You need to make sure the frame size on your hosts is smaller than the frame size on the switches and routers. So, if the switches and routers are set to a jumbo frame size of 9014, you need to make the host frame size small enough to allow the jumbo frame header to be attached. At least for testing, you can decrease the frame size a bit on the hosts to ensure the jumbo packet is making it through the network infrastructure.
https://en.wikipedia.org/wiki/Jumbo_frame#Super_jumbo_frames
http://www.mylesgray.com/hardware/test-jumbo-frames-working/
John
Hi John,
Thank-you for the help...
I know our equipment is allowing jumbo packets / Frames through as i have recently discovered that one of our machines on the network has access to the server without a hitch.. - Lets call it system 1 - ... i have checked the settings on both Systems 1 & 2, they are duplicate to each other but i cant access on system 2...
What i have also discovered is if i have the servers MTU set 9014 and set system 2 jumbo packets to disabled i can connect to the server fine and achieve transfer rates of over 100MB/s......... Which has confused me slitly as when the server is at default values i get between 10 / 20 MB/s
Any ideas ?
Hardware for both system 1 & 2
Acer Veriton X4620G
Intel® PRO/1000 Server Adapter NIC
16GIG DDR3 Ram
Intel I5
WINDOWS 8.1 ' Both Fresh installs '
Cheers
Steve