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# ip nat pool

#### Syntax

ip nat pool name [ startIpAddress endIpAddress ]
{ netmask networkMask | prefix-length length }

no ip nat pool name

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Creates an address pool from which the NAT router obtains an address when performing a dynamic translation. You can create address pools with either a single range or multiple, nonoverlapping ranges. The no version removes the NAT pool.

| Note: The router will not allow you to remove a pool that has allocations outstanding. Before removing this type of pool, you must remove the dynamic translation, clear any outstanding translations, and then remove the pool.

| Caution: Specifying a range in “single line” mode from the CLI replaces all other ranges. You cannot specify a range in this mode if any existing ranges are in use. To add additional ranges, issue this command to access IP NAT Pool Configuration mode.

#### Options

- name—Name of the address pool; 32 alphanumeric characters maximum
- startIpAddress—First IP address (inclusive) in the NAT pool range you are creating; omitting this value in the command (along with endIpAddress) launches the IP NAT Pool Configuration mode, in which you can enter multiple, discontinuous ranges
- endIpAddress—Last IP address (inclusive) in the NAT pool range you are creating; omitting this value in the command (along with startIpAddress) accesses IP NAT Pool Configuration mode, in which you can enter multiple, discontinuous ranges
- ipAddressMask—Subnet mask for any NAT pool ranges you specify
- length—Length of the network prefix; the number of bits masking the base address that results in the address that you want to match

#### Mode

Global Configuration

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