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Just received my WS-10-250-AC and started configuring it. One thing I noticed is that it is running pretty hot even without a load or traffic. The CPU temperature ranges between 50C - 60C with ambient temperature ~70F/21C. The fan cycles on and off every 8 minutes.
Is this normal?
What is the most efficient mounting position? Mounted to the wall, ports down?

The switch core (CPU/PHY) are rated to 125C your switch is not running hot.

Where is the fan on the WS-10-250-AC and which direction does the air flow? If wall mounting, I prefer to mount kit so that the air inlet is at the bottom and the air outlet is at the top so long as I can still have clear view of the ports.

lligetfa wrote:Where is the fan on the WS-10-250-AC and which direction does the air flow? If wall mounting, I prefer to mount kit so that the air inlet is at the bottom and the air outlet is at the top so long as I can still have clear view of the ports.

Looking at the front (ports) of the switch, the fan is on the left and blows out. The inlet(s) are on the right, rear and top.

In that case I would mount it so the fan is on top blowing upward provided of course that it does not impede access to the ports.

Personally I have mounted them with the ports facing up and down depending on the need.

It would just be best not to have the fan blowing down as this would go against the nature of heat rising.

sirhc wrote:Personally I have mounted them with the ports facing up...

I try to avoid having them face up and fill with dirt. I had an installer one time let PVC sawdust get inside a port.

lligetfa wrote:

sirhc wrote:Personally I have mounted them with the ports facing up...

I try to avoid having them face up and fill with dirt. I had an installer one time let PVC sawdust get inside a port.

That is true Les but sometimes life deals you a situation where you have to.

This is were those nice rubber plugs would be handy, I should check into buying them in bulk from China and offering them to people at a decent price.

sirhc wrote:The switch core (CPU/PHY) are rated to 125C your switch is not running hot.

What happens when temp reaches or exceeds 125C? I have a WS-6-MINI that is mounted in an attic. Yesterday afternoon when it was 87F outside, the switch did something very strange. 1 of the ports shut down completely (the POE IN port) but power stayed on to the switch, just no Ethernet link. A 48V port turned off, another 48V stayed on and passed traffic and a 24V port stayed on and passed traffic.

After bout 30 minutes of this behavior, it looked like it reboot and came back to life normally.

I know an attic space is not ideal for a mounting location but I figured it couldn't be worse that putting a WS-6-MINI in that small plastic enclosure with no air flow and attaching it to a tower.

Right now, at 81F outside, the board is 73C, CPU is 99C and the PHY is 103C.

cwachs wrote:I know an attic space is not ideal for a mounting location but I figured it couldn't be worse that putting a WS-6-MINI in that small plastic enclosure with no air flow and attaching it to a tower...

I think a small grey plastic enclosure would be much less of a solar collector than a large roof surface.