Configuring Basic NAT Functions

Basic NAT functions include the NAT address pool, CGN global address pool, port allocation, ECMP and trunk load balancing, NAT policy template, and next-hop IP address for redirection.

Usage Scenario

Basic NAT function configurations are as follows:

A NAT instance is bound to a NAT service board on a device. The device sends packets to the NAT service board for NAT processing.
A public IPv4 address range in a NAT address pool can be assigned to a specific NAT instance so that the instance can translate IPv4 addresses between public and private networks.

Prerequisites

Before you configure basic NAT functions, complete the following tasks:

Verify that a service board is working properly.
Configure data link layer protocol parameters and IP addresses for interfaces so that the data link layer protocol on each interface can go Up.

Binding a Service Board to a NAT Instance: Only after a NAT instance is created and bound to a NAT service board, a device can direct packets to the NAT service board and run NAT to process the packets.

Creating a NAT Address Pool: A NAT address pool can be created so that you can define a public IPv4 address range for the NAT address pool and assign the address pool to a specific NAT instance before the instance translates between private and public IPv4 addresses.

(Optional) Setting a Next-Hop IP Address to Which a Route Is Redirected: Set the IP address of a next hop to which a route is redirected.

Verifying the Configurations of Basic NAT Functions: Verify the configurations of basic NAT functions.