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Help understanding different ways to write OSPF 'area'

Folks, what does the area below represent in decimal again? I am used to write as "area 0", "area 51", etc.

router ospf 1000

network 11.183.113.120 0.0.0.7 area 0.0.0.117

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Bronze

Re: Help understanding different ways to write OSPF 'area'

It represents Area 117

R1 configured as area 0.0.0.117

R1#sh ip os int bri

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Fa0/0 1 0.0.0.117 192.168.12.1/24 1 BDR 1/1

R1#sh ip os nei

Here is the neighbor.

Neighbor ID Pri State Dead Time Address Interface

23.3.3.3 1 FULL/DR 00:00:31 192.168.12.2 FastEthernet0/0

At the neighbor:

R2#sh ip os int bri

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Fa0/0 1 117 192.168.12.2/24 1 DR 1/1

R2#sh ip os neigh

Neighbor ID Pri State Dead Time Address Interface

13.3.3.3 1 FULL/BDR 00:00:31 192.168.12.1 FastEthernet0/0

Advertising a link from the neighbor show as intra area:

R1#sh ip route 2.2.2.2

Routing entry for 2.2.2.2/32

Known via "ospf 1", distance 110, metric 2, type intra area

HTH,

__

Edison.

1 REPLY
Hall of Fame Super Bronze

Re: Help understanding different ways to write OSPF 'area'

It represents Area 117

R1 configured as area 0.0.0.117

R1#sh ip os int bri

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Fa0/0 1 0.0.0.117 192.168.12.1/24 1 BDR 1/1

R1#sh ip os nei

Here is the neighbor.

Neighbor ID Pri State Dead Time Address Interface

23.3.3.3 1 FULL/DR 00:00:31 192.168.12.2 FastEthernet0/0

At the neighbor:

R2#sh ip os int bri

Interface PID Area IP Address/Mask Cost State Nbrs F/C

Fa0/0 1 117 192.168.12.2/24 1 DR 1/1

R2#sh ip os neigh

Neighbor ID Pri State Dead Time Address Interface

13.3.3.3 1 FULL/BDR 00:00:31 192.168.12.1 FastEthernet0/0

Advertising a link from the neighbor show as intra area:

R1#sh ip route 2.2.2.2

Routing entry for 2.2.2.2/32

Known via "ospf 1", distance 110, metric 2, type intra area

HTH,

__

Edison.

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