Should I enable a jumbo frame size of 9000 bytes for my NICs if I am running a gigabit network? Will it increase performance?
For this scenario: PC to router to PC, on a gigabit network.
The deal is this: If everything on your network supports jumbo frames, than by all means, enable it and test. If your NICs are reasonable, and your cabling is without serious problems, you might see an increase in performance. How much? It depends on a lot of factors: how many computers, how good/fast is your switch, network traffic patters, etc. But generally not more than 10% percent in a typical home network or small office network environment.
Here are some testing results from boche.net:
If you have at least one device on your network that does not support jumbo frames (network printer, SIP phone, etc.) then you cannot use jumbo frames at all. Otherwise you won't be able to talk to that device.
It is false - you can have a device that do not support jumbo frames and it will work as it works to me – I have home gigabit network with a network printer and all work perfectly – switch simply chopping the jumbo frame into the chunks able to be accepted by the 100M network printer. The author obviously speaks story out of his own experience.