Configure OSPF Filter Rules
You can configure ABR Type 3 LSA filters for each OSPF process. ABR Type 3 LSA filters allow only specified prefixes to be sent from one area to another area and restrict all other prefixes. You can apply this type of area filtering out of a specific OSPF area, into a specific OSPF area, or into and out of the same OSPF area at the same time. OSPF ABR Type 3 LSA filtering improves your control of route distribution between OSPF areas.
Procedure
| 1 |
Choose , and edit the Firewall Threat Defense device. |
| 2 |
Click Routing. |
| 3 |
(For a virtual-router-aware device) From the virtual routers drop-down list, choose the virtual router for which you are configuring OSPF. |
| 4 |
Click OSPF. |
| 5 |
Select . You can click Edit ( |
| 6 |
Configure the following filter rule options for each OSPF process:
|
| 7 |
Click OK to save the filter rule configuration. |
| 8 |
Click Save on the Routing page to save your changes. |
), or use the right-click menu to cut, copy, past, insert, and delete filter rules. 
) and see What to do next
Continue with Configure OSPF Summary Addresses.