3com 5500-SI Manual Do Utilizador

Route Capacity Configuration 265

c Enable OSPF protocol and specifies the number of the area to which the interface 

belongs.

[Switch A]router id 1.1.1.1

[Switch A]ospf

[Switch A-ospf-1]area 0

[Switch A-ospf-1-area-0.0.0.0]network 10.0.0.0 0.255.255.255 

d Import the static routes

[Switch A-ospf-1]import-route static

2 Configure Switch B:

a 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

b 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

c 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

d Configure OSPF to filter the external routes received.

[Switch B-ospf-1]filter-policy 2000 import

Routing information filtering cannot be implemented in normal operation of the 
routing protocol

Check for the following faults: 

■

The if-match mode of at least one node of the Route Policy should be the 

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 

 mode, then all the routing information 

cannot pass the filtering of the Route Policy. 

■

The if-match mode of at least one list item of the ip-prefix should be the 

 

mode. The list items of the 

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, no routes will not pass the 

 filtering. You can define an 

item of permit 0.0.0.0/0 

 32 after the multiple list items in the 

mode so as to let all the other routes pass the filtering (If 

32 is not 

specified, only the default route will be matched). 

In practical networking applications, there is always a large number of routes in the 
routing table, especially OSPF routes. The routing information is usually stored in the 
memory of the Ethernet switch. When the size of the routing table increases, it can 
consume a significant amount of the switch memory.

To solve this problem, the Switch 5500 provides a mechanism to control the size of 
the routing table. This monitors the free memory in the system to determine whether