Cabletron Systems SmartSwitch Router, User'S Reference Manual

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Chapter 13: IP Policy-Based Forwarding Configuration Guide
216 SmartSwitch Router User Reference Manual
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 20 shows an SSR using
an IP policy to classify customers and route traffic to different networks based on
customer type.
Figure 20. Using an IP policy to prioritize service to customers
Traffic from the premium customer is load balanced across two next-hop gateways in the
high-cost, high-availability network. If neither of these gateways is available, then packets
are forwarded based on dynamic routes learned via routing protocols.
Traffic from the standard customer always uses one gateway (200.1.1.1). If for some reason
that gateway is not available, packets from the standard customer are dropped.
Premium Customer
10.50.*.*
Standard Customer
11.50.*.*
ISP
et.1.1
et.1.2
Low-Cost Network
200.1.1.1
High-Cost, High Availability
Network 100.1.1.1
Policy
Router