Is there a software on the market that is capable of designing large scale ip addressing scenarios?
There are several. Take a look at:
1. Infoblox. http://www.infoblox.com/products/ipam-winconnect.cfm
3. The Men and Mice Suite. http://www.menandmice.com/solutions/suite/default.aspx
See also Network World's roundup at http://www.networkworld.com/buyersguides/guide.php?cat=876558 and their product testing at http://www.networkworld.com/reviews/2007/120307-ip-address-management-test.html
These products are focused on IP Address Management, of which design is only a part. As far as a design-only tool, I am not familiar with any.