I believe the routerboard watchdogs are hardware. The software resets the hardware timer. If it hits 0 the watchdog reboots.
On 12/20/09, Greg Ihnen <os10ru...@gmail.com> wrote: > A hardware watchdog timer isn't something that's "supported". To me that > sounds like a software feature. A true hardware watchdog is a separate > circuit that oversees the system. If it detects a problem it toggle the > power controller chip to reset the whole board. > > Greg > On Dec 20, 2009, at 2:19 PM, Tom Sharples wrote: > >> That's good - but just because it's supported at the chipset level doesn't >> >> necessarily mean the ubnt firmware or sdk supports it. In any case we >> were >> working with the original a/g nano's and bullets, not the M series. The M >> is >> way too new and bleeding edge for us. >> >> Tom S. >> >> ----- Original Message ----- >> From: "Michael Baird" <m...@tc3net.com> >> To: "Tom Sharples" <tsharp...@qorvus.com>; "WISPA General List" >> <wireless@wispa.org> >> Sent: Sunday, December 20, 2009 11:02 AM >> Subject: Re: [WISPA] Ubiquiti ready for prime time? >> >> >>> Tom, >>> >>> Try again, Ubiquity AR71xx based stuff (all the M series) supports a >>> hardware watchdog fine. >>> >>> from dmesg via OpenWRT. >>> Atheros AR71xx hardware watchdog driver version 0.1.0 >>> >>> Regards >>> Michael Baird >>> >>>> A hardware watchdog timer, typically, watches only one thing - is the >>>> software and/or CPU still alive? If a software pinger fails to reset a >>>> hardware counter or timer every few seconds or so, the timer reaches the >>>> >>>> end >>>> of its count and resets the motherboard. It is a failsafe if everything >>>> else >>>> goes wrong - something that happens more often than one would like when >>>> you're using developmental drivers. Software watchdogs are a poor >>>> substitute >>>> for obvious reasons - if the software or CPU is completely hung, the >>>> software watchdog won't work either! >>>> >>>> Tom S. >>>> >>>> ----- Original Message ----- >>>> From: "Mark Stephenson" <m...@countryconnections.net> >>>> To: "WISPA General List" <wireless@wispa.org> >>>> Sent: Sunday, December 20, 2009 4:12 AM >>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>> >>>> >>>> >>>>> Tom, >>>>> >>>>> Do you happen to know what a hardware watchdog timer watches? Perhaps >>>>> there >>>>> is something it can watch like whether or not the device is sending on >>>>> the >>>>> Ethernet port or the program counter. But, it seems that as embedded >>>>> systems >>>>> add more software, a useful hardware watchdog timer becomes less >>>>> possible >>>>> because there are more things that can go wrong and it is >>>>> difficult/expensive to make the hardware capable of checking those >>>>> things. >>>>> >>>>> Thanks, Mark >>>>> >>>>> >>>>> On 12/20/09 2:01 AM, "Tom Sharples" <tsharp...@qorvus.com> wrote: >>>>> >>>>> >>>>>> A software watchdog timer is not the same thing as a hardware watchdog >>>>>> timer. >>>>>> And SNMP has nothing to do with either. >>>>>> >>>>>> Tom S. >>>>>> >>>>>> ----- Original Message ----- >>>>>> From: jai...@budget.net >>>>>> To: Tom Sharples ; WISPA General List >>>>>> Sent: Saturday, December 19, 2009 9:03 PM >>>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>>> >>>>>> >>>>>> Please don't take me wrong on this but your statement (b) bothers me. >>>>>> You >>>>>> are either running a very old version of Air OS or you have no clue >>>>>> what >>>>>> your >>>>>> talking about. UBNT has support for SNMP which I use to monitor not >>>>>> only >>>>>> uptime but signal strength and a few other key items check out ZenOss >>>>>> if >>>>>> you >>>>>> need to watch these devices or any other network device for that >>>>>> matter. >>>>>> AirOS >>>>>> also has a "Watchdog timer" in the software that will automatically >>>>>> reboot a >>>>>> device that fails a ping time you set. I have never had to power cycle >>>>>> >>>>>> a >>>>>> UBNT >>>>>> device. In fact I had to reboot a Mikrotik router because it had a >>>>>> locked >>>>>> process in the packet sniffer application that drove the CPU to 100% >>>>>> so >>>>>> the >>>>>> UBNT gear has a higher uptime than the core router. >>>>>> >>>>>> Jaimie >>>>>> >>>>>> >>>>>> On Sat 12/19/09 12:24 PM , "Tom Sharples" tsharp...