OSPF route in routing table but NOT in database

Hello experts,

Could someone explain how an OSPF route can be present in routing table but not
in the OSPF database? Here is the scenario:

Area 1-----R3-----Area 0-----R4

I am trying to filter a route advertised in Area 1 11.1.1.0/24 from entering
area0:
ip prefix-list TEST seq 5 deny 11.1.1.0/24
ip prefix-list TEST seq 10 permit 0.0.0.0/0 le 32

under OSPF process:
 area 1 filter-list prefix TEST out

As a result route 11.1.1.0 is removed from R4 (both routuing table and database)

However the route is still in R3's routing table even if it is removed from
database:
R3#sh ip route 11.1.1.0
Routing entry for 11.1.1.0/24
  Known via "ospf 1", distance 110, metric 129, type intra area
  Last update from 10.1.23.2 on Serial1/0.32, 00:14:29 ago
  Routing Descriptor Blocks:
  * 10.1.23.2, from 1.1.1.1, 00:14:29 ago, via Serial1/0.32
      Route metric is 129, traffic share count is 1

I thougt so far that a route must be in the database first before it is
installed (or not) in the routing table.

THX

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Received on Mon Aug 02 2010 - 21:19:03 ART