Question Computer freezes transfers over the LAN. Question 10GB Ethernet File transfer slow from PC to Mac, but not from Mac to PC Question TP Link Gigabit Powerline transfer rate is high, but actual internet speed test is slow Question Erratic Transfer Speeds to Home-Build Truenas NAS Question How to get fast/faster File Server Transfers - Where is my bottleneck? Question only getting 25% speed of internet I pay for (Gigabit Comcast cable) Question Why am i not getting the speeds im paying for? Question increase internet globla speed with gre tunnel is really? D-link DES-1026g 23-10/100mb and 2-1000mb, internet speed above 100mb, but when switch engaded is 9mb You should see over 900mbps in both directions. IPERF tends to be the best tool because it is not affected by things like disk speed or file structure. Very technically even the bad data is transferred at full speed. The only way you get less transfer is if the packets are damaged and are discarded. Pretty much a ethernet cable transfers at full speed all the time. A non defective cable will most times have zero errors. The errors mostly occur when a user unplugged his machine from the port. Then again I used to see reports on many thousands of ports and the numbers were many times zero. Many commercial switches have this feature. What would be really nice is if you could see the number of packet errors your got on ethernet cables. It will in effect make the cable into a crossover cable with software. I have not seen a 100mbps port in a pc in a very long time and the ones that are in router have a feature called MDX that allows you to use straight cables. It actually transmit and receives on all 4 pair in both directions at the same time. The concept does not really exist for gigabit cables. You should not use any form of crossover cable. I think you can skip the -c on the client side not sure realized I did not have iperf loaded on any of my machines. If you do not have a router in between you must manually assign ip addresses. Iperf is pretty simplistic to use so I would keep trying.
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