3com 10014299 Betriebsanweisung

This chapter covers the following topics:

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IP policy routing is a mechanism in which messages are transmitted and forwarded 
by strategy without going through the routing table. When a router is forwarding 
a packet by policy routing, it is first filtered by a route policy which decides the 
packets to be forwarded and to which router.

The user configures the IP policy for routing. It is composed of a group of if-match 
clauses and a group of apply clauses. Only when all 

 clauses of policy 

routings are fully satisfied are the apply clauses in the policy routings executed in 
sequence, to affect the message forwarding.

At present, two if-match clauses, 

 and 

, 

are provided.

 clause defines the operation of the strategy. there are five apply clauses: 

, 

, 

, 

, 

. They are executed in sequence until 

the operation can proceed.

There are two kinds of policy routings: interface policy routing and local policy 
routing. Interface policy routing is configured in interface view and performs 
strategic routing for messages from this interface. Local policy routing is 
configured in system view and performs policy routing for messages generated by 
this host. Generally, the local policy routing must not be configured.

The policy routing can be used for security and load balancing.

IP policy routing configuration includes:

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