forwarding address question

From: Mustafa Yadav <mustafa.yadav_at_gmail.com>
Date: Sat, 18 Sep 2010 12:17:22 +0300

hi,

as you see below in ospf database for one prefix the forwording address is
141.9.255.8 but in the routing table the next hop is different.Can someone
explain what is the meaning of forwarding address if it is not a next hop in
this case?

 LS age: 1790
  Options: (No TOS-capability, DC)
  LS Type: AS External Link
  Link State ID: 150.9.8.0 (External Network Number )
  Advertising Router: 150.9.5.5
  LS Seq Number: 80000004
  Checksum: 0x9419
  Length: 36
  Network Mask: /24
        Metric Type: 2 (Larger than any link state path)
        TOS: 0
        Metric: 20
        *Forward Address: 141.9.255.8*
        External Route Tag: 0

Rack9R5#$ sh ip route ospf
     51.0.0.0/32 is subnetted, 1 subnets
O E2 51.51.51.51 [110/20] via 193.25.25.2, 01:03:27, Tunnel52
O IA 192.10.9.0/24 [110/1065] via 193.25.25.2, 01:03:27, Tunnel52
     141.9.0.0/16 is variably subnetted, 14 subnets, 2 masks
O 141.9.255.0/24 [110/2] via 141.9.0.8, 01:03:27, FastEthernet0/1
O E1 141.9.6.0/24 [110/1084] via 193.25.25.2, 00:01:33, Tunnel52
O E1 141.9.7.0/24 [110/1084] via 193.25.25.2, 00:01:33, Tunnel52
O 141.9.8.0/24 [110/2] via 141.9.0.8, 01:03:27, FastEthernet0/1
O E1 141.9.36.0/24 [110/1084] via 193.25.25.2, 00:01:33, Tunnel52
O E1 141.9.37.0/24 [110/1084] via 193.25.25.2, 00:01:33, Tunnel52
O E1 141.9.77.0/24 [110/1084] via 193.25.25.2, 00:01:33, Tunnel52
O 141.9.88.0/24 [110/2] via 141.9.0.8, 01:03:27, FastEthernet0/1
O 141.9.123.0/24 [110/1064] via 193.25.25.2, 01:03:27, Tunnel52
     150.9.0.0/16 is variably subnetted, 8 subnets, 2 masks
*O N2 150.9.8.0/24 [110/20] via 141.9.0.8, 01:03:27, FastEthernet0/1*

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Received on Sat Sep 18 2010 - 12:17:22 ART

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