Re: /27 the new /24

[Matthew Kaufman <matthew () matthew at>]

Cheaper than buying everyone TCAM

Matthew Kaufman

(Sent from my iPhone)

> On Oct 2, 2015, at 8:32 AM, Mike Hammett <nanog () ics-il net> wrote:
>
> Much m ore than I'm willing to spend. ;-) 
>
>
>
>
> ----- 
> Mike Hammett 
> Intelligent Computing Solutions 
> http://www.ics-il.com 
>
>
>
> Midwest Internet Exchange 
> http://www.midwest-ix.com 
>
>
> ----- Original Message -----
>
> From: "Matthew Kaufman" <matthew () matthew at> 
> To: "Justin Wilson - MTIN" <lists () mtin net> 
> Cc: "NANOG" <nanog () nanog org> 
> Sent: Friday, October 2, 2015 9:48:33 AM 
> Subject: Re: /27 the new /24 
>
> A /24 isn't that expensive yet... 
>
> Matthew Kaufman 
>
> (Sent from my iPhone) 
>
> > On Oct 2, 2015, at 7:32 AM, Justin Wilson - MTIN <lists () mtin net> wrote: 
> >
> > I was in a discussion the other day and several Tier2 providers were talking about the idea of adjusting their BGP 
> > filters to accept prefixes smaller than a /24. A few were saying they thought about going down to as small as a /27. 
> > This was mainly due to more networks coming online and not having even a /24 of IPv4 space. The first argument is 
> > against this is the potential bloat the global routing table could have. Many folks have worked hard for years to 
> > summarize and such. others were saying they would do a /26 or bigger. 
> >
> > However, what do we do about the new networks which want to do BGP but only can get small allocations from someone 
> > (either a RIR or one of their upstreams)? 
> >
> > Just throwing that out there. Seems like an interesting discussion. 
> >
> >
> > Justin Wilson 
> > j2sw () mtin net 
> >
> > --- 
> > http://www.mtin.net Owner/CEO 
> > xISP Solutions- Consulting – Data Centers - Bandwidth 
> >
> > http://www.midwest-ix.com COO/Chairman 
> > Internet Exchange - Peering - Distributed Fabric