# Dynamic IP Address Pool List

A dynamic IP (DIP) address pool is a range of IP addresses from which the device can dynamically take addresses to use when performing NAT on the source IP address of outgoing or incoming IP packets.

You can link three types of interfaces to Dynamic IP (DIP) pools: physical interfaces and sub-interfaces for network and VPN traffic, and tunnel interfaces for VPN tunnels only.

## Dynamic IP Table

At the top of the Interface DIP list page, you can see the interface to which the dynamic IP pools in the list belong. For example, you see:

Interface: ethernet3/2 (IP/Netmask: 209.122.17.1/24)

The table lists all the DIP pools configured on the device and contains the following information on each one of them:

Incoming NAT: Select this option to direct the device to perform NAT on sessions initiated by incoming traffic, such as SIP or H.323.

ID: Indicates the ID number of the dynamic IP pool.

IP Address Range: Indicates the starting number and the ending number of the dynamic IP address range.

DIP Type: Indicates if port translation is enabled (Port-Xlate) or not (Fix-Port).

Configure: Click Edit to modify the dynamic IP pool entry, or click Remove to remove the entry. Click New to create a new dynamic IP pool.

Note: You cannot remove a DIP pool that is being used by a policy. First, you must either delete the policy that is using the DIP pool, or you can modify the policy to not use the DIP pool.

For more information on creating a new DIP pool, see Dynamic IP Address Pool Configuration.