NAT on 1 Physical Interface

[nino.sehovic]

Hi everyone...

I need some help please.

I have a site with a router and all of its ports are already taken except one.

The thing is i need 2 interfaces for a customer that wants a seperate connection to the internet with NAT. Ofcourse they ill have their own 

IP address and own Internal Ip Address.

The external ip address would be 77.77.77.1 (for example) and the inside 10.204.0.0 255.255.0.0

The problem is that i have only 1 interface can i somehow NAT over subinterfaces or Virtual interface?

As far as i have seen on the documentation it is not possible,but perhaps one of u guys has an idea????

Thanks in advance...

[Masoud Pourshabanian]

Before doing NAT, make sure the NEW IP works correctly.  Set that IP under a loopback interface on your router and ping a host on the internet. You need to get response.

If you do not get response, call your ISP.

int loopback 100

ip address 77.77.77.1 255.255.255.255

ping 8.8.8.8 source 77.77.77.1

remove that interface loopback if you receive response.

Masoud