Controlling OSPF Routing Information

Configuring OSPF to Import External Routes

Importing the routes discovered by other routing protocols can enrich OSPF routing information.

Configuring OSPF to Import a Default Route

The default route is widely applied on the OSPF network to reduce routing entries in the routing table and filter specific routing information.

Configuring Route Summarization

When a large-scale OSPF network is deployed, you can configure route summarization to reduce routing entries.

Configuring OSPF to Filter LSAs in an Area

Filtering LSAs in an area can prevent unnecessary LSA transmission. This reduces the size of the LSDB on the neighboring router and speeds up network convergence.

Configuring OSPF to Filter LSAs to Be Sent

Filtering the LSAs to be sent on the local router can prevent unnecessary LSA transmission. This reduces the size of the LSDB on the neighboring device and speeds up network convergence.

Configuring OSPF to Filter Received Routes

After a filtering policy is configured for the OSPF routes that need to be delivered to the routing management module, only the routes that match the policy will be added to the routing table.

Configuring OSPF to Filter the Routes to Be Advertised

After a filtering policy is configured for routes imported by OSPF, only the routes that match the policy can be advertised.

(Optional) Configuring OSPF to Discard Specified LSAs

Configuring the Maximum Number of External Routes Supported by the OSPF LSDB

You can set the maximum number of external routes in the LDSB to keep a proper number of external routes.

Verifying the Configuration of OSPF Routing Information Control

After OSPF routing information is controlled, you can check OSPF LSDB information.