On 2016-04-26 10:52, Thomas Schäfer wrote: > @Jeroen > Thanks for the definition of router and cpe. > > > But the chain of problems must be long: > > dead DNS-resolvers by isp > > dead DNS-resolvers not recognized by the "cpe" as a cache resolver
Dead-detection is a standard thing. Only apparently Android does not do this. > slow/no switch to alternative DNS-resolvers at the enduser device. The enduser device uses the CPE, if that does not work for whatever reason the user will just consider this as "broken internet" (as they do not know better, and they should not). Their first thing is to power off then power on the device, if that does not work, they will call their ISP for support who will then do whatever magic to fix things. > All three instances with bad software / without monitoring? When all ISP resolvers are dead, the ISP will have a *LOT* of support calls (which is a costly thing). That next to hoping the monitoring they have in place. If they do not have functioning monitoring in place, and also actually check those alerts, I don't think one should consider calling that "ISP" a ISP. But yes, those places do exist. Likely this does not happen though when they dogfood their own servers, which is likely, as then their own stream of cat pictures stop functioning... Best Internet monitoring well over a decade ago: Gamers playing Quake... Greets, Jeroen
