Is there any way to filter OSPF link-state update by IP address?

[turky]

I have tried distribute-list,but it didn't seem to work for OSPF,but it does work when using EIGRP.

[reinke]

OSPF is a Link-State-Protocol: Routers do not advertise Distance Vectors like EIGRP does. OSPF routers advertise Link State Packets (LSPs), which are identified by a router id. Therefore you might implement routing filters based on the router id.

Be aware that route filtering is not a goal of OSPF, because router in one area should have identical databases.

There is one exception: You can filter incoming routes (ip-addresses). This is a filter running between the link state database and your routing table. OSPF will not put the route into the routing table, but it is still in the database.

Edgar

[Christian Biasibetti]

If is possible for your network ... I suggest you to use Stub & Totaly Stub Area, so you can start with an automatic filter for link-state type 3-4-5 yet.

Bye

Christian Biasibetti

Ivrea - Italy.

[kmuthukamu]

OSPF routes can't be filtered from entering the OSPF database. The distribute-list in command only filters routes from entering the routing table, but it doesn't prevent link-state packets from being propagated.

The command distribute-list out works only on the routes being redistributed by the autonomous system boundary routers (ASBRs) into OSPF. It can be applied to external type 2 and external type 1 routes, but not to intra-area and inter-area routes.

[r-godden]

have you tried under

router ospf x

nei x.x.x.x database-filter all out

[sun816]

EIGRP is DV protocol only,u can do some thing on lsa type 3,4,5.

Of course distibute-list will just avoid certain route be write into routing table as u wish.