Filtering in OSPF routes without "area" command?

[linus-ardstal]

Hi! Is there a way to filter OSPF routes without the "Area" command?
I could swear I've done it before, but I can't seem to replicate it again.

I am in CML, and my topology is R1--R2--R3.

Link between R1 to R2 is area 0, R2 to R3 area 1.

From what I recall from my previous attempts, I used a distribute-list to filter routes from R1 to R3 by placing it on the ABR, R2. Now, I have tried using a prefix-list in my distribute-list both in and out of R2. In of course removes it from R2's routing table, but I do have a memory of it removing the route from R3 aswell?

Answers appreciated. Thanks!

[MHM Cisco World]

area <X> filter-list prefix <> IN/OUT

this command can use instead of area range

MHM

[linus-ardstal]

That is using the Area command though.

[MHM Cisco World]

area BUT not area range 

MHM

[linus-ardstal]

That is not what I asked for, but thanks anyways.

[MHM Cisco World]

In of course removes it from R2's routing table, but I do have a memory of it removing the route from R3 aswell?
you can not use distribute-list to remove prefix from DB of OSPF so you have only two option 
1- area range 

2- area filter-list 

Route Filtering Using the distribute-list Command > CCNP Routing and Switching Portable Command Guide: Configuration of Redistribution | Cisco Press

that all I have 

goodluck 

MHM

[linus-ardstal]

Alright. Thanks for the help, maybe I mixed it up.

[linus-ardstal]

Managed to make it work again. I added another router:

R1--R2--R3--R4.

I made a prefix-list on R3 denying the link between R1 to R2 from being advertised to R4. On R3: "Distribute-list prefix prefix in", R3 being ABR between area 0 and area 1, this prevented the route from being learned on R4.

[MHM Cisco World]

One prefix or ALL prefix will effect by this list?
add LO in R1 and see if R4 see it or not 

I think you make all R1/R2 hidden from R4 not only one prefix 

MHM

[linus-ardstal]

The link between R1-R2 is removed, but R1's loopback is still visible on R4.

"Ip prefix-list NOR1 deny 12.12.12.0/29"

"Ip prefix-list NOR1 permit 0.0.0.0/0 le 32"

"Distribute-list prefix NOR1 in" on R3

The route to 10.10.10.1 (R1's lo0) is still visible on R4.

[MHM Cisco World]

In R4 and R3 can I see show ip route