gets 0-100 and the other gets 101-200.

John


Richard StClair wrote:
> Hi,
>
> Soekris 4501 with MW 1.3b2.
>
> WAN eth0    192.168.1.0/24 with an IP of 192.168.1.200
>
> LAN eth1    192.168.2.0/24 with an IP of 192.168.2.200   
> Works Great.
>
> Shouldn't I be able to add:
>
> opt1     eth2    192.168.2.201/24 in same subnet as the LAN on eth1?
>
> I've tried it and can't get anything to route through it.
>
> I've done the firewall rules for opt1.
>
> I think it should just work.
>
> If I change opt1 to a separate subnet like 192.168.3.0/24 then it all 
> comes right and works.
>
> Does every nic have to be on a separate subnet to work?
>
> I want to be able to add IPs to each nic and have them all on the same 
> subnet on the lan side.
>
> Am I trying to do something that can't be done?
>