Testing ntpd and/or timing from gpsd

[Gary E. Miller]

Yo Hal!

On Thu, 12 May 2016 14:23:43 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> > I turn off the EEE in my switches.  EEE can cause me troubles.  
> 
> I haven't seen any problems, but maybe I haven't looked in the right
> place.
> 
> My switches aren't smart enough to have the disable option (or any
> other options).

It would be insane for a switch to have EEE enabled without a way to
turn it off, so you likely have never seen it turned on.

I can enable autonegotiation for EEE it on some of my switches, nothing
but trouble.

If your backbone is GigE then it is likely way better than you think.
Turn on PTP and your hosts will time link closer than you have ever
seen, if it works at all.  Hardware timestamping of the ethernet packets
works well, when it works at all.

PTP shows that the main problem with high accuracty NTP is the network
stack and the OS, not the network itself.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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