3com 3.01.01 Manuale Utente

An ip-prefix is identified by the ip-prefix name. Each ip-prefix can include multiple 
list items, and each list item can specify the match range of the network prefix 
forms, and is identified with a index-number. The index-number designates the 
matching check sequence in the ip-prefix. 

During the matching, the router checks list items identified by the 
sequence-number in ascending order. Once a single list item meets the condition, 
it means that it has passed the ip-prefix filtering and does not enter the testing of 
the next list item.

The community list is only used in BGP. The routing information packet of BGP 
includes a community attribute domain to identify a community. The community 
list specifies the match condition target for the community attribute. 

The definition of the community list is already implemented in the BGP 
configuration. 

Configuring a routing policy includes tasks described in the following sections:

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A route policy can include multiple nodes. Each node is a unit for the matching 
operation. The nodes are tested again by sequence-number.

Perform the following configurations in system view.

The permit argument specifies that if a route satisfies all the if-match clauses of a 
node, the route passes the filtering of the node, and the apply clauses for the 
node are executed without taking the test of the next node. If a route does not 
satisfy all the if-match clauses of a node, however, the route takes the test of the 
next node. 

The deny argument specifies that the apply clauses are not executed. If a route 
satisfies all the if-match clauses of the node, the node denies the route and the 

Table 132   Defining a Route Policy

Enter Route policy view

route-policy route-policy-name { permit | 
deny } node { node-number }

Remove the specified route-policy

undo route-policy route-policy-name [ 
permit | deny | node node-number ]