3Com Switch 8800 Configuration Guide Chapter 22 IP Routing Policy Configuration
22-12
2) Configure Switch B:
Configure the IP address of VLAN interface.
[Switch B] interface vlan-interface 100
[Switch B-Vlan-interface100] ip address 10.0.0.2 255.0.0.0
Configure the access control list.
[Switch B] acl number 2000
[Switch B-acl-basic-2000] rule deny source 30.0.0.0 0.255.255.255
[Switch B-acl-basic-2000] rule permit source any
Enable OSPF protocol and specifies the number of the area to which the interface
belongs.
[Switch B] router id 2.2.2.2
[Switch B] ospf
[Switch B-ospf-1] area 0
[Switch B-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255
Configure OSPF to filter the external routes received.
[Switch B-ospf-1] filter-policy 2000 import
22.5 Troubleshooting Routing Policy Symptom 1: Routing information filtering cannot be implemented in normal operation
of the routing protocol
Solution: Check for the following faults:
z The if-match mode of at least one node of the Route-policy should be the permit
mode. When a Route-policy is used for the routing information filtering, if a piece of
routing information does not pass the filtering of any node, then it means that the
route information does not pass the filtering of the Route-policy. When all the
nodes of the Route-policy are in the deny mode, then all the routing information
cannot pass the filtering of the Route-policy.
z The if-match mode of at least one list item of the ip-prefix should be the permit
mode. The list items of the deny mode can be firstly defined to rapidly filter the
routing information not satisfying the requirement, but if all the items are in the
deny mode, any routes will not pass the ip-prefix filtering. You can define an item
of permit 0.0.0.0/0 less-equal 32 after the multiple list items in the deny mode so
as to let all the other routes pass the filtering (If less-equal 32 is not specified, only
the default route will be matched).