Try different radios and/or system OS. You could run Mikrotik or Star OS
on the board for little money. If it is not a motherboard issue then I
think there is something that the OS or radios do not like specific to
that location.
Scriv
rabbtux rabbtux wrote:
All,
we have a 50' tower that had a soekris4511 board running a modified
version of pebble linux. The system worked great for nearly 2
years. We upgraded the system to a soekris 4521 and bridged both
pcmcia interfaces to have a 2 sector site. The 2 sector system works
great except for one problem: it randomly dies every 1-4 days and
never comes back! (until a tech goes on site and recycles power)
The lockup symptoms are as folows:
1) blinking link light at switch where eth0 is plugged in.
2) No response from any interface - wired or wireless.
3) System log is set to issue a "mark" line every 10 minutes, but
nothing is written during this lockup time.
The system has a working & tested watchdog timer.
What has been tried (not in this order):
1) cron job that pings wireless backhaul and does a reboot if no ping
answer for 10 min. (didn't ever run)
2) Thinking it might be a power problem we replaced power supplies.
3) Not trusting our POE ethernet cable, we used a second Cat5 cable
for DC power only. 4 wires were used for each line of the DC power,
which was plugged directly into the motherboard.
4) Added a ground rod & cable to improve tower grounding. (remember
though, this single sector system worked fine without this added
grounding)
5) swapped out the 4521 motherboard.
6) created a bench test system. This was an exact duplicate of the
tower system without external antennas, run on the bench.
wireless LT -> 2 sector system(backhaul link) - > wireless router ->
wired laptop
In this test system our test AP runs without any wired connections, as
it is in the field. We ran flat out repeated copy scripts for 3-4
days, and transferred approx 40G at about 3Mb/s (way more that actual
field conditions!).
Never saw test system lockup, its up time was always correct. This
actual 4521 mother board is now on the tower, and we still see the
problem.
Any suggestions??
Thank you kindly,
Marshall
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