Ethernet diagnostics software

rorith at rorith at
Fri Mar 24 22:33:02 MST 2006

> rorith at wrote:
>>> This email is coming to you over 430 feet of cat5e cable, which is good
>>> news, because it means that my "long-haul" ethernet link is working, at
>>> least it appears to be. Does anyone know of any good software to test
>>> and diagnose an ethernet network so I can be confident that I'm not
>>> getting any dropped packets?
>>> --Dave
>> 'ifconfig' >.>
>> But yes, Ethereal is probably good.
> Can Ethereal diagnose the physical aspects an ethernet network? My
> understanding is that by the time Ethereal gets its hands on the data,
> any diagnosis of the physical network is impossible. I want to know if
> I'm getting any dropped packets, bit errors, and stuff of that nature.
> Something like netperf but for diagnosis of the physical stuff. Any
> other ideas?

Output of ifconfig. Notice the 'RX/TX Packets' lines, with errors,
dropped, and whatnot.

eth0      Link encap:Ethernet  HWaddr 00:00:1A:19:2F:76
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::200:1aff:fe19:2f76/64 Scope:Link
          RX packets:52551893 errors:0 dropped:0 overruns:0 frame:0
          TX packets:59455918 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6905352431 (6585.4 Mb)  TX bytes:39305941535 (37485.0 Mb)

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