I bought a DGS-1224T FW-D for a client and put it in, setting the ip for 192.168.0.2. He has a DLink Router using .1 and his server is set for .5. (Don't look at me, I didn't put it in.)
Everything was fine, all the lights were on and I could address the unit, changed the PW and set the IP number, etc. and everything was cool.
For a day.
Then I get this call to come in and look at it: one ports light was on, the Power LED and the CPU LED was blinking. Couldn't PING the unit, couldn't access it through IE, so I called DLink TS, they said it was defective, ship it back.
To avoid downtime for the client, I ordered in another, put it in today, WITHOUT HAVING ALTERED ANYTHING and again, only the power and CPU lights are on. Everything works, so the clients don't even know there's a problem, but this is RIGHT OUT OF THE BOX! I brought the old switch back to my shop, plugged stuff in to it and it works like a champ, all the lights are on, I can address it...What tha.....


?
What POSSIBLE scenario could cause this?