[RESOLVED] How do you achieve the 200mb/s throughput (full duplex)

[dlp111]

I was wondering how to achieve the "full duplex" 200mb/s throughput if my equipment supports it? What needs to be done??? thanks [email protected]

[Deity]

Theoretically, and this is in an ideal situation, a 100MB NIC connected to another 100MB device(NIC, switch, etc...) running on full-duplex acheives a speed of 200MB/s. This is NOT 200MB/s transfers. Marketing people say 200MB because it is really supposed to be 100Mb in each direction. Meaning you can get data in at 100MB/s and send data out at 100MB/s at the same time. This is what full-duplex does. Half-duplex would only send or recieve.

So, as long as you have the devices on the network setup to run on 100MB full duplex (autosense is best) then that is the best you are going to get.

I may be wrong on some of the technical details, but you get the idea. Hope I helped, or at least confused you a little.

[dlp111]

That makes sense, Thanks!

[Deity]

Glad I could help.

[kannibul]

It also helps to have a switch and not a hub.
last I knew - hubs worked only in half duplex.

[silencio]

Yep. You have to have a switch and it's a good idea to manually set the port and NIC in question to Full Duplex. Autonegotiation is a sketchy thing and doesn't work well.

[Higg]

For info: Hubs can't do full duplex, as they connect point-to-multipoint, what means that all devices are listening to the signal...
Switches realize a point-to-point connection, so that they can use the whole bandwith without collisions and the connection partners are virtually direct-connected (so no device other than the two partnes and the connecting switch gets involved - that's a base for full duplex)

[cyberhh]

Yes, it is a good idea to set the client and switch port to 100/Full - autosensing on both clients (or just one or the other) can cause network collisions and a dramatic loss of speed.

[Deity]

I agree with the others on setting the NIC to run at 100MB/Full duplex. The only reason I suggested Autosense was to allow for every instance on your network, whether it be designed to run on 100MB, 10MB or whatever...

In fact, I make sure that all the systems in my office are manually set to 100MB/Full duplex.