3Com 8800 Configuration Manual page 267

3Com Switch 8800 Configuration Guide
satisfies all the if-match clauses of the node, it will be denied by the node and will not
take the test of the next node. If not, however, the route will take the test of the next
node.
The nodes have the "OR" relationship. In other words, the router will test the route
against the nodes in the route-policy in sequence. Once a node is matched, the
route-policy filtering will be passed.
By default, the route-policy is not defined.
Note: If multiple nodes are defined in a route-policy, at least one of them should be in
permit mode. Apply the route-policy to filter routing information. If the routing
information does not match any node, the routing information will be denied by the
route-policy. If all the nodes in the route-policy are in deny mode, all routing information
will be denied by the route-policy.
II. Defining if-match clauses for a route-policy
The if-match clauses define the matching rules. That is, the filtering conditions that the
routing information should satisfy for passing the route-policy. The matching objects are
some attributes of routing information.
Perform the following configuration in route policy view.
Table 22-2 Define if-match conditions
Match the AS path domain of the BGP
routing information
Cancel the matched AS path domain of the
BGP routing information
Match the community attribute of the BGP
routing information
Cancel the matched community attribute of
the BGP routing information
Match the destination address of the
routing information
Cancel the matched destination address of
the routing information
Match the next-hop interface of the routing
information
Cancel the matched next-hop interface of
the routing information
Match
information
Operation
the next-hop of
Chapter 22 IP Routing Policy Configuration
if-match as-path acl-number
undo if-match as-path
if-match
{
[
adv-community-number }
undo if-match community
if-match { acl acl-number | ip-prefix
ip-prefix-name }
undo if-match { acl | ip-prefix }
if-match interface { interface-type
interface-number }
undo if-match interface
if-match
the routing
acl-number
ip-prefix-name }
22-4
Command
community
basic-community-number
whole-match ]
ip next-hop
| ip-prefix
|
{ acl