CCNP Routing and Switching ROUTE 300-101 Official Cert Guide

NVI

Cisco IOS Release 12.3(14)T introduced a feature called NAT Virtual Interface (NVI), which allows you to do a NAT configuration without the need to specify an interface as being an inside or an outside interface. Specifically, instead of issuing the ip nat inside or ip nat outside command in interface configuration mode, you can issue the ip nat enable command. Not only does this feature make configuration easier, but it also allows traffic to flow between two interfaces that would both be considered inside interfaces, from a classic NAT perspective.

Note

Not all platforms and Cisco IOS versions since Cisco IOS Release 12.3(14)T support the NAT Virtual Interface feature. Therefore, the ip nat enable command might not be accepted on your ...