Cabletron Systems 9032578-05 IP Policy Configuration Examples, Routing Traffic to Different ISPs

Chapter 15: IP Policy-Based Forwarding Configuration Guide

IP Policy Configuration Examples

This section presents some examples of IP policy configurations. The following uses of IP policies are demonstrated:

•Routing traffic to different ISPs

•Prioritizing service to customers

•Authenticating users through a firewall

•Firewall load balancing

Routing Traffic to Different ISPs

Sites that have multiple Internet service providers can create IP policies that cause different user groups to use different ISPs. You can also create IP policies to select service providers based on various traffic types.

In the sample configuration in Figure 20, the policy router is configured to divide traffic originating within the corporate network between different ISPs (100.1.1.1 and 200.1.1.1).

Group user-a

10.50.*.*

Group user-b

11.50.*.*

ISP1

100.1.1.1

et.1.1

Policy

Router

et.1.2

ISP2

200.1.1.1

Figure 20. Using an IP Policy to Route Traffic to Two Different ISPs

HTTP traffic originating from network 10.50.0.0 for destination 207.31.0.0/16 is forwarded to 100.1.1.1. Non-HTTP traffic originating from network 10.50.0.0 for destination 207.31.0.0/16 is forwarded to 200.1.1.1. All other traffic is forwarded to 100.1.1.1.

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