I have been tasked with setting up a 2900 series router to support a new Metro Ethernet connection to the Internet for a customer. Here is the scenario necessary for the configuration:
1) The connection to the Internet is on a slash 30 network (for example purposes, lets say the number is 18.104.22.168/30. I will be configuring the .94 address on the Ethernet interface which faces the Internet, and the Gateway address will be .93. This will be on the G0/0 interface.
2) The network that i have to use on what we can call the "Inside" is 192.168.15.0/24. I will be using a DHCP scope on the router to hand out addresses to clients. This will be on the G0/2 interface.
3) The ISP will be routing a large part of a routable Class C network to us via the /30 network. Lets say that addresses 22.214.171.124-254 will be available. Because these are publicly routable addresses, I need for these routable addresses to somehow be NAT'd against the 192.168.15.0 addresses off of the inside interface, so that users on the inside will be able to have one on one NAt connection between the 15. network and the 206.248.224 network.
Do I need to somehow configure a subinterface? If so, where should I configure it?
If your router is not going to have an IP that belongs to the 126.96.36.199-254 range, then just create the appropiate NAT
statements on your router to those IPs and have the ISP route back to your routers those packets.