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Have a WS-26-400-IDC, board revision B, that has been rebooting 2-3 times per month, taking all devices with it.

Firmware is 1.5 since July, 1.5rc4 before that (don't remember when I put that on there).

Cabinet is climate controlled, Temps are 42, 52, 47, 61 (Board, CPU, PHY, PHY).

Rectifier is 1500W. Batteries are something close to 100AH.

Load on the switch is stable between 110-130W.

Our upstream provider has a Cienna switch also on the -48v plant and is not affected (eliminating the rectifier & batteries as being the problem).

Anything specific I can check before we order a replacement?

Thanks!

If you run a large flat network try disabling Discovery TAB under the Device/Configuration TAB under the Discovery section.

Are you saying you are powering the switch with a power supply or hooked directly to the battery bank. They are designed to hook to batteries not a power supply.

I suppose it could be a bad unit, you could easily determine this by swapping it out with a spare unit. If the spare unit does the same thing then you look deeper if it does not then you RMA the unit.


Also poor grounding can damage units and cause reboots. Make sure electrical service grounds are bonded to tower grounds otherwise all that ground current going through the switch can not only damage it but if not enough to damage it can cause weird things to occur.

I'll disable discovery, but that would be a software issue / crash / reboot, wouldn't it? If this is the same reboot as done during a firmware update, where connected devices do not lose power, then my issue is different since they are losing power.

Grounding is correct, though I will have our field tech double-check to be sure.

As for the power, how do you envision the batteries getting charged? Gotta have a rectifier/charger/power supply for that.

We are considering going with an external 300W isolated power supply and switching to the WS-12-DC units. So much work to get a DC switch to work on a DC power plant.

Thanks for the reply!

At my DC towers:
Switch hooks directly to the battery bank. *with inline breaker or fuse*
Charger hooks directly to battery bank. *separately*

Switch draws batteries down charger kicks on charges batteries up charger kicks off.

You should be using decent AGM batteries which are designed for this endless cycle of charge and discharge.

You could have a bad unit, this is where you swap out a spare and see if the problem remains or goes away.

A lot of times people point the finger at the wrong device, read this recent post: viewtopic.php?f=17&t=3623&start=10#p26617