Ip Routing Policy Configuration; Ip Routing Policy Overview; Introduction To Ip Routing Policy - H3C S5600 Series Operation Manual

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IP Routing Policy Configuration

When configuring an IP routing policy, go to these sections for information you are interested in:

IP Routing Policy Configuration Task List

Displaying IP Routing Policy

IP Routing Policy Configuration Example

Troubleshooting IP Routing Policy

The term router in this chapter refers to a router in a generic sense or an Ethernet switch running a

routing protocol.

IP Routing Policy Overview

Routing policy is technology used to modify routing information to control the forwarding path of data

packets. Routing policy is implemented by changing the route attributes such as reachability.

When a router distributes or receives routing information, it may need to implement some policies to

filter the routing information, so as to receive or distribute only the routing information meeting given

conditions. A routing protocol (RIP, for example) may need to import the routing information discovered

by other protocols to enrich its routing knowledge. While importing routing information from another

protocol, it possibly only needs to import the routes meeting given conditions and control some

attributes of the imported routes to make the routes meet the requirements of this protocol.

For the implementation of a routing policy, you need to define a set of matching rules by specifying the

characteristics of the routing information to be filtered. You can set the rules based on such attributes as

destination address and source address of the information. The matching rules can be set in advance

and then used in the routing policies to advertise, receive, and import routes.

A routing protocol can reference an ACL, IP-prefix, as-path, community-list, or routing policy to filter

routing information. The following sections describe these filters.

You can specify a range of IP addresses or subnets when defining an ACL so as to match the

destination network addresses or next-hop addresses in routing information. You can reference an ACL

into a routing policy to filter routing information.

For ACL configuration, refer to the part discussing ACL.

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