> > First they changed all their network cards, and experienced speed
> > degradation. Then they fixed them at 1000 mbps and got no improvement.
> > Then they fixed them at 100 mbps and went back to normal speed.

> Is the cabling (up to and including the connectors, mural
> outlets, ...) really Gbps compliant?
> Often, upgrading all NICs is only part of the Gbps upgrade.

I'll second this.
It sounds a lot like the Gbps NICS are spending all day re-transmitting lost
packets through under-spec'd cables.

N.