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Route Capacity 159
4 Import the static routes
[Switch A-ospf]import-route static
Configure Switch B:
1 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
2 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
3 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]area 0
[Switch B-ospf-area-0.0.0.0]network 10.0.0.0 0.0.0.255
4 Configure OSPF to filter the external routes received.
[Switch B-ospf]filter-policy 2000 import
Troubleshooting Routing
Policies
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
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.
■ 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 defined to rapidly filter
the routing information not satisfying the requirement, but if all the items are
in the deny mode, no routes will 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).
Route Capacity In practical networking applications, there is always a large number of routes in
the routing table, especially OSPF routes and BGP routes. The routing information
is usually stored in the memory of the switch. When the size of the routing table
increases, it can consume a significant amount of switch’s memory.
To solve this problem, Switch 8800 switches provide a mechanism to control the
size of the routing table. They monitor the free memory in the system to
determine whether to add new routes to the routing table, and whether or not to
keep connection with a routing protocol.