AW: /27 the new /24

[Jürgen Jaritsch <jj () anexia at>]

Welcome to the real world ...

Cisco SUP720-3BXL
Cisco RSP720-3BXL

and even the new and shiny SUP2T only supports 1 Mio routes (dicvided to IPv4 MPLS, IPv4 VRF, IPv4 global routes, etc).

I guess this is still the truth: there are at least a few ten thousand of these devices running big parts of the 
internet. Take a look at some big players network - e.g. Level3. Their customer access routers in Slovakia, Austria and 
Germany are still based on the Cisco 6500/7600 platform.

Of course there are many other vendors and platforms available which do NOT have this limitations. But there are also 
at least a ton of vendors on the market with exactly the same limitation :(.


best regards


Jürgen Jaritsch
Head of Network & Infrastructure

ANEXIA Internetdienstleistungs GmbH

Telefon: +43-5-0556-300
Telefax: +43-5-0556-500

E-Mail: JJaritsch () anexia-it com 
Web: http://www.anexia-it.com 

Anschrift Hauptsitz Klagenfurt: Feldkirchnerstraße 140, 9020 Klagenfurt
Geschäftsführer: Alexander Windbichler
Firmenbuch: FN 289918a | Gerichtsstand: Klagenfurt | UID-Nummer: AT U63216601


-----Ursprüngliche Nachricht-----
Von: NANOG [mailto:nanog-bounces () nanog org] Im Auftrag von Mike Hammett
Gesendet: Freitag, 02. Oktober 2015 17:51
Cc: NANOG
Betreff: Re: /27 the new /24

How many routers out there have this limitation? A $100 router I bought ten years ago could manage many full tables. If 
someone's network can't match that today, should I really have any pity for them? 




----- 
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: "Mike Hammett" <nanog () ics-il net> 
Cc: "NANOG" <nanog () nanog org> 
Sent: Friday, October 2, 2015 10:48:29 AM 
Subject: Re: /27 the new /24 

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