Unfortunately, we have our own set of customized tools used to manage the network and each AP, so the ability to switch OS will not help.  Someone has suggested a serial cable and logging the console activity.  still trying to figure out the logistics.

On 4/6/06, John Scrivner <[EMAIL PROTECTED]> wrote:
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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