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OSPF Design NSSA

Posted on 2016-08-03
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I have the attached OSPF Design. There is Area 0 (Backbone) & there is AREA 10 which is NSSA. I have the subnet 10.10.10.0/22 in this area. I have been exhausted with the existing subnet & I would require to use another subnet say 20.20.20.0/22
The OSPF is established between the L3 Switches & the Routers using IP from the 10.10.10.0/22 subnet.

I would like to know is it possible to use another subnet in the same NSSA Area (Area 10)
If possible should i need to have another OSPF neig between the L3 switches & the routers from the subnet 20.20.20.0/22

Request your inputs.OSPF.png
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Question by:SrikantRajeev
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SIM50 earned 2000 total points (awarded by participants)
ID: 41742444
First of all, why are you using NSSA instead of just stub? Are you importing any routes into Area 0 from  Area 10?

You can have more than one network per area, just try to summarize properly at ABR.
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by:SrikantRajeev
ID: 41746616
No I am not importing any routes into Area 0. The reason why I am using NSSA instead of just Stub is due to the existing restriction I have at present.
Ok got your point . I can have additional network per area.
Thanks
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by:SIM50
ID: 41772807
OSPF areas are not limited to one network.
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by:SrikantRajeev
ID: 41873370
Thanks.
In the above scenario how can i insert the 20.20.20.0/22 network into the existing NSSA Area.
Can i have the same area for this network or should i use different area for this new network.

Is it recommended to use static route or use OSPF only.
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