Problems with preserving one public IP address on NAT enable 827

[TimDimond]

Hello there,

I have a Cisco 827 router with NAT enabled. I have several PAT commands working fine. My ISP routes me a /29 network to the routers Dialer1 interface. My internal network uses 192.168.0/24. I have several of the following commands forwarding specific ports to several internal servers that work fine:

ip nat inside source static tcp x.x.x.x 6565 x.x.x.x 6565 extendable

BUT, what I need to do is route a seperate public IP address from the network assigned to me by my ISP onto a telephone switch that sits on the ethernet port and has the same public IP address assigned to it. i.e. route all traffic recieved on dialer1 interface for 212.89.80.3 to 212.89.80.3 on the ethernet0 interface. Is it as simple as adding a route or do I need some additional commands? I don't really want to use a NAP / PAT command as the telephone system doesn't like using a NATed IP for its' VoIP links.

Any help would be most appreciated.

 

[sensey]

You can use the secondary ip address on the ethernet interface, tath is if the ip add of the switch and the ether are n the same network separated from the first one that you had.