Displaying And Maintaining Ip Route Policy; Ip Route Policy Configuration Example; Controlling Rip Packet Cost To Implement Dynamic Route Backup - 3Com WX3000 Series Operation Manual

To do...
Define a rule to match the
next-hop address of
routing information
Apply a cost to routes
satisfying matching rules
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.
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.
If no if-match clauses are specified, all the routes will filter through the node.
A node can comprise no if-match clause or multiple if-match clauses.
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.

Displaying and Maintaining IP Route Policy

To do...
Display route policy
information

IP Route Policy Configuration Example

Controlling RIP Packet Cost to Implement Dynamic Route Backup

Network requirements
The required speed of convergence in the small network of a company is not high. The network
provides two services. Main and backup links are provided for each service for the purpose of reliability.
The main link of one service serves as the backup link of the other. The two services are distinguished
by IP addresses. If a fault occurs to the main link of one service, dynamic backup can prevent service
interruption.
According to the network requirements, the network topology is designed as shown in
Use the command...
if-match ip next-hop acl
acl-number
apply cost value
Use the command...
display route-policy
[ route-policy-name ]
4-4
Remarks
Optional
By default, no matching is performed on
the next-hop address of routing
information.
Optional
By default, no cost is applied to routes
satisfying matching rules.
Remarks
Available in any view
Figure 4-1.