CISCO IOS in a Nutshell

Name

ip nat pool — global

Synopsis

ip nat pool name 
               starting-address 
               ending-address [netmask value | 
    prefix-length length] [type rotary]
no ip nat pool name 
               starting-address 
               ending-address [netmask value | 
    prefix-length length] [type rotary]

Configures

The IP address pool to be used in the NAT configuration

Default

None

Description

This command defines a sequential range of IP addresses to use with NAT configurations.

name

Name of the address pool.

starting-address

The beginning of the pool’s IP address range.

ending-address

The last IP address in the pool.

netmask value

Specifies the netmask for the pool address range.

prefix-length length

Specifies the number of ones in the bitmask.

type rotary

Optional. Specifies that the range of IP addresses corresponds to real hosts for which load distribution should occur. This means that the pool is defined as a round-robin set of address for load balancing. As new TCP connections are made, a new address is selected from the pool. Non-TCP traffic passes through without translation.