@qorvus.com sent: >>>>>> >>>>>> My biggest concern with these units is (a) lack of mechanical >>>>>> robustness - >>>>>> little plastic bits leak or break off quite easily and (b) lack of >>>>>> a >>>>>> hardware watchdog timer which personally I think is essential esp. >>>>>> when >>>>>> you're using "development stage" firmware. We did most of the work >>>>>> to >>>>>> port >>>>>> our Qcode to run on the ubnt platform, but have decided to shelf >>>>>> that >>>>>> project for another year, waiting for things to really settle down. >>>>>> In the >>>>>> CCTV business, there's no-one around to power-cycle the equipment >>>>>> and >>>>>> unrecoverable device hangs are really a disaster. I realize that >>>>>> the >>>>>> ISP >>>>>> business is a little different because the customer can always >>>>>> reboot >>>>>> the >>>>>> CPE! >>>>>> >>>>>> Tom S. >>>>>> >>>>>> ----- Original Message ----- >>>>>> From: "Robert West" <robert.w...@just-micro.com> >>>>>> To: <jai...@budget.net>; "'WISPA General List'" >>>>>> <wireless@wispa.org> >>>>>> Sent: Saturday, December 19, 2009 7:55 AM >>>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>>> >>>>>> >>>>>> >>>>>>> I'm with ya on all that, Jamie. We've had minor issues but I expected >>>>>>> things to not be perfect, they never are with version 1.0! The trade >>>>>>> off >>>>>>> is >>>>>>> worth it, for me anyhow. >>>>>>> >>>>>>> Bob- >>>>>>> >>>>>>> >>>>>>> -----Original Message----- >>>>>>> From: wireless-boun...@wispa.org [wireless-boun...@wispa.org] On >>>>>>> Behalf Of jai...@budget.net >>>>>>> Sent: Saturday, December 19, 2009 10:26 AM >>>>>>> To: WISPA General List >>>>>>> Subject: Re: [WISPA] Ubiquiti ready for prime time? >>>>>>> >>>>>>> >>>>>>> We use all UBNT and I have been very happy with the equipment. >>>>>>> Tower has 2 Rocket M5s With 120 sectors, backhaul is Rocket M5s with >>>>>>> the Rocket Dish. CPEs are Nano M5. Durring testing at 4 Miles with >>>>>>> CPE to AP I was able to sustain symmetrical speeds of 75M to our >>>>>>> test server on the other end of the backhaul. I was really amazed at >>>>>>> how well they preformed for the price. I have read all the horror >>>>>>> stories in the UBNT forums but have yet to have one problem. Probably >>>>>>> just cursed myself and should of kept my mouth shut. But so far so >>>>>>> good. >>>>>>> On Sat 12/19/09 6:35 AM , Mike m...@aweiowa.com sent: >>>>>>> I was almost ready to pull the trigger on some Ubiquiti equipment >>>>>>> for >>>>>>> a new project. The scent of low price is alluring. Then I start >>>>>>> reading about connectors pulling out, connectors not soldered on >>>>>>> properly, and the wrong boot code on boards. >>>>>>> Is it too early? Should I wait a bit before I dive in? Has the >>>>>>> haste to get product into the distribution stream compromised >>>>>>> quality >>>>>>> control? Is the low price just too good to be true? I'd be >>>>>>> interested in some constructive thoughts and analysis. >>>>>>> Thanks mg >>>>>>> >>>>>>> ---------------------------------------------------------------------------- >>>>>>> ---- >>>>>>> WISPA Wants You! 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