5-5
To do... Use the command... Remarks
Define a rule to match the
next-hop interface of
routing information
if-match interface
interface-type
interface-number
Optional
By default, no matching is performed on
the next-hop interface of routing
information.
Define a rule to match the
next-hop address of
routing information
if-match ip next-hop { acl
acl-number | ip-prefix
ip-prefix-name }
Optional
By default, no matching is performed on
the next-hop address of routing
information.
Define a rule to match the
tag field of OSPF routing
information
if-match tag value
Optional
By default, no matching is performed on
the tag field of OSPF routing information.
Apply a cost to routes
satisfying matching rules
apply cost value
Optional
By default, no cost is applied to routes
satisfying matching rules.
Define an action to set the
tag field of routing
information
apply tag value
Optional
By default, no action is defined to set the
tag field of OSPF routing information.
z A route policy comprises multiple nodes. There is an OR relationship between the nodes in a route
policy. As a result, the system examines the nodes in sequence, and once the route matches a
node in the route policy, it will pass the matching test of the route policy without entering the test of
the next node.
z During the matching, there is an AND relationship between the if-match clauses for a route policy
node. That is, a matching test against a node is successful only when all the matching conditions
specified by the if-match clauses in the node are satisfied.
z If no if-match clauses are specified, all the routes will filter through the node.
z A node can comprise no if-match clause or multiple if-match clauses.
z Each node comprises a set of if-match and apply clauses. if-match clauses define matching rules.
apply clauses specify the actions performed after a matching test against the node is successful,
and the actions can be the attribute settings of routing information.
IP-Prefix Configuration
IP-prefix plays a role similar to ACL and but is more flexible and easier to understand. When IP-prefix is
applied to filtering routing information, its matching object is the destination address information field of
routing information.
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