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Internet is dying - diagnostics


On 22 October 2017 at 10:05, Volker Wysk <post at volker-wysk.de> wrote:
> Am Sonntag, 22. Oktober 2017, 09:47:28 CEST schrieb Colin Law:
>> On 22 October 2017 at 09:29, Volker Wysk <post at volker-wysk.de> wrote:
>> > desktop ~ $ traceroute 193.99.144.80
>> > traceroute to 193.99.144.80 (193.99.144.80), 30 hops max, 60 byte packets
>> >
>> >  1  192.168.178.20 (192.168.178.20)  2747.404 ms !H  2747.386 ms !H
>> >  2747.376>
>> > ms !H
>> >
>> > The IP belongs to heise.de. So it should be all right. The traceroute
>> > command takes some 10 seconds. No more output.
>> >
>> > Does this hint at a broken router?
>>
>> Well 192.168.178.20 is your own address, so it doesn't get any further
>> than that. So that suggests either your network card, the
>> cable/connectors or the router.
>
> I think, it's the router. The connection was broken, just now, and I turned
> the router off/on. When the router's lights finished blinking, the connection
> was back.

Not necessarily the network card might be confused and recovers by
being, effectively, disconnected and reconnected. You might find the
same thing if you unplug the cable wait for 10 seconds and plug it
back in.

>
>
>> Are there other devices plugged into
>> the router?
>
> My laptop and my smartphone, are "plugged in" over WLAN.
>
>> if so then switch the connections for yourself and the
>> other device

I meant unplug the two cables and plug them back in but the other way
round, so if it is just one connection in the router then the PC
should now work and the other device might be intermittent.

>
> You mean, interchange the two network cables? (I've got only one, but I also
> don't really understand.)

How can you only have one cable if the PC and the smartphone are both
plugged in? Perhaps you mean that the phone is on wifi and only the PC
is plugged in. In which case try the cable in another socket on the
router and if that doesn't help then get hold of another cable, with
luck it is that.  If not then it may be difficult to determine whether
it is the router or the PC if you haven't got something else to plug
in to test it.

>
> Networks cards are integrated in the motherboard, nowadays, aren't they? Can't
> be disconnected.

Yes, very likely.

Colin