Why the Networks listed on OSPF database are not on the routing table?

[opc.perera]

Therer are no Distribute-lists. See below 10.0.31.230. The Netowrk and areas are properly defined on the configuration.

Any idea Please??

Thanks

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asydr01#sh ip ospf data adv 10.0.31.230

OSPF Router with ID (10.99.0.1) (Process ID 10)

Router Link States (Area 1)

Link ID ADV Router Age Seq# Checksum Link count

10.0.31.230 10.0.31.230 1999 0x8000005C 0x238D 1

Summary Net Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

10.0.31.230 10.0.31.230 1999 0x80000009 0x80C

10.0.31.231 10.0.31.230 230 0x80000007 0xC08

172.17.200.0 10.0.31.230 230 0x8000000A 0xBBDF

172.17.201.0 10.0.31.230 230 0x80000006 0xC2DA

172.17.255.76 10.0.31.230 230 0x80000009 0x47D5

Summary ASB Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

10.0.31.227 10.0.31.230 230 0x80000006 0x28EF

10.0.31.231 10.0.31.230 230 0x80000006 0xF51F

asydr01#sh ip route 10.0.31.230

% Subnet not in table

[dnagarajachary]

OSPF maintains three tables,

the neighbor table, the topology database and the routing table

the neighbor table contains the immediate neighbor details

the topology table contains the routes to the network. this contains all the possible routes including the best path and the worst path

the routing table contains only the routes which are best paths in the topology table.

so routing table doesnt contain all the details which ospf database has.

Hope this helps...:-)

-Deepu

[bbranch]

You have performed a SHOW IP OSPF DATABASE ADV-ROUTER 10.0.21.230 which shows all LSA's sent from the router with the OSPF Router ID 10.0.21.230.

It is quite common not to include the Rotuer ID in OSPF itself (there is no requirement to do so), this reduces the overall size of the LSA database

As there is no route in the routing table for this address I would suspect that the Router ID has not been included, check the config on 10.0.21.230 to see if there is an OSPF network statement covering the interface associated with the OSPF Router ID.

[opc.perera]

Many Thanks for the explaination...

The 10.0.31.230 is the loopback address we use for the OSPF Router ID and it has neighbours through both interfaces in FULL STATE and have OSPF networks included with correct area numbers.

There is a network 10.0.31.224 0.0.0.31 area 0 command on the OSPF configurations on the router

[thisisshanky]

Additionally to troubleshoot, this link might help

http://www.cisco.com/warp/public/104/26.html