[Samba] excessive TCP retransmissions with samba 3.0, slow file opening

[Michael Joyner]

>>Hubs? HUBS? I hope you meant switches. If not, go buy some switches.
> 
> 10/100 hubs.  This is a small client, with limited hardware budget.
> So, it's a pair of 8-port 10/100 hubs, connected.

> I cannot find any differences between the fast machine and the "slow" machines--except the fast machine has slightly older hardware than the slow machines.
not all brands of ethernet cards negotiate properly
with a 100/half duplex hub

MANUALLY SET THE DUPLEX ON THE CLIENTS to *HALF*

Especially if they have 8139 ethernet cards and see if that helps.