nanog mailing list archives
Re: Mx204 alternative
From: Saku Ytti <saku () ytti fi>
Date: Mon, 2 Sep 2019 17:16:50 +0300
On Mon, 2 Sep 2019 at 16:26, Denys Fedoryshchenko <nuclearcat () nuclearcat com> wrote:
or some QFX, for example, Broadcom Tomahawk 32x100G switches only do line-rate with >= 250B packets according to datasheets.
Only is peculiar term here. 100Gbps is 148Mpps, give or take 100PPM, at 250B it's still some 50Mpps. Times 32 that's 1600Mpps, or 1.6Gpps. Only implies it's modest compared to some other solution, what is that solution? XEON doing ~nothing (not proper lookup even) is some couple hundred Mpps, far cry from 1.6Gpps with ACL, QoS and L3 lookup. I don't care about wire rate on chip with lot of ports, because statistics. 250B average size on 32x100GE on a chip is fine to me. 250B average size on 32x100GE with 32 chips, would be horrifying. I'm not saying XEON does not have application, I'm just saying XEON is bps and pps expensive chip compared to almost anything out there, however there are some application with very deep touch where it is marketable. Btw. technically Tomahawk and Trio are very different, Trio has tens or hundreds of cores executing software, cores happen to have domain specific instruction set, but still software box with lot of cores. Tomahawk is pipeline box, having domain specific hardware and largely not running a software (but all pipelines today are somewhat programmable anyhow). On Trio you are mostly just time limited on what you can do, on Tomahawk you have physical hardware restrictions on what you can do. -- ++ytti
Current thread:
- Re: Mx204 alternative, (continued)
- Re: Mx204 alternative Kenneth McRae via NANOG (Sep 02)
- Re: Mx204 alternative Kenneth McRae via NANOG (Sep 02)
- Re: Mx204 alternative Rob Foehl (Sep 03)
- Re: Mx204 alternative Mark Tinka (Sep 02)
- Re: Mx204 alternative Bjørn Mork (Sep 02)
- Re: Mx204 alternative Mark Tinka (Sep 02)
- Re: Mx204 alternative Saku Ytti (Sep 02)
- Re: Mx204 alternative Mark Tinka (Sep 02)
- Re: Mx204 alternative Baldur Norddahl (Sep 02)
- Re: Mx204 alternative Denys Fedoryshchenko (Sep 02)
- Re: Mx204 alternative Saku Ytti (Sep 02)
- Re: Mx204 alternative Denys Fedoryshchenko (Sep 02)
- Re: Mx204 alternative Saku Ytti (Sep 02)
- Re: Mx204 alternative Mark Tinka (Sep 02)
- Re: Mx204 alternative Brandon Martin (Sep 02)
- Re: Mx204 alternative Ross Tajvar (Sep 02)
- Re: Mx204 alternative Raymond Burkholder (Sep 02)
- Re: Mx204 alternative Saku Ytti (Sep 02)
- Re: Mx204 alternative Olivier Benghozi (Sep 02)
- RE: Mx204 alternative adamv0025 (Sep 02)
- Re: Mx204 alternative Saku Ytti (Sep 02)
- RE: Mx204 alternative adamv0025 (Sep 02)