Configuring a Static Source Tracing Algorithm

Usage Scenario

A static NAT source tracing algorithm is in essence a set of formula. The input is the private IP address range, public IP address range, port segment size, and port range. The output is the mapping between private IP addresses and public IP addresses/port range. When a device uses a static source tracing algorithm to implement NAT, the mapping between the private IP address range, public IP address range, and port range is fixed. In this case, NAT source tracing can be performed for NAT source tracing NEs, such as the AAA server, based on the algorithm so long as the source tracing algorithm parameters that are the same as those on the NAT device are obtained, instead of depending on the source tracing logs sent by NAT devices.

The static source tracing algorithm applies to centralized NAT. In the centralized NAT scenario, if the static source tracing algorithm is configured, load balancing can also be configured. Figure 1 shows network deployment for static source tracing in centralized deployment mode.

Figure 1 Networking diagram for a static NAT source tracing algorithm

Pre-configuration Tasks

Before configuring a static NAT source tracing algorithm, complete the following tasks:

• Configure data link layer protocol parameters and IP addresses for interfaces so that the data link layer protocol on each interface can go Up.