I had about 10 of these units suffer from the disconnect problem this morning.
Some were powered solely from DC wall plug directly to round connector. Some were powered solely from POE injector from included DC wall plug power supply. Some were actually powered by both direct DC round plug AND POE from the Ethernet/Ether1 port. So in essence I've ruled all of those combos out as individual immunity/culprits. Some of these were plugged in to small UPS units from APC or similar brand. Which I know don't do line conditioning, so that doesn't surprise me there. -----Original Message----- From: Af [mailto:[email protected]] On Behalf Of Adam Moffett Sent: Wednesday, August 23, 2017 11:56 AM To: [email protected] Subject: Re: [AFMUG] Brown-outs, Power fluctuations lock up Mikrotik CRS units We have at least 50 CRS and I've never seen that. We aren't using the wall warts though. These are almost all on Traco 48v power supplies plus a 48 to 24 converter. So I have a second layer of conversion between the device and the power. That's just an observation and I don't know that it ought to make a difference. ------ Original Message ------ From: "Sterling Jacobson" <[email protected]> To: "[email protected]" <[email protected]> Sent: 8/23/2017 1:39:43 PM Subject: [AFMUG] Brown-outs, Power fluctuations lock up Mikrotik CRS units >I get power glitches from time to time in our city and it never fails >to cause one or more of our CRS units to glitch. > >They appear powered and running, but SFP+ modules don't communicate >until a power cycle. > >Anyone else see this? > >And generally, I don't understand how variations in 110v AC get through >the DC power wart and cause problems to the CRS. > >I mean, shouldn't the conversion from AC to DC inherently clean up some >of the crap of the AC power? > >Or is this a function of the power dipping low enough for brief time, >that the DC also goes almost out then surges back? > >The CRS handles a wide range of DC input voltage, so I thought it would >be more immune to fluctuations of DC voltage too. > >Is that what is causing problems with the CRS maybe? > >
