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Re: Juniper hardware recommendation


From: Saku Ytti <saku () ytti fi>
Date: Mon, 17 May 2021 10:34:19 +0300

On Mon, 17 May 2021 at 00:22, Sander Steffann <sander () steffann nl> wrote:

How do you normalise? Use L2 or L3 octets stats, and use the number of
packets to calculate the L2 and/or L1 overhead the stats are missing?
Or do you have a better way?

That's the way one of my employers did it, and I can't think of a better way.

bytes += PPS*overhead

Overhead is likely 20bytes (preamble, SFD, ifg). But it could also be
24B (FCS/CRC might be missing in what otherwise is claimed to be L2).
You may need a lab to confirm what exactly is being counted.

This adjustment could be in DB or it could be render-time, both have
pro and con.

-- 
  ++ytti


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