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Create a Source NAT Pool

You are here: Network > NAT > Pools.

To add a source NAT pool:

  1. Click Create > Source NAT Pool on the upper-right corner of the Pools page.

    The Create Source NAT Pool page appears.

  2. Complete the configuration according to the guidelines provided in Table 1.
  3. Click OK to save the changes. If you want to discard your changes, click Cancel.

Table 1 describes the fields on the Create Source NAT Pool page.

Table 1: Fields on the Create Source NAT Pool Page

Field

Description

Name

Enter a unique string of alphanumeric characters, hyphens and underscores; maximum length 63-character.

Description

Enter a description for the source NAT pool.
Basic

Routing instance

Select a routing instance from the list.

Pool addresses

Select the source NAT pool addresses in the Available column and the use the right arrow to move them to the Selected column.

To add a new pool address:

  1. Click +.

    The Add Pool Address page appears.

  2. Enter the following details:

    • Name—Enter a name for the pool address.

    • Description—Enter a description for the pool address.

    • Pool address type—Select either IP address or address range for the pool.

    • IP address—Enter IPv4 or IPv6 address of the host.

      Note:

      This option is available only when you select IP address as pool address type.

    • Start Address—Enter the starting range of IPv4 or IPv6 address for the source NAT pool.

      Note:

      This option is available only when you select Address Range as pool address type.

    • End Address—Enter the ending range of IPv4 or IPv6 address for the source NAT pool.

      Note:

      This option is available only when you select Address Range as pool address type.
Advanced
Port Translation

Port translation

Select a port translation option from the list:

  • No Translation

  • Translation with port range—Port range from low to high. Range is 1024 through 65535.

  • Translation with port overloading factor—Port overloading capacity for the source NAT interface.

Shared Address

Enable this option to map many-to-one external IP addresses. This increases NAT resources and improves traffic.

Note:

This option is available only when you select No Translation.

Host address base

Enter IPv4 or IPv6 address used as the host address base.

For example, if the host address base is 198.51.100.30 and the NAT pool uses the range 203.0.113.10 to 203.0.113.20, then 198.51.100.30 translates to 203.0.113.10, 198.51.100.31 translates to 203.0.113.11, and so on.

Port range from

Enter the lower limit of the port range.

Range: 1024 through 65535.

Note:

This option is available only when you select Translation with port range.

Port range to

Enter the upper limit of the port range.

Range: 1024 through 65535.

Note:

This option is available only when you select Translation with port range.

Overloading factor

Enter the port overloading factor value.

Range: 2 through 32.

Note:

This option is available only when you select Translation with port overloading factor.

Address pooling

Specifies that multiple internal IP addresses can be mapped to the same external IP address. Use this option only when the source NAT pool is configured with no port translation.

Paired

Select this option to use in source NAT pools with port translation for applications that require all sessions associated with one internal IP address to be translated to the same external IP address for multiple sessions.

Note:

This option is available only when you enable Address Pooling.

Non-paired

Select this option to use in source NAT pools without port translation for assigning IP addresses using a round-robin fashion.

Note:

This option is available only when you enable Address Pooling.

Overflow pool type

Specify a source pool to use when the current address pool is exhausted:

  • None—No support for overflow.

  • Interface—Allow the interface to support overflow.

  • Pool—Name of the source address pool.

Note:

This option is available only when you select No Translation.

Overflow pool

Select a source address pool from the list.
Utilization Alarm

Upper threshold

Enter an upper threshold percentage for pool address utilization at which an SNMP trap is triggered.

Range: 50 through 100.

Lower threshold

Enter a lower threshold percentage for pool address utilization at which an SNMP trap is triggered.

Range: 40 through 100.

Note:

This option can be set only if you configure the upper threshold value.

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