[j-nsp] Filtering OSPF routes across areas

Daniel Lete daniel.lete at heanet.ie
Wed Mar 5 05:14:29 EST 2008

Hello Junaid,
You will need to do so in your ABR with the area-range command and the restrict 

Take into account that LSA Type 5 will not be affected by that command, it only 
controls how LSA Type 3 are injected into adjacent areas. It will apply though 
in the case your area is nssa and how LSA Type 7 are injected, or not (restrict 
switch again), as LSA Type 5 into area 0.
Hope it helps,

Junaid wrote:
> Hi,
> There seems to be a similar question posted earlier but that did not
> solve my problem. Is there any way to filter OSPF routes from crossing
> area boundary. Like we tag the advertisements from where they are
> generated/injected and drop them at the ABR so that they do not enter
> the other area?
> Thanks
> Regards,
> Junaid
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Daniel Lete Murugarren
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