nanog mailing list archives
Re: CIDR Utilization
From: Theodore Baschak <theodore () ciscodude net>
Date: Fri, 30 Oct 2015 21:50:54 -0500
On Oct 30, 2015, at 7:51 PM, John Steve Nash <john.steve.nash () gmail com> wrote: Hi, I'm looking for any tool or a way I could specify a CIDR and the prefixes that are being used within this CIDR and the tool show me all free supernets. <snip>
I've used subnetsmngr for this in the past. Proper usage of it thru the UI forces you to fully allocate (as compared to sparse allocating) your subnets, basically the same way subetting is taught in base level networking certifications. This makes finding the un-used subnets very easy. http://sourceforge.net/p/subnetsmngr/wiki/Home/ <http://sourceforge.net/p/subnetsmngr/wiki/Home/> NIPAP allows you to do the same as well, but will let subnets be sparse allocated, so you won't necessarily have pre-created them waiting to be used later on. http://spritelink.github.io/NIPAP/ <http://spritelink.github.io/NIPAP/> NIPAP also has a nice CLI interface. Both are also open source, full v4/v6. Theo
Current thread:
- CIDR Utilization John Steve Nash (Oct 30)
- Re: CIDR Utilization joel jaeggli (Oct 30)
- Re: CIDR Utilization Theodore Baschak (Oct 30)
- RE: CIDR Utilization Jeremiah Millay (Oct 31)
- Re: CIDR Utilization inetjunkmail (Oct 31)
- Re: CIDR Utilization Baldur Norddahl (Oct 31)