It could be related to the 13.x FPGA memory controller bug, but I
haven't seen this specific problem on dozens of APs. I definitely know
the memory bug when I see it because stupid things start happening and
the AP has to be rebooted. But the AP becoming completely unresponsive
while the ethernet statistics all look fine is not one of them. Anything
is possible though.
If it happens again even on 14.1.2, I would try to bounce the ethernet
link and see if that does anything. I have seen a lot of that especially
with MikroTik + Canopy. Fairly frequent with P9 and P10 FSK APs. Chuck's
surge suppressors seem to add to the problem, but I can live with that.
Also, I know that I'm getting about 20 volts at the radios on a couple
clusters that are on ~300 feet of cable, SyncInjector fed by a 24v
regulated power supply with the pot set at 25 volts (due to UBNT radios
on shorter runs). The 450 APs seem to handle it fine.
On 7/6/2016 8:15 PM, Rhys Cuff (Latrobe I.T) wrote:
I’d also make sure you have enough power getting up the cable to drive it.
*From:*Af [mailto:[email protected]] *On Behalf Of *Ken Hohhof
*Sent:* Thursday, July 7, 2016 9:34 AM
*To:* [email protected]
*Subject:* Re: [AFMUG] 450 AP intermittently nonresponsive,doesn't
happen if no SM sessions
OK, I just upgraded the AP to 14.1.2 and so far, so good. SMs next.
*From:*Sean Heskett <mailto:[email protected]>
*Sent:*Wednesday, July 06, 2016 5:08 PM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 450 AP intermittently nonresponsive, doesn't
happen if no SM sessions
i would upgrade the AP and all SMs to 14.1.2 (it's a very stable release)
if it exhibits these issues once SMs start to register are you sure
that you are not somehow creating a network loop through an SM, or
some client is launching a DDoS and the subject of a DDoS attack?
On Wed, Jul 6, 2016 at 3:51 PM, Ken Hohhof <[email protected]
<mailto:[email protected]>> wrote:
Does this sound like any kind of a known issue?
I have a 450 AP that has been in service for about a year that has
started intermittently becoming nonresponsive from the Ethernet side
(can't access GUI, doesn't pass traffic). I thought Ethernet problem,
but neither the AP nor the switch shows any errors or events. It is
more like the CPU is going to sleep or something, but the Ethernet
chip is still active. I don't see anything in the Event Log though.
We missed applying the Lite to Full license key on this AP and I
thought maybe that was the problem since it was at 10 SMs, but I
applied the license key and still see the problem.
The weird thing is, if I set the Freq to None, or set the color code
to something we don't use, the AP doesn't seem to exhibit the
problem. Only once SMs start registering.
I'm thinking it's maybe a power starvation issue, that the AP uses
more power when actively talking to SMs, and maybe it's not getting
enough voltage.
But I also see the firmware is still on 13.2.1.3, and I see Cambium
finally released 14.1.2 official. I am hesitant to upgrade the
firmware though, unless there is some reason to believe what I am
seeing is a firmware bug. Otherwise I am just adding to the confusion.
