Internet is dying - diagnostics

[Volker Wysk]

Am Samstag, 21. Oktober 2017, 21:05:45 CEST schrieb Xen:
> post at volker-wysk.de schreef op 21-10-2017 15:26:
> > 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 -
> 
> Normally this dump would contain responses from DHCP servers.

It's the same output at the moment, now that the connection is up.


> The only thing dhcp-discover requires is for the link to be up:
> 
> sudo ip link set enp2s0 up
> 
> But if you set it "down" it disappears from ifconfig, so that is not it.
> 
> So basically your entire hardware device stops working.

So the network card is broken?

 
> I don't know at this point how to test ethernet using ethtool.
> 
> This runs a self-test:
> 
> sudo ethtool -t enp2s0

This doesn't work, although it is in the man page. Does that mean that my 
network card (device) doesn't support it?

desktop ~/Internetproblem $ sudo ethtool -t enp2s0 online
Cannot test: Operation not supported
desktop ~/Internetproblem $ sudo ethtool -t enp2s0 offline
Cannot test: Operation not supported
desktop ~/Internetproblem $ sudo ethtool -t enp2s0 external_lb
Cannot test: Operation not supported
desktop ~/Internetproblem $ sudo ethtool -t enp2s0 
Cannot test: Operation not supported


> sudo ethtool -S enp2s0 will also give error statistics.

desktop ~/Internetproblem $ sudo ethtool -S enp2s0
NIC statistics:
     tx_packets: 43833
     rx_packets: 45593
     tx_errors: 0
     rx_errors: 0
     rx_missed: 0
     align_errors: 0
     tx_single_collisions: 0
     tx_multi_collisions: 0
     unicast: 45287
     broadcast: 92
     multicast: 216
     tx_aborted: 0
     tx_underrun: 0


> Unless you:
> 
> - have another computer on the network with the same IP

I don't, I've checked.

 
> It seems to me that you have a hardware failure.

So, build a new network card? The current one should be on the main board, not 
changable.


Volker