On Thu, Apr 28, 2016 at 1:33 AM, lincoln dale <l...@interlink.com.au> wrote:
> On Wed, Apr 27, 2016 at 4:41 PM, Peter Kranz <pkr...@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.
