ZyXEL 2WG Guía Del Usuario
ZyWALL 2WG User’s Guide
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H A P T E R
20
Policy Route Screens
20.1 Policy Route Overview
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.
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.
20.1.1 What You Can Do in the Policy Route Screens
• 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.
criteria you specify.
20.1.2 What You Need To Know About Policy Route
Benefits
• 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.
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.