Internet is dying - diagnostics

[Colin Law]

Are you on two local networks? You have two addresses, 192.168.178.20
and 192.168.122.1?
When it is working run
traceroute <some ip address>
You might have to install something to get traceroute, I think it will
tell you what.
Then do it again when it is broken. With luck that will tell you where
the link is broken

I presume others connected to the same router are not having problems.

Colin

On 21 October 2017 at 16:26,  <post at volker-wysk.de> wrote:
> Hi
>
> Now the connection is down again. I'm writing this with my laptop and
> webmail... Here are the diagnostics:
>
> 1. ifconfig
>
> desktop ~ $ ifconfig
> enp2s0    Link encap:Ethernet  Hardware Adresse 60:a4:4c:4e:17:47
>           inet Adresse:192.168.178.20  Bcast:192.168.178.255
> Maske:255.255.255.0
>           inet6-Adresse: fe80::967a:55d6:22b8:8659/64
> Gültigkeitsbereich:Verbindung
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
>           RX-Pakete:18590 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
>           TX-Pakete:21091 Fehler:0 Verloren:0 Überläufe:0 Träger:0
>           Kollisionen:0 Sendewarteschlangenlänge:1000
>           RX-Bytes:5836977 (5.8 MB)  TX-Bytes:3725082 (3.7 MB)
>
> lo        Link encap:Lokale Schleife
>           inet Adresse:127.0.0.1  Maske:255.0.0.0
>           inet6-Adresse: ::1/128 Gültigkeitsbereich:Maschine
>           UP LOOPBACK RUNNING  MTU:65536  Metrik:1
>           RX-Pakete:26912 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
>           TX-Pakete:26912 Fehler:0 Verloren:0 Überläufe:0 Träger:0
>           Kollisionen:0 Sendewarteschlangenlänge:1
>           RX-Bytes:5745757 (5.7 MB)  TX-Bytes:5745757 (5.7 MB)
>
> virbr0    Link encap:Ethernet  Hardware Adresse 00:00:00:00:00:00
>           inet Adresse:192.168.122.1  Bcast:192.168.122.255
> Maske:255.255.255.0
>           UP BROADCAST MULTICAST  MTU:1500  Metrik:1
>           RX-Pakete:0 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
>           TX-Pakete:0 Fehler:0 Verloren:0 Überläufe:0 Träger:0
>           Kollisionen:0 Sendewarteschlangenlänge:1000
>           RX-Bytes:0 (0.0 B)  TX-Bytes:0 (0.0 B)
>
>
>
> 2. dhcp-discover
>
> desktop ~/Internetproblem $ sudo ./dhcp-discover -i enp2s0 -e
> 60:a4:4c:4e:17:47
> Ethernet hw addr to do discovery on : 60:a4:4c:4e:17:47
>
>  - beginning of dump -
> DHCP operation          : request
> Hardware type           : ethernet
> Hardware address length : 6 bytes
> Hop count               : 0
> Transaction ID          : 0xdeadbeef
> Number of seconds       : 0
> Flags                   : 0x8000
> Client IP               : 0.0.0.0
> Your IP                 : 0.0.0.0
> Server IP               : 0.0.0.0
> Gateway IP              : 0.0.0.0
> Client hw addr          : 60:a4:4c:4e:17:47
> Server hostname         :
> Boot filename           :
> Options
>   Magic header          : 0x63825363 (OK)
>   Message type          : discover
>   Option 0x37           : len 7
>  - end of dump -
> desktop ~/Internetproblem $
>
>
> 3. ping IP-Address:
>
> desktop ~/Internetproblem $ ping 193.99.144.80
> PING 193.99.144.80 (193.99.144.80) 56(84) bytes of data.
> From 192.168.178.20 icmp_seq=1 Destination Host Unreachable
> From 192.168.178.20 icmp_seq=2 Destination Host Unreachable
> From 192.168.178.20 icmp_seq=3 Destination Host Unreachable
> ^C
> --- 193.99.144.80 ping statistics ---
> 4 packets transmitted, 0 received, +3 errors, 100% packet loss, time
> 3016ms
> pipe 3
>
> desktop ~/Internetproblem $ ping heise.de
> (no output)
>
>
> Volker
>
>
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