Hub Gathering ?

?? No way I know how to do as you're suggesting (I think).

I don't think you can do that on a hub. I have done it on a Cisco 4000 switch. What you are wanting to do is a bit of adapter teaming in that you are programing 2 switch ports to act as one and the network adatper must support the adapter teaming so that it can utilize the progrmmed switch ports. Theory 100 MB full duplex is now doubled and if you do this on dual nics then it is possible to load balance. It depends on the hardware and you ability to program the device (switch ports). The easier and best solution is to buy a faster switch 10/100/1000. Cost more but a heck of a lot easier to do and manage than what you are thinking of.

You can't do it with the hubs.
Remember, hubs are just physical devices, and basically just pass electrical signals. You will need a switch to bump up the speed. We use 3Com switches and had trunking configured with four ports acting as if one, thus bumping the speed to theoretical 800 Mbps. You can, of course by a Gb switch, but they normally are more $$ than 10/100's

Does duplex come into this at all?

This is not a good idea.
This can be done by multihoming the clients to both hubs, etc. In theory it works, in practice, the collisions and the load balancing problem screw up everything and the network actually slows down.
Regards, Chris

You are talking about Port trunking (link aggregation). It is only supported on switches(not on Hubs).
Port trunking (or link aggregation) can help to reduce the bottleneck by providing extra channels to carry data between switches.
Most of the switches support 4 trunk groups summing upto 800Mbps transfer rate in Full duplex.
Purchase switch and see the manual to configure the port trunking or write to me for the config.

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