BUG (?) in the ospf ABR LSA Type 3 filtering

simaskvilius · ‎11-26-2007

Hi,

I'm working with following topology: http://www.talpink.lt/images/v.php?id=29126p2.JPG

Device configurations can be found here:

The result of

area 0 filter-list prefix F1 in

command executed in R2 router was very strange, as supposed, this command filtered summary LSA of 10.0.0.0/24 prefix in Area 0 (prefix 10.0.0.0/24 disappears from R3's routing table and LSA database as supposed), however 10.0.0.0/24 is still injected into Area 2 as Type 3 LSA (and to any other areas which are directly connected to R2), this is definitely a bug (probably caused by LSA injection optimizations), type 3 LSA should never be injected from one non-backbone area to another.

mchin345 · ‎12-03-2007

area area-id filter-list prefix {prefix-list-name in | out} specify the out parameter in your ABR (ie) Prefix list applied to prefixes advertised out of the specified area to other areas.