I don't know this machine but perhaps it is normal behavior that in absence of an uplink the machine reboots. I've had headless machines with a watchdog set to reboot when the network seems down, as a missing link is unlikely while a wedged OS might happen. Usually the watchdog has a hardware portion (look at the BIOS) and when such hardware is detected, an OS task is started. When the server is ok, but you disconnect the cable, does it reboot as well ?
I would look at the ethernet settings in the server and make sure that the MTU is set to the standard 1500-byte frame size. If it is, I'd try setting the card to fast-ethernet speed 100Mbps duplex, and see what happens. If the switch is manageable, I'd look at the queuing policy on ports. If the switch has to connect 100Mbps and 1000Mbps ports there is a chance its buffers fill up and then it locks up. Perhaps the cause is in the power feed. I've had routers or other embedded devices wedge at random due to issues with mains power. Once I cured a router from locking up simply by adding a 2-meter extension cord between the Ac adapter and the wall plug... Also, I'd try changing / swapping the ethernet cables and ports used in the switch and see if something changes. One last thing I'd try is to run something like Ubuntu Live CD on the server and try stress-testing. If the problem is with the OS, Linux will react differently -worse or better- and this could bring some light to the issue. That's all I can think of now. Good luck. -- epoch1970 Daily dose delivered by: 3 SB Classic, 1 SB Boom iPeng (iPhone + iPad) Squeezebox Server 7.6 (Debian 5.0) with plugins: MusicIP Server Power Control by Gordon Harris WeatherTime by Martin Rehfeld IRBlaster by Gwendesign (Felix) Find cover art by bpa BBC iPlayer, SwitchPlayer by Triode PowerSave by Jason Holtzapple TrackStat, Song Info, Song Lyrics by Erland Isaksson SaverSwitcher, ContextMenu by Peter Watkins. ------------------------------------------------------------------------ epoch1970's Profile: http://forums.slimdevices.com/member.php?userid=16711 View this thread: http://forums.slimdevices.com/showthread.php?t=90127
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