David Lord wrote:
A C wrote:
On 8/20/2011 17:41, David Lord wrote:
My config for NetBSD-5.1 on i386:
# GPS Sure serial tty00 /dev/gps2
server 127.127.20.2 mode 18 prefer
fudge 127.127.20.2 time2 0.350 refid GPSb
server 127.127.22.2
fudge 127.127.22.2 flag2 0 flag3 1 refid PPSb
The Sure output is at a higher baud rate than default hence the
use of 'mode 18'.
offset
*GPS_NMEA(2) GPSb 0 377 -80.444 6.309
oPPS(2) PPSb 0 377 -0.013 0.004
Offset is normally lower than above but peaks at 25-30us when
system is under heavy load.
I've reconfigured like yours and tried it, too (with the addition of a
minpoll to speed up the GPS):
server 127.127.20.1 minpoll 4 mode 1 prefer
fudge 127.127.20.1 time2 0.245 refid GPS
server 127.127.22.1
fudge 127.127.22.1 flag2 0 flag3 1 refid PPS
I went back through ntp.conf files from 2009 to date and see
that I used "fudge 127.127.22.1 flag3 1" for just under half
of them. I can't remember there being any advantage in using
either setting.
David
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