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Thanks for you reply. Then it's just me that have misunderstood this function, but thanks again for the clarification

I'm definitely not trying to make a complicated structure. I just want to bulk add subnet and have these subnets added as supernet. Please see attached step.by-step what I'm trying to do 

Hi, Really need this feature, and as I can see its not yet implemented on ver. 2020.2.......very impressive.....NOT :o( Rgds, Jesper

This seems more to be a work around than a solution

I will see if this is what I need and get back to you. Thanks

I found out that IPAM is only scanning subnet, NOT supernet......that sucks. Meaning that I can't create a supnetnet (to later on to split into smaller subnets). and it's still not possible to change a supernet into a subnet and vice versa. Rgds, Jesper