[c-nsp] Speed Issues

Case Hugo cisco at elkgrove.net
Thu Feb 2 16:16:45 EST 2006

The reason I hard-set the speed and duplex is that that was recommended in 
another newsgroup.

I just set the server to 100 / full and the speed increased from 80kbps to 
1.5 mbps which is an inprovement but still not the 5-8 mbps that it should 
be.   But at least people should be able to download their attachments with 
out problems.

Thanks for all the help

----- Original Message ----- 
From: "John Neiberger" <John.Neiberger at efirstbank.com>
To: <cisco-nsp at puck.nether.net>
Sent: Thursday, February 02, 2006 11:19 AM
Subject: Re: [c-nsp] Speed Issues

>>>> "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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