[c-nsp] Speed Issues

John Neiberger John.Neiberger at efirstbank.com
Thu Feb 2 14:19:40 EST 2006


>>> "Justin M. Streiner" <streiner at cluebyfour.org> 2/2/06 11:51:42 AM
>>>
>On Thu, 2 Feb 2006, John Neiberger wrote:
>
>> There's your problem. Hard-setting your speed and duplex is a very
bad
>> idea. In this particular case, I would bet that the interface facing
the
>> server is seeing a lot of input errors and the interface on the
server,
>> if you could see the stats, is seeing late collisions. The problem
is
>> that some devices still participate in auto negotiation even when
you
>> have manually configured the speed and duplex. If they don't detect
an
>> autonegotiating link partner they will assume that they're connected
to
>> a hub and drop back to half duplex, which results in a duplex
mismatch.
>>
>> Configure *both* sides to AUTO and all should be well.
>
>Or configure the NIC in the server to run at 100/full.  It's been my 
>experience that speed/duplex autonegotiation doesn't always produce
the 
>best results.

I believe that is his problem. Unless I misread his post, he already
has it hard-set to 100/full and he's probably getting a duplex mismatch
for the reasons I stated.

John
--


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