[En-Nut-Discussion] ethernet connection down

Peter Gaskell pgaskell at darkwing.uoregon.edu
Thu Feb 3 23:53:41 CET 2005

I am running an ethernut 2.1B connected to the internet with a static 
IP.  I have also tried an ethernut 2.0A and this seems to exhibit the 
same behavior. We access the webserver periodically every minute to get 
data posted on the webpage.  The httpd and telnet threads we are 
running are pretty much copied from example code.  After several hours 
of normal operations (4 to 6 usually), the ethernut is no longer 
accessible over the network.  All the LEDs are showing activity, but 
any incoming connection will time out, no ping etc.  I set up a serial 
port thread to check the threads with nutThreadList; all are listed as 
OK and appear normal.  The NutHeapAvailable is around 18k.  I can then 
reboot over the serial port (or by power cycling) and the ethernut will 
be available again over telnet and http.  This problem is periodic, but 
it takes several hours to crash, and not everything crashes, so the 
watchdog timer is of no use.

Has anyone seen this problem?  Does anyone have any suggestions on 
methods to figure out what is going on here?


Peter Gaskell
University of Oregon
Oregon Center for Optics
pgaskell at darkwing.uoregon.edu
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