looking for ethernet errors, collisions
Tom Judge
tom at tomjudge.com
Thu May 24 08:51:30 UTC 2007
Chuck Swiger wrote:
> On May 23, 2007, at 4:25 PM, RW wrote:
>>> Well, there are plenty there on my sis0 interface (internal).
>>>
>>> [msoulier at kanga ~]$ netstat -i
>>> Name Mtu Network Address Ipkts Ierrs Opkts
>>> Oerrs Coll
>>> sis0 1500 <Link#1> 00:0a:e6:4a:56:c2 37989565 3980 36808783
>>> 5749 6492857
>>> sis0 1500 192.168.1 kanga 12380344 -
>>> 9255757 -
>>
>> What are collisions in this context?
>>
>> Traditional ethernet collisions aren't possible on modern hardware,
>> since there's never more than one output writing to each twisted-pair.
>
> Even though all modern NICs will happily do full-duplex operation when
> connected via a switch, people still use hubs rather than switches,
> sometimes.... :-) You can still get ethernet collisions on a hub.
>
In theory it is also possible to have collisions using a switch when the
switches switching backplane is flooded.
Tom
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