> > *The need to ping an Internet host just adds to the requirements. Pinging > your local router IP would meet the requirement of whether the BBB > interface is up. Adding Internet connectivity just added more complexity.* >
Come now do I really have to comment on something like this ? The solution is pretty obvious . . . If your application does not require an internet connection, then don't ping an outside address. Ping your internal gateway . . . On Tue, May 17, 2016 at 5:07 PM, Mike <bellyac...@gmail.com> wrote: > On 05/17/2016 05:55 PM, William Hermans wrote: > > *William:* >> *That would work. * >> >> *The only "edge case" I might see as a problem would be if your ping >> target went off line. Then the BBB would reboot itself every ten minutes >> even though nothing was wrong with the BBB. I guess you could ping several >> different targets in rotation and only reboot if they all disappeared.* >> > *This gets us back to a real cheap local watchdog.* > > You only need to ping one ip address. Your internet gateway IP. e.g. your > first hop outside of your local network. > > The need to ping an Internet host just adds to the requirements. Pinging > your local router IP would meet the requirement of whether the BBB > interface is up. Adding Internet connectivity just added more complexity. > > >> *As an aside: Does anyone know what test a computer runs to determine if >> it is connected to the internet?* >> *Most desktop/laptop computers have a different network icon as to >> whether the network/WiFi you connected to has internet connectivity. Is >> the Windows computer pinging some Microsoft location that is "guaranteed" >> to be up?* >> >> *--- Graham* > > I'm not 100% sure, but the test Windows does is not always correct. > Sometimes the icon shows not connected, when in fact as soon as you try to > surf something on the web, it goes to the working icon . . . > > My guess is that it does some simple DNS tests, and then after a while it > gives up checking. > > > On Tue, May 17, 2016 at 2:29 PM, Graham Haddock <gra...@flexradio.com> > wrote: > >> William: >> >> That would work. >> >> The only "edge case" I might see as a problem would be if your ping >> target went off line. Then the BBB would reboot itself every ten minutes >> even though nothing was wrong with the BBB. I guess you could ping several >> different targets in rotation and only reboot if they all disappeared. >> This gets us back to a real cheap local watchdog. >> >> As an aside: Does anyone know what test a computer runs to determine if >> it is connected to the internet? >> Most desktop/laptop computers have a different network icon as to whether >> the network/WiFi you connected to has internet connectivity. Is the >> Windows computer pinging some Microsoft location that is "guaranteed" to be >> up? >> >> --- Graham >> >> == >> >> >> On Tue, May 17, 2016 at 2:30 PM, William Hermans <yyrk...@gmail.com> >> wrote: >> >>> >>> @Graham, >>> >>> What I propose is that you do not need an Ethernet Micro connected to >>> the BBB. Instead, you have the BBB ping the outside world once every set >>> time frame, and it a ping comes back unreachable after say 5-10 minutes. >>> You just stop "kicking the dog". Which does present a potential problem >>> that Your internet connection may just be down. But a remote system that >>> reboots once every 5-10 minutes because the internet connection is down is >>> not something I'd personally see as a bad thing. After all you're unable to >>> connect to the system anyway. >>> >> >> == >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> <https://groups.google.com/d/msgid/beagleboard/CANN_KV6MEtkBkkjA-xc3KKzeNRh6LDpoB1xrBnN%2BZo6gJgLX6w%40mail.gmail.com?utm_medium=email&utm_source=footer> >> https://groups.google.com/d/msgid/beagleboard/CANN_KV6MEtkBkkjA-xc3KKzeNRh6LDpoB1xrBnN%2BZo6gJgLX6w%40mail.gmail.com. >> >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > <https://groups.google.com/d/msgid/beagleboard/CALHSORrk-KSfKb%3D%2By9tCHPNQSkvfC-K7YPr8cQsvmuwDXR6DCg%40mail.gmail.com?utm_medium=email&utm_source=footer> > https://groups.google.com/d/msgid/beagleboard/CALHSORrk-KSfKb%3D%2By9tCHPNQSkvfC-K7YPr8cQsvmuwDXR6DCg%40mail.gmail.com > . > For more options, visit https://groups.google.com/d/optout. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/ff9dc15c-5863-3d8a-ad54-f3800b5db277%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/ff9dc15c-5863-3d8a-ad54-f3800b5db277%40gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORpXxmBek%3DY21CNBNQCaCp7UgbBh0WnyRXSqUqrnsU7MWw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
