Practice: Application guidance on policy-based routing load balancing (1)

Introduction

Features

At present, Internet cafes have higher and higher requirements on network reliability and stability. Generally, Internet cafes and operators both have two lines to ensure that one line can have another link as a backup when a fault occurs. When both lines are normal, in order to reduce the traffic pressure of one line, the traffic is evenly distributed to another line, which improves the network speed. When a faulty interface is DOWN, the system automatically forwards all traffic to another line, which improves the stability and reliability of the network. To meet the business requirements of Internet cafes, do not interrupt this requirement, and ensure that the services hosted by Internet cafes are not affected.

User Guide

Usage

This feature can be used in a dual-link networking environment where two links share traffic. This ensures the reliability and stability of the network.

Configuration Guide

This Guide uses the 18-22-8 product as an example. This product has two WAN interfaces. Ethernet2/0 and ethernet3/0 are mutually backed up.

You can use the following configuration steps to implement this feature:

1) configure two WAN interfaces as Ethernet links. In this case, the Ethernet direct connection is used as an example;

2) Configure static routes and set the same priority;

3) configure a policy route to evenly distribute traffic to two links.

2. Notes

The two routes have the same priority.

Configure the rule that the route address is an even number and the address is an odd number.

The priority of a policy route is higher than that of a route table. The routing takes effect only when the interface used by the policy route is down.

3 configuration example

Networking requirements

Figure 1 shows the typical networking of two link load balancing.

Vro Ethernet port ETH2/0 connects to ISP1, the network address is 142.1.1.0/30, the Ethernet port ETH3/0 connects to ISP2, the network address is 162.1.1.0/30, and the Ethernet port ETH1/0 connects to the internet cafe LAN, the private IP address is 192.168.1.0/24.