Section 9.0: IP Services and Protocol-Independent Features

9.1. NAT

  1. Configure NAT for Loopback3 192.168.3.1/24.

  2. The objective is that when sourced from Loopback3 to anywhere on the network, it should be translated using the egress interface. For example, if you ping 122.122.122.122, it will use egress interface Serial1/0.3, whereas if you ping 144.144.144.144, it will use egress interface Serial1/0.1. If you ping 166.166.166.166, it will use egress interface FastEthernet0/0. To configure this multihomed NAT, enter the following:

     ip nat inside source route-map fastethernet0/0 interface FastEthernet0/0 overload ip nat inside source route-map serial1/0.1 interface Serial1/0.1 overload ip nat inside source route-map serial1/0.3 interface Serial1/0.3 ...

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