[188998] in North American Network Operators' Group
Re: Arista Routing Solutions
daemon@ATHENA.MIT.EDU (Ryan Woolley)
Thu Apr 28 22:21:17 2016
X-Original-To: nanog@nanog.org
In-Reply-To: <CAAUJCVN=XEnQRe60q5-zx9kt0CrRQA_TWTAFr-_5mHu+e=+aPw@mail.gmail.com>
Date: Thu, 28 Apr 2016 22:21:13 -0400
From: Ryan Woolley <rwoolleynanog@gmail.com>
To: Peter Kranz <pkranz@unwiredltd.com>, nanog list <nanog@nanog.org>,
lincoln dale <ltd@interlink.com.au>
Errors-To: nanog-bounces@nanog.org
On Thu, Apr 28, 2016 at 1:33 AM, lincoln dale <ltd@interlink.com.au> wrote:
> On Wed, Apr 27, 2016 at 4:41 PM, Peter Kranz <pkranz@unwiredltd.com>
> wrote:
>
>> Curious if you have any thoughts on the longevity of the 7500R
>> and 7280R survival's with IPv4 full tables? How full are you seeing the
>> TCAM getting today (I'm assuming they are doing some form of selective
>> download)? And if we are currently adding 100k/routes a year, how much
>> longer will it last?
>
> [...]
>
> One could ask Geoff Huston where he thinks combined IPv4+v6 will exceed 1M
> entries but I would expect it to be many years away based on
> http://bgp.potaroo.net/ and we'd welcome discussions about if it you want
> to know our opinion [*] on how we're doing it will scale. What we're doing
> doesn't explode at 1M, there's headroom in it hence why we say "1M+". Again
> we're happy to talk about it, just ask your friendly arista person and if
> you don't know who to ask, ask me and i'll put you in touch with the right
> folks.
>
Peter, I'd point you to https://labs.apnic.net/?p=767 for more historical
detail and a table with some (recent) predictions. The summary is that the
rate is mostly linear at around 10% per year and even 1MM routes lasts
quite comfortably beyond 5 years at the current growth rate. I am not
particularly worried about the table growth rate (or Moore's law) changing
dramatically.
With respect to the utilization of the hardware, our setup is basically the
same as Lincoln's scenario #1 and so utilization looks about the same, on
both platforms.
