On 4/6/25 3:11 AM, Tim wrote:
Tim:
Your cause could be external.  Someone bumping a cable, loose power
socket to a network switch, failing network switch, network switch not
liking glitches on the mains, cleaning unplugging something to plug
their vacuum into.

ToddAndMargo:

Is everything on the UPS, computer and hub?

Server, monitor, hub, firewall, microwave modem.
Nothing else.

I'd also check all plugs and sockets are firm.

I was the one that did that.  They are all in tight.

The hub is getting long the tooth.  Maybe I should have that replaced
too.

What do you think of this one?
https://www.trendnet.com/products/gigabit-switch/24-port-gigabit-desktop-switch-TEG-S25D

Sorry, unfamiliar with it.

I've had to replace network switches a few times when they spanned
between buildings.  You could see the LEDs on one of the ports madly
blinking when it got damaged (see: "flapping").  Power cycling it would
reset things back to normal, but over time failures became permanent.

This hub is over 11 yeas old.  I never was happy with it to start with.


Outside network cabling is vulnerable to things like somewhat-near
lighting, and wind blowing over it causing hight static electricity
voltages.  And you can have mains wiring problems between buildings,
within a building, or even within a room (if it spans a phase) cause
problems with equipment joined together by network cabling.

Outside cabling does not affect the internal network.  I
am able to RDP and AnyDesk into all the workstations
when this happens

--
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