OSPF external route

[Netzwerker]

Hi,

Please how to filter OSPF external route (E2) from area 0 to area 2?

I tried with distributed-list  but it filters all networks comes from area 0 even I specifity the @ip of the exernal route !

[balaji.bandi]

Can you post the config you using and where you applied that list ?

[Netzwerker]

this is my distributed-list: R2 this router in area 2 and I want to filter 10.10.3.0 (E2) from area 0 to area 2 !

R2(config)#access-list 10 deny 10.10.3.0 0.0.0.255
R2(config)#router ospf 20
R2(config-router)#distribute-list 10 in serial 1/0

this config can filter in R2 but not in R7 (R2 and R7 are in the area 2)

you can see the attached capture ;

[Sergey Lisitsin]

Hello,

The filtering between areas is not done on the interface level, it is done using filter-list for area. Here is a great document explaining the inter-area filtering.

Susan_Mansfield_FILTERING_WITH_OSPF_-_Technical_Overview (cisco.com)

[Netzwerker]

I tried with this config  in the ABR (R5) betwen area 0 and area 2: 

R5(config)#ip prefix-list net3 deny 10.10.3.0/24
R5(config)#router ospf 1
R5(config-router)#area 2 filter-list prefix net3 in

but it's not working for the E2 route !