nanog mailing list archives
Re: IPv6 Default Allocation - What size allocation are you giving out
From: Daniel Ankers <md1clv () md1clv com>
Date: Thu, 9 Oct 2014 09:46:48 +0100
On 9 October 2014 05:40, Mark Andrews <marka () isc org> wrote:
In message < 482678376.131852.1412829159356.JavaMail.zimbra () snappytelecom net>, Faisal Imtiaz writes:Only short sighted ISP's hand out /56's to residential customers.I am curious as to why you say it is short sighted? what is thetechnical orotherwise any other reasoning for such statement ?256 is *not* a big number of subnets. By restricting the number of subnets residences get you restrict what developers will design for. Subnets don't need to be scares resource. ISP's that default to /56 are making them a scares resource.
My moment of clarity came when I got a /56 routed to my house and started using it. I started off thinking that 256 was a huge number of subnets, more than I could ever need. What I realised was that (sticking to best practices) a /56 only allows you one further level of delegation, and I found that to be more of a barrier than the number of subnets. In the same way that you stop thinking "/64 is a lot of addresses" and start thinking "/64 is a network" I find it helps to stop thinking "/48 is 65536 subnets" and start thinking "/48 allows you up to 4 levels of delegation." Dan
Current thread:
- Re: IPv6 Default Allocation - What size allocation are you giving out, (continued)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mark Andrews (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out David Conrad (Oct 08)
- RE: IPv6 Default Allocation - What size allocation are you giving out Peter Rocca (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Karl Auer (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mark Andrews (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Gary Buhrmaster (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Hugo Slabbert (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Daniel Ankers (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Karl Auer (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Saku Ytti (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Saku Ytti (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Mikael Abrahamsson (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Owen DeLong (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out James R Cutler (Oct 09)
- Re: IPv6 Default Allocation - What size allocation are you giving out Faisal Imtiaz (Oct 08)
- Re: IPv6 Default Allocation - What size allocation are you giving out Philip Dorr (Oct 08)