3Com 10014299 manual Configure a Matching Rules

482CHAPTER 31: CONFIGURING IP ROUTING POLICY

Define a Matching Rules The if-matchclause defines matching rules to meet the filtering conditions of the routing information of the current routing policy. The matched objects are the attributes of this routing information.

Perform the following configurations in routing policy view.

Table 561 Configure a Matching Rules

Operation	Command
Specify the AS number to be matched at	if-matchas-pathaspath-list-number
the beginning of the AS path in the
route-policy.
Remove the AS number to be matched	undo if-match as-path
from the beginning of the AS path in the
route-policy.
Specify the BGP community attributes to	if-match community-list
be matched in the route-policy.	{standard-community-list-number [
	exact-match ]
	extended-community-list-number }
Remove the BGP community attributes to	undo if-match community-list
be matched from the route-policy.
Specify the ACL and prefix list to be	if-match ip address { acl-number
matched in the route-policy.	ip-prefixprefix-list-name }
Remove the ACL and prefix list to be	undo if-match ip address [ ip-prefix
matched from the route-policy.	]
Specify the interface to be matched in the	if-match interface [ type number ]
route-policy.
Remove the interface to be matched from	undo if-match interface
the route-policy.
Specify the route-policy-matching	if-match ip next-hop { acl-number
next-hop of the routing information.	ip-prefixprefix-list-name }
Remove the route-policy-matching	undo if-match ip next-hop [ ip-prefix
next-hop of the routing information.	]
Specify the cost of the routing information	if-match cost cost
to be matched in the route-policy.
Remove the cost of the routing	undo if-match cost
information to be matched in the
route-policy
Specify the tag of OSPF routing	if-match tag tag-value
information to be matched in the
route-policy.
Delete the tag of OSPF routing	undo if-match tag
information to be matched in the
route-policy.
Specify the matched OSPF route type (i.e.	if-match route-type { internal
internal or external) in the routing policy.	external }
Delete the matched OSPF route type in the	undo if-match route-type
routing policy

By default, AS regular expression, community list, interface type, IP address range, metric value, OSPF tag field and OSPF routing information type are not matched.

Note that:

■For one routing policy node, the if-match clauses of the same part use Boolean “AND” operations in the matching process so the routing information cannot