Small IX IP Blocks

Karl Auer kauer at
Sat Apr 4 23:53:14 UTC 2015

On Sat, 2015-04-04 at 18:02 -0500, Mike Hammett wrote:
> That makes sense. I do recall now reading about having that 8 bit
> separation between tiers of networks. However, in an IX everyone is
> supposed to be able to talk to everyone else. Traditionally (AFAIK),
> it's all been on the same subnet. At least the ones I've been involved
> with have been single subnets, but that's v4 too. 

Think flexible, think big, think future. Limiting yourself to tiny
subnets and assuming your circumstances and requirements will not change
is a recipe for difficult times ahead.

Go as large as you can now, and route between participants. They might
not always be friends with each other, or indeed with you, and the
ability to isolate, redirect, offload, recombine and filter is critical
to the flexibility of your (future) product offering.

Regards, K.

Karl Auer (kauer at

GPG fingerprint: 3C41 82BE A9E7 99A1 B931 5AE7 7638 0147 2C3C 2AC4
Old fingerprint: EC67 61E2 C2F6 EB55 884B E129 072B 0AF0 72AA 9882

More information about the NANOG mailing list