Go to your subnet in "Manage Subnets & IP Addresses" and click "Add IP range", provide the range from 0 to 255 - it will fill the gaps (shouldn't override already existing addresses).
If you are going to use automatic scan, it would be easier to just import subnets, and let IPAM scan and mark used addresses.
Hope that helps.
We have over 1000 subnets so I wanted to find something to prevent me from doing this on every subnet one by one, and automatic scanning would not take into account every reserved address and objects not reponding to ping..
But yes, importing subnets and scan the whole network seems to be good. I actually made it by importing all the IP addresses, it didn't work with 60k+ lines excel documents but turns out it does with 30k lines at a time.
Thank you for your answer !
I just configured IPAM for my company and we have over 1000 subnets broken down every which way. Their is no easy way to do this except by going to each individual subnet and adding the IP Address range.
1 of 1 people found this helpful
Thank you for your answer.
I may add that, to avoid doing this for every subnets, you can always use Excel's macros to fill a document with every IP addresses. However, you need to do it before importing your existing addresses or use another macro (more complicated) to fill the used IP in the previous document with all the empty addresses. The formula to get a subnet width from its mask is :
//with b the broadcast byte
//with n the network byte
//with m the mask
if : m>=24 (b is the 4th byte) b= n+ 256/(2^(m-24))-1
if 16<m<24 (b is the 3rd byte) b= n+2^(24-m)-1
I'm joining the macro from excel (don't pay attention to the limits witch corresponds to the number of subnets we have, or the number of the rows, depending on the configuration of your excel document) .