There was a issue with 450’s rebooting in cold weather that was addressed in recent software versions. If you are not running current software I would start looking at the release notes to figure out where you need to be.
The issue I believe was traced to a hard to locate instability in the internal logic power supply when the CPU load changed that manifested only under low temperatures. Cambium was able to reproduce it reliably in extreme cold testing (like -40C) but it was still a very difficult item to track down. Mark Radabaugh Amplex 22690 Pemberville Rd Luckey, OH 43443 419-837-5015 x1021 419-261-5996 (cell) m...@amplex.net > On Dec 19, 2016, at 11:19 AM, Ken Hohhof <af...@kwisp.com> wrote: > > Have you checked the AP log to make sure it isn’t doing watchdog resets or > something? There have been a couple temperature related problems on 450. > One was the ADI Communication Failure problem, AFAIK that was only SMs. Also > there’s the memory controller issue, I think that’s at high temperatures > though, just the same I would make sure you are at 14.1.2 or higher FW > version. > > Some people have reported water intrusion on 450 APs. I guess if it has > water in the bottom which froze, that could do bad things. You say that you > swapped cables though, so apparently the RJ45 isn’t frozen into a block of > ice. > > You really should have a spare AP on hand. If nothing else, you could buy a > Lite AP, and buy an upgrade key if you actually use it and need >10 subs. I > hate buying APs used, you don’t know its history, and you can’t RMA it. > It’s like a refurb laptop, you don’t know why the first buyer returned it to > the store, did they just not like it, or did it have an intermittent defect? > > <> > From: Af [mailto:af-boun...@afmug.com <mailto:af-boun...@afmug.com>] On > Behalf Of Kurt Fankhauser > Sent: Monday, December 19, 2016 10:04 AM > To: af@afmug.com <mailto:af@afmug.com> > Subject: Re: [AFMUG] 450 AP dropping Ethernet in cold weather > > new AP is on order, if I recall I think that this unit showing problems was > purchased on EBAY so I am wondering if there was a reason this unit was on > Ebay in the first place. > > On Mon, Dec 19, 2016 at 10:59 AM, That One Guy /sarcasm > <thatoneguyst...@gmail.com <mailto:thatoneguyst...@gmail.com>> wrote: >> wrap the whole radio and antenna in aluminum foil to keep the heat in. >> >> seriously though, do you give subscribers any access to the units? If so, I >> wonder if having them run a bunch of link speedtests could generate enough >> processing to warm the unit >> >> On Mon, Dec 19, 2016 at 9:54 AM, Kurt Fankhauser <lists.wavel...@gmail.com >> <mailto:lists.wavel...@gmail.com>> wrote: >>> Seems that the colder it is the more frequent the flapping is. I doubt its >>> the RJ45 ends since I tried a different cable run on the tower and still >>> showing the same issue. >>> >>> On Mon, Dec 19, 2016 at 10:42 AM, George Skorup <geo...@cbcast.com >>> <mailto:geo...@cbcast.com>> wrote: >>>> I would try new RJ45s on both ends. If that's not it, then swap it and RMA >>>> if it's still under warranty. >>>> >>>> >>>> On 12/19/2016 9:35 AM, Kurt Fankhauser wrote: >>>>> I have a 3.65ghz 450 AP that was running flawless for over 6 months until >>>>> we got our first really cold spell last week, temps dropped to near 0 >>>>> degrees a couple nights back to back and when I woke up one morning the >>>>> AP was dropping offline. Logged into the Mikrotik 2011 and it showed >>>>> Ethernet was flapping. (was originally going through a Sync Injector). I >>>>> had an old FSK AP going through the same sync injector and wasn't showing >>>>> any problems. I tried switching the ports on the sync injector, changed >>>>> ports on RB2011, eliminated sync injector and used a standard Canopy SM >>>>> power supply. Finally I even switched the known good Ethernet cable from >>>>> the FSK AP to the 450 and the port is still flapping. Won't lock to >>>>> 10-baseT either. I am thinking at this point that I am going to have to >>>>> replace the AP. >>>> >>> >>> >> >> >> >> >> -- >> If you only see yourself as part of the team but you don't see your team as >> part of yourself you have already failed as part of the team.
