Chapter 15: IP Policy-Based Forwarding Configuration Guide

The following is the IP policy configuration for the Policy Router in Figure 20:

interface create ip user-a address-netmask 10.50.1.1/16 port et.1.1 interface create ip user-b address-netmask 11.50.1.1/16 port et.1.2

acl user-a-http permit ip 10.50.0.0/16 207.31.0.0/16 any http 0 acl user-a permit ip 10.50.0.0/16 207.31.0.0/16 any any 0

acl user-b permit ip 11.50.0.0/16 any any any 0

ip-policy net-a permit acl user-a-http next-hop-list 100.1.1.1 action policy-first sequence 20

ip-policy net-a permit acl user-a next-hop-list 200.1.1.1 action policy- only sequence 25

ip-policy net-a apply interface user-a

ip-policy net-b permit acl user-b next-hop-list 200.1.1.1 action policy- first

ip-policy net-b apply interface user-b

Prioritizing Service to Customers

An ISP can use policy-based routing on an access router to supply different customers with different levels of service. The sample configuration in Figure 21 shows an SSR using an IP policy to classify customers and route traffic to different networks based on customer type.

Premium Customer

10.50.*.*

Standard Customer

11.50.*.*

ISP

High-Cost, High Availability

Network 100.1.1.1

et.1.1

Policy

Router

et.1.2

Low-Cost Network

200.1.1.1

Figure 21. Using an IP Policy to Prioritize Service to Customers

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Cabletron Systems 9032578-05 Prioritizing Service to Customers, Using an IP Policy to Prioritize Service to Customers