nanog mailing list archives
Re: Small IX IP Blocks
From: Mark Tinka <mark.tinka () seacom mu>
Date: Sun, 5 Apr 2015 06:46:59 +0200
On 5/Apr/15 02:35, Mike Hammett wrote:
Okay, so I decided to look at what current IXes are doing. It looks like AMS-IX, Equinix and Coresite as well as some of the smaller IXes are all using /64s for their IX fabrics. Seems to be a slam dunk then as how to handle the IPv6. We've got a /48, so a /64 per IX. For all of those advocating otherwise, do you have much experience with IXes? Multiple people talked about routing. There is no routing within an IX. I may grow, but an IX in a tier-2 American city will never scale larger than AMS-IX. If it's good enough for them, it's good enough for me. Back to v4, I went through a few pages of PeeringDB and most everyone used a /24 or larger. INEX appears to use a /25 for each of their segments. IX Australia uses mainly /24s, but two locations split a /24 into /25s. A couple of the smaller single location US IXes used /25s and /26s. It seems there's precedent for people using smaller than /24s, but it's not overly common. Cash and address space preservation. What does the community think about IXes on smaller than /24s?
Your main issue with a smaller IPv4 subnet is when you grow, you'll end up having to renumber. This has hit some large exchange points in the recent past. Of course, it's easy to say that you won't grow beyond X members now, but there's no knowing how that will go if you're working hard at your project. Mark.
Current thread:
- Re: Small IX IP Blocks, (continued)
- Re: Small IX IP Blocks Valdis . Kletnieks (Apr 04)
- Re: Small IX IP Blocks Mike Hammett (Apr 04)
- Re: Small IX IP Blocks Karl Auer (Apr 04)
- Re: Small IX IP Blocks Brendan Halley (Apr 04)
- Re: Small IX IP Blocks Mike Hammett (Apr 04)
- Re: Small IX IP Blocks Laszlo Hanyecz (Apr 04)
- Re: Small IX IP Blocks Charles Gucker (Apr 04)
- Re: Small IX IP Blocks Bill Woodcock (Apr 04)
- RE: Small IX IP Blocks Paul Stewart (Apr 05)
- Re: Small IX IP Blocks Will Hargrave (Apr 05)
- Re: Small IX IP Blocks Mike Hammett (Apr 04)
- Re: Small IX IP Blocks Valdis . Kletnieks (Apr 04)
- Re: Small IX IP Blocks Mark Tinka (Apr 04)