3Com S7906E - Switch, Руководство по настройке

Страница: 925 / 2621

1-1
1
Route Policy Configuration
A route policy is used on a router for route filtering and attributes modification when routes are received,
advertised, or redistributed.
When configuring route policy, go to these sections for information you are interested in:
z
Introduction to Route Policy
z
Route Policy Configuration Task List
z
Defining Filters
z
Configuring a Route Policy
z
Displaying and Maintaining the Route Policy
z
Route Policy Configuration Example
z
Troubleshooting Route Policy Configuration
z
The term “router” in this document refers to a router in a generic sense or a Layer 3 switch.
z
EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
z
Route policy in this chapter involves both IPv4 route policy and IPv6 route policy.
Introduction to Route Policy
Route Policy and Policy Routing
A route policy is used on a router for route filtering and attributes modification when routes are received,
advertised, or redistributed.
Policy routing, also called policy based routing (PBR) is a routing mechanism based on a user-defined
policy.
This chapter describes only route policy configuration and usage.
To configure a route policy, you need to define some filters based on the attributes of routing information,
such as destination address, advertising router’s address and so on. The filters can be set beforehand
and then applied to the route policy.
Filters
There are six types of filters: ACL, IP prefix list, AS path ACL, community list, extended community list
and route policy.