September 26, 20205 yr I had originally built and tested my NAS machine and thought I would upgrade to 10 Gb/s network. I had zero issues with anything in terms of configuration, set up, everything was working. I decided to test my connection speed with iperf3 and realized it was only around 3-3.5 Gb/s and started researching reasons why. I found Spaceinvaderone's video on MTU size and was working on trying to increase on the NAS (no problem) my PC (no problem) but was struggling on my QNAP switch because for whatever reason could not access the interface to change the settings. While I was messing around with all these things I for some reason lost access to my NAS. It is showing on the router list but as the MAC address of the NIC and not the NAS name like it used to, same as my PC also showing as the MAC address of the NIC and not the name. If I attempt to access the NAS through chrome with ip address it says the site cannot be reached. It pings, very confused because I don't think I did anything that should resulted in this. Any help would be appreciated with first the connection issue and second with the speed, thanks in advance. NAS CPU-AMD Ryzen 5 3400G Motherboard - Asus ROG Strix X570-E RAM - Corsair Vengeance LPX DDR4 2133 MHZ -16GB PSU - Corsair HX-850 Storage - WD Red+ 10TB drives x 6 (Cache Samsung 970 EVO plus NVMe M.2 2TB x 2) NIC - X520-10G-1S-X8 (SFP+) - connected with fiber optic PC Windows 10 NIC - X520-10G-1S-X8 (SFP+) - connected with fiber optic Switch QNAP QSW-M408S Edit - Not sure if this helps but it is showing in Windows Explorer under network but when I click on that the folder is empty even though I have made a few shares. Currently no data is on the array Edit - apparently it is accessible from another PC on the network, this PC doesn't have a 10Gb NIC Edit - apparently it is also accessible on the original PC through the 1 Gb NIC; the NAS is still using its 10 Gb NIC so thinking the problem is somewhere on the 10 Gb NIC configuration on the PC Edit - fixed the configuration issue on my PC's NIC. NAS is visible but still have only 3 Gb/s transfer rates. Cannot figure out how to change to Jumbo Frames MTU=9000 on the switch, hoping this is the culprit Edited September 27, 20205 yr by GregPS
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