Network question

Jay West jwest at classiccmp.org
Sun Dec 31 20:29:57 CST 2006


You wrote...
> Just trying to figure out why a 2 GHz box is getting consistently
> beaten by a 225 MHz one.

This sounds like the classic problem of a duplex mismatch between the device 
and the hub. A lot of folks don't realize it, but when you mix 
10mb/HDX/100mb/FDX devices in a single network - you would THINK that the 
devices would autonegotiate identical settings on both ends. C'mon, they 
even SAY they autonegotiate on the box, and they DO have an 'auto' setting, 
right? Fact is, they get it wrong better than 80% of the time. Even two 
devices from the same manufacturer usually don't autonegotiate right. 
Pretend that "autonegotiation" doesn't exist. Set both ends manually to 
identical settings. If one

Some will say - this can't be... I plug them in and they work, and the right 
speed lights come on! And they pass traffic JUST fine. Don't trust this. 
FDX/HDX mismatches can create very odd looking wierdness. Like a connection 
that SEEMS to work, but is actually working very poorly.

Jay











More information about the cctalk mailing list