Domainless Dynamic NAT & PAT with NVI Zero

I have explained a little about domainless NAT & NVI0 here. If you are not sure what this NVI0 is please read that 1st..

Here are some briefings for Domainless Dynamic NAT.. These are same as Domain Dynamic NAT too..

Maps a local address with a pool global addresses..
Need to have one real public IP address for every private IP address..
Cannot permanently bind a public IP address with host like in static NAT..
When the pool is exhausted, router discards the translation..

Let's configure dynamic NAT on R1..

Enable NAT on interfaces..

R1(config)#int e0/0
R1(config-if)#ip nat enable

R1(config)#int e0/1
R1(config-if)#ip nat enable

Create a pool for private IP range..
R1(config)#access-list 10 permit 192.168.1.0 0.0.0.255

Create a pool for public IP range..
R1(config)#ip nat pool DYNAMIC 203.115.41.110 203.115.41.120 netmask 255.255.255.0

Do the mapping..
R1(config)#ip nat source list 10 pool DYNAMIC

As soon as you enter the above commands, you will not see anything on nat translations & routing table like in static NAT.. But when the traffic is generated, they will start to populate..

When PC-1 is pining the server 203.115.41.221; following will be the output.

You will see a new entry for the public IP address in the routing table too to the outside interface..
Note that it will clear this entry when you clear ip nat translations..

If you are doing PAT (Overloading), following will be the command..

R1(config)#ip nat source list 10 interface e0/0 overload