Troubleshoot 3COM 3001 NBX ip_unknown problem
Posted on 2011-03-22
Hello my friends...
Things are getting pretty desperate here...
My 3001 NBX from 3com (R6_5_20) has been working perfectly for months... Now it works for more or less an hour and then all the phones in the branch offices (one connected in wi-fi, 1 km distance and others using adsl and vpn) go to ip_unknown and stop working. Phones in central office never stop working, anyway.
If I reset the nbx everything starts to work again but then after more or less an hour they're dead again. Even when I have the problem I'm able to ping branch offices and use applications without problems so it must be something related to the nbx or the astaro security gateway 7 that connects the wi fi bridge and lets vpn client reach our network. I just do not have diagnostic clues because from a "normal network" point of view the situation's normal.
Any hints about what I could do to find and solve the problem?