On 6/3/24 11:56, Jon Elson wrote:
I have several special-purpose devices based on machinekit on the Beagle
Bone.
In one case, we are using it in a hospital where they won't allow us to
connect anything to their network. So, we set up a point to point
Ethernet link between a laptop and the Beagle Bone. When starting
LinuxCNC, there is a HUGE delay of about 10 minutes before the Axis GUI
comes up. I think I have traced it to be caused by there being no NTP
time server. I think we see the same delay with either a Linux or
Windows computer used to access the Beagle.
Does this ring a bell with anyone? Is there a workaround? (Process to
kill or needs to be run?)
Thanks for any hints,
Jon
There are two solutions Jon. The latest crop of ntp offerings can be
both client and server. ntpsec is one of them, and more difficult to
setup but I have it running on this machine as both client and server,
so I am a stratum 3 server to the rest of my stuff. Means I'm within a
millisecond of the clock in Co Springs. Chrony can also do that and may
be easier to setup. Its relatively easy to do so I'm not banging on
debians pool of servers except for this machine. Using chrony on all my
pi clone stuff.
Bypassing it can I'm sure be done, but the proper thing would be for the
hospital to setup its own ntp server and allow your machine access since
there are things that cannot be well done if the system clock is wrong.
I'd not be bashful about presenting that argument to the hospitals net
controller. Its not that hard, even for a winders system, to cut a
single ipv4 address into their system. You could even restrict that
address to only the ntp port #. It should of course be a non-routable
address, someething in the 192.168.xxx.yyy range. Any solution I would
offer demands a net access. It is important enough that its non-negotiable.
Good luck
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Cheers, Gene Heskett, CET.
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