ZyXEL 2WG Guía Del Usuario

ZyWALL 2WG User’s Guide

This chapter covers setting and applying policies used for IP routing.
Traditionally, routing is based on the destination address only and the ZyWALL takes the 
shortest path to forward a packet. IP Policy Routing (IPPR) provides a mechanism to override 
the default routing behavior and alter the packet forwarding based on the policy defined by the 
network administrator. Policy-based routing is applied to incoming packets on a per interface 
basis, prior to the normal routing.

• Use the Policy Route Summary screen (

) to display the current 

policy route entries.

• Use the Policy Route Edit screen (

) to configure a policy route 

to override the default (shortest path) routing behavior and forward packets based on the 
criteria you specify.

• Source-Based Routing – Network administrators can use policy-based routing to direct 

traffic from different users through different connections.

• Quality of Service (QoS) – Organizations can differentiate traffic by setting the 

precedence or ToS (Type of Service)  values in the IP header at the periphery of the 
network to enable the backbone to prioritize traffic.

• Cost Savings – IPPR allows organizations to distribute interactive traffic on high-

bandwidth, high-cost paths while using low-cost paths for batch traffic.

• Load Sharing – Network administrators can use IPPR to distribute traffic among multiple 

paths.