Re: Arista 7280QR-C36 Viability

[Pedro Prado via NANOG <nanog () lists nanog org>]

FIB compression makes it go over the ASIC’s official limit - as far as I know the 1M+ is from the ASIC’s spec

Pedro Martins Prado
pedro.prado () gmail com / +353 83 036 1875

> On 4 Dec 2025, at 13:58, Mike Hammett via NANOG <nanog () lists nanog org> wrote:
>
> Is FIB compression accounted for in their "over 1M" routes claim, or is that on top of the spec?
>
>
>
> -----
> Mike Hammett
> Intelligent Computing Solutions
> http://www.ics-il.com <http://www.ics-il.com/>
>
> Midwest-IX
> http://www.midwest-ix.com <http://www.midwest-ix.com/>
>
> ----- Original Message -----
> From: "Jon Lewis" <jlewis () lewis org <mailto:jlewis () lewis org>>
> To: nanog () lists nanog org <mailto:nanog () lists nanog org>
> Cc: nanog () lists nanog org <mailto:nanog () lists nanog org>, "Mike Hammett" <nanog () ics-il net <mailto:nanog () 
> ics-il net>>
> Sent: Wednesday, December 3, 2025 7:40:34 PM
> Subject: Re: Arista 7280QR-C36 Viability
>
>
> > On Dec 1, 2025, at 8:57 AM, Mike Hammett via NANOG <nanog () lists nanog org> wrote:
> >
> > At the risk of the Streisand effect, what am I missing about the Arista 7280QR-C36? It looks like a great router 
> > for small ISPs (great price, large packet buffers, good port selection, meaningful hardware routes). That said, it 
> > looks to be right on the border of DFZ viability. It supports "over 1M" routes, but I currently have about 1,036,824 
> > in my route table. How much over is "over"? What happens in EOS when it goes over?
>
> If you let it run out of FIB space, those routes that don’t make it into the FIB blackhole.  FIB compression works 
> quite well though, especially if you enable it. :)
>
>
>
>
>
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