On 8/17/2010 3:47 PM, Chris Baker wrote:
>
> The backuppc server and the slow machine are both plugged into the same Dell
> switch.
>
> I have also observed that the other three PC's that were bought at the same
> time are not on the same switch. They actually pass through a 100 Mbps
> router and two switches.
>
> The more direction connection is actually a slower one.

It's not a common problem anymore, but back in the days when switches 
didn't negotiate well people often manually configured server NIC and 
managed switch ports to use full duplex - which is fine if you set both 
ends.  But, if you swap out the switch with one that you expect to 
autonegotiate correctly and forget to change the connected server 
settings you'll end up with a mismatch (a host configured for full 
duplex turns off negotiation, which forces the connected device to 
assume half duplex).  Not likely now, but still worth checking.

-- 
   Les Mikesell
     lesmikesell AT gmail DOT com


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