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?
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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.