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New Member

OSPF NETWORK ADDRESS

I am running some tests leading up to substantial change to our OSPF areas.

As you know our area 0.0.0.0 currently ranges from 10.0.0.0 to 10.31.255.255

and area 1.0.0.0 from 10.32.0.0 to 10.63.255.255 with the following commands

under ospf router:-

network 10.0.0.0 0.31.255.255 area 0.0.0.0

network 10.31.0.0 0.31.255.255 area 1.0.0.0

I want to collapse area 0.0.0.0 to the IP range 10.0.0.0 to 10.1.255.255 and

expand area 1.0.0.0 to the IP range 10.2.0.0 to 10.63.255.255.

I input the following into the test router (ios 11.3.5.t))deleted the

original statements first)

network 10.0.0.0 0.1.255.255 area 0.0.0.0

network 10.2.0.0 0.63.255.255 area 1.0.0.0

When I do "sh run" the statements look like this:-

network 10.0.0.0 0.1.255.255 area 0.0.0.0

network 10.0.0.0 0.63.255.255 area 1.0.0.0

Area 1.0.0.0 seems to extend from 10.0.0.0 to 10.63.255.255 clashing with

area 0.0.0.0? Connected interfaces though seem to get put into the correct

area when I do "sh ip ospf int"

Any ideas? are my statements correct to achieve the objective?

1 REPLY
New Member

Re: OSPF NETWORK ADDRESS

Based on your inverse mask, route summarization is occurring.

http://www.cisco.com/warp/public/104/3.html#12.0

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