Michael Brown <[email protected]> on Fri, 2014/05/02 17:40: > On 02/05/14 11:01, Christian Hesse wrote: > >> Is the datapath broken in both directions? > > > > No. The Dell notebook (the one acting as client and having the problem) > > receives packets. I can not see a single ethernet frame on the network > > sent from the notebook. > > > >> Are you able to transmit ARP > >> requests or broadcast pings, or observe received data via tcpdump? > > > > tcpdump receives all types of packets on the notebook. > > If you try sending a large number of packets (e.g. using arping or a > broadcast ping: anything that won't wait for a reply before sending out > the next packet) then what happens to the TX packet counts and error > counts reported by ifconfig?
server# arping -I device 172.16.1.5
ARPING 172.16.1.5 from 172.16.1.1 device
notebook# arping -I enp0s25 172.16.1.1
ARPING 172.16.1.1 from 172.16.1.5 enp0s25
notebook# ip -s link show dev enp0s25
2: enp0s25 [...]
link/ether 01:23:45:c0:ff:ee brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
2214 346 0 0 0 0
TX: bytes packets errors dropped carrier collsns
2892 4 0 0 0 0
RX packet and byte count increases, TX count does not.
Actually the system has a TX packet count of four, no idea where this comes
from. I can not increase it any further.
> Does tcpdump running on the notebook see its own transmitted packets?
Yes, it does.
> > Did a warm reboot and tried to boot via UNDI. BIOS reported:
> >
> >> PXE-E05: The LAN adapter's configuration is corupted or has not been
> >> initialized. The Boot agent cannot continue.
> >
> > Though this is not reproducible. After a cold reboot everything ist just
> > fine again.
>
> Good to know, but it's probably going to be easier to try to diagnose
> the problem from within Linux first.
Ok. :D
Does it help if I provide ssh access to a device suffering the issue? There
is no sensitive data on it.
--
main(a){char*c=/* Schoene Gruesse */"B?IJj;MEH"
"CX:;",b;for(a/* Chris get my mail address: */=0;b=c[a++];)
putchar(b-1/(/* gcc -o sig sig.c && ./sig */b/42*2-3)*42);}
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