ospf route summarisation : Cannot summarize

[jordan-jj]

I have  ospf summarisation as below 

Router 0 can still view all the routes in router 2 even after summarised at router 0 

[Jon Marshall]

You presumably mean router 1 can still view all the loopback routes on router 2 ?

If so it because you have the wrong subnet mask in your area range command and are therefore not matching any of the loopback networks.

Jon

[Georg Pauwen]

Hello,

the mask for the area range is incorrect. You need to use a /19 mask to summarize the three networks:

area 1 range 192.168.0.0 255.255.224.0

[Julio E. Moisa]

Hi Jordan

I agree with Jon and Georg, your configuration on Router0 should be:

router ospf 100
area 1 range 192.168.0.0 255.255.224.0
network 10.10.10.0 0.0.0.255 area 0
network 30.30.30.0 0.0.0.255 area 1

Router 1 should be the summarized network like an Inter Area network. 

O IA  192.168.0.0/19 [110/21] via 10.10.10.1, 00:00:02, FastEthernet0/1

:-)