I have a 4510R-E with a Sup engine 6E, running cat4500e-entservicesk9-mz-122-53.SG, and can't seem to get the NAT configured. Every time time I type in ip nat inside on an interface, or try and set up the nat pool, it comes back with an unrecognized command. If I type in ip nat stat, or translations, it will show empty, so I knows of nat, but will not let me configure it. I know it has to be something simple that I am missing. But it is a Friday, and I am kinda tired, and yes ip routing is enabled. Suggestions?