Thanks for the reply Pete.
I'm pretty sure there is no buffering going on in the switch.
I have an ELSA Gladiac 511 PCI graphics card on the client, which I was told would be fine for this purpose by PM and does not exhibit any jerky behaviour. It's just the time delay.
I have not tried IPX/SPX yet, but I'll give that a go when not at day job :(
The log files tend to say that packets got through but took n attempts, where n varies around 10-20 etc. Max frame rate achieved is usually around 30 or so, with average around 8 on a good day.
I have XP Pro on the client, without any service packs. It's just the bare vanilla install from the CD I bought. The client is not accessing the internet so I didn't see the point in service packing it up.
However the Server has been updating automatically (XP Pro) as and when there are updates, (although I have now disabled this as per PM guidance). I wonder if the differences between systems would be a problem?
I'll see what happens under IPX/SPX.
Thanks again,
Hugh