[time-nuts] Designing an embedded precision GPS time server

Denny Page denny at cococafe.com
Sun Oct 29 17:38:40 UTC 2017

Back to back with 100Mb is good, particularly for latency tests, but you’ll need a switch for general testing. FWIW, an otherwise idle switch generally has very consistent latency, and if both ports are at 100Mb, it is symmetric. Also, with any kind of managed switch you can easily monitor traffic via a tap or span (mirror) port.

Alternatively you could use an hub (yes, a hub!). I have one that I keep for very special occasions. :)


> On Oct 29, 2017, at 09:12, Nick Sayer via time-nuts <time-nuts at febo.com> wrote:
> I don’t have the wherewithal to try and gauge the timing of switches, and of course the function of switches makes monitoring unicast traffic by third parties “impossible” (yes, you can play games with the switch table, but that’s more trouble than it’s worth).

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