I see your statement about the Full Duplex being supported by switches and
not by hubs. I don't dispute this one bit. However, what I see is quite out
of sync with this or most of other expectations... Anyway, I left the
hardware alone after thinking about the behavior and now you are confirming
my choice. It is impossible for the network hardware to slow down the copy
process yet keep other functions (like the NetMeeting) responsive - it must
be the software... (I got enlightened with the morning sun....) The twist:
it worked, more or less, in all settings! (All tests were monitored by the
SBS/NT performance monitor tool showing network traffic...)
PS: Wouldn't you expect the dual-speed hubs to be switches when it comes to
the 10-100 conversion itself?
> I read the post. Full Duplex should NOT work through a Hub! Sounds like
> the driver is confusing full and half duplex, flipping a bit somehow. Try
> hooking up a switch, and see if half duplex works. You could set up some
> batch files to copy to and from a RAM disk. With traffic both ways at
> you would see a difference under performance monitor
> Mal Osborne
> MCSE Mensa
> > Right, I use a hub and not a switch... However, it is the half-duplex
> > setting that doesn't work! (Reread my post.) What's perplexing is that
> > the full-duplex but the half-duplex causes only the copying to slow down
> > rare spikes as shown on the performance monitor... Can this be a W2K
> > software component (like a driver) related? By the way, the W2K client
> > 3Com EtherLink XL 10/100 PCI (just as the SBS) that I set to the
> > settings to approximate specific network speeds.
> > - Robert.
> > > You are connected to a duel speed hub, not a switch, right? In that
> > > full duplex should not work at all! Full duplex requires a switch.
> > > everything is working properly, the performance differance between
> > and
> > > half duplex should be minimal, probably unnoticeable.
> > > Mal Osborne
> > > MCSE Mensa
> > > > Why is that a NIC on W2K set to half-duplex at 10 Mbps connected
> > a
> > > > dual speed hub to a SBS 4.5 100 Mbps NIC makes copying 3-5MB files
> > > > practically * impossible *?!?! The Performance monitor on the SBS
> > > registers
> > > > only * sporadic * activity with the Server
> > > > lines. The additional twist: I was watching the performance monitor
> > > > NetMeeting running on the W2K involved in the copying! Yet, setting
> > > NIC
> > > > on the W2K to full duplex makes the network buzz happily at 90-100%
> > > > utilization... Any words of wisdom as to the half-duplex behavior?
> > > > points of reference would be equally appreciated.
> > > > - Robert.
> > > > PS: The SBS4.5 has 128MB, IDE HD, 1 user, and all services but
> > > > running.