I2C Failure and more

[CCIS]

WS-12-250-DC with 1.4.8rc7 installed July 7th with a simple config has been running perfectly until this morning.

This AM I found the switch sending these email alerts (about 40 of them between 1am and 8am)
"Low voltage warning (11.0V) - from RC-CBC Netonix (10.248.0.220)"

The switch is powered by 12v battery. The battery is full.

The switch appears with a red ball in the Netonix Manager with the status "Invalid username or password"
The username and password is correct tho, its been reporting fine since it was installed.

The log (attached) is filled with this:

Aug 7 16:27:12 switch[934]: retrying i2c link to power supply
Aug 7 16:27:15 switch[934]: retrying i2c link to power supply
Aug 7 16:27:18 switch[934]: retrying i2c link to power supply
Aug 7 16:27:18 dropbear[1173]: bad password attempt for 'admin' from ::ffff:66.244.241.105:52447
Aug 7 16:27:19 dropbear[1173]: Exit before auth (user 'admin', 1 fails): Disconnect received
Aug 7 16:27:21 switch[934]: retrying i2c link to power supply
Aug 7 16:27:24 switch[934]: retrying i2c link to power supply
Aug 7 16:27:27 switch[934]: retrying i2c link to power supply
Aug 7 16:27:28 dropbear[1197]: bad password attempt for 'admin' from ::ffff:66.244.241.105:52526
Aug 7 16:27:29 dropbear[1197]: Exit before auth (user 'admin', 1 fails): Disconnect received

Is there anything I should do before rebooting?
This is a remote switch.

[CCIS]

I should add the switch is passing traffic and powering 4 Miktotik APs right now

[sirhc]

Power cycle the switch (10 seconds no power), if that does not solve the problem then you need to RMA it because it is either failed or damaged.

[CCIS]

Visited the site today, found a bad power connection for this switch near our fuse block. A connector had come apart on us and there was no more than a pins head size of contact area on 12v positive line in ..

Chris, your switches seem to work better when we don't brown them out :)

All good here.

[bchur83]

I had this exact same thing happen on Friday last week and again last night. The switch appeared to reboot itself due to a low power issue but the batteries (24V) were fully charged. I have the switch set to email me if the power drops below 25v on the battery and I didn't get any notifications. After booting back up it shows these same i2c messages in my log and the power supply readings all show ERROR. Now today it apparently has fixed itself and looks normal. It has done this 2 times now in a weeks time, I am a bit concerned the switch could be failing. It has been in service for about a year now running great until these errors.

[sirhc]

I had this exact same thing happen on Friday last week and again last night. The switch appeared to reboot itself due to a low power issue but the batteries (24V) were fully charged. I have the switch set to email me if the power drops below 25v on the battery and I didn't get any notifications. After booting back up it shows these same i2c messages in my log and the power supply readings all show ERROR. Now today it apparently has fixed itself and looks normal. It has done this 2 times now in a weeks time, I am a bit concerned the switch could be failing. It has been in service for about a year now running great until these errors.

What mode switch?

What version firmware?
"ANY" DC SMART switch should be running v1.4.8rc7

Is the switch connected directly to the batteries or a power supply?
Why people buy our SMART DC switches and hook to a power supply I will never know as this is a bad idea.
If you plan to be able run the batteries down to 9V and are using peaks of 250W then you need 30+ Amp fuse.
Remember the lower the input voltage the higher Amp fuse you need.
150W / 9V = 16.7 Amp inline fuse/breaker -> WS-8-150-DC
250W / 9V = 27.8 Amp inline fuse/breaker -> WS-12-250-DC
500W / 9V = 55.6 Amp inline fuse.breaker -> WS-26-500-DC

What gauge wire and how long between the batteries and the switch?
I would use no less than 12 AWG if less than 3' long and 10 AWG if longer.
If you are using the WS-26-500-DC I would only use 10 AWG wire.

Always put a fuse/breaker on one of the DC power lines.
It is recommended to use a breaker because if you spark the wires connecting up the switch you can damage the switch and or erase the flash.
https://www.google.com/search?q=dc+brea ... 20&bih=950

Make sure all connectors are corrosion free and good.