Arista Routing Solutions

Saku Ytti saku at
Sun Apr 24 15:02:57 UTC 2016

On 24 April 2016 at 05:14, Keith Medcalf <kmedcalf at> wrote:

> High Touch / Low Touch

High touch means very general purpose NPU, with off-chip memory. Low
touch means usually ASIC or otherwise simplified pipeline and on-chip
memory. Granted Jericho can support off-chip memory too.

L3 switches are canonical example of low touch. EZchip, Trio, Solar,
FP3 etc are examples of canonical high touch NPUs. What low touch can
do, it can do fast and economically.

But like few terms, it's not exact, and borders are hazy and even subjective.


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