Dynamic NAT configuration differs from static NAT but it also has some similarities. It requires that each
interface be identified as either an inside or outside interface but the static mapping is not required. In
addition, a pool of inside global addresses needs to be defined.
The ip nat inside source command is used to identify which inside local IP addresses need to have
their addresses translated.
The ip nat pool command defines the set of IP addresses to be used as inside global addresses.
The two show commands used to trouble shoot static NAT can also be used to troubleshoot dynamic NAT.
In addition to these you can use the debug ip nat command. This command causes the router to issue a
message every time a packet has its address translated for NAT.