I can't get Jumbo frames to work

[tzpmrz]

there is only one NIC on this motherboard so I'm not using any link aggregation.
I have read all of the links I can about it, I'm not using anything special as far as the NIC setup is concerned.

NAS4Free 9.1.0.1 (636)
Gigabyte Z68AP-D3
1 x Realtek RTL8111E

iSCSI is the only active service.

Network->Lan management shows 9000, no ip6, gateway is defined for NTP.
the system has been rebooted.
no matter what I do I only see 1500 on the status->lan page it refuses to let me change it.

is the system auto-tuning down when it sets up the NTP ?

[raulfg3]

if you revise wiki: http://wiki.nas4free.org/doku.php?id=na ... s_hardware

you can see that realtek max MTU is 6000 not 9000, use 6000 or less and must work

[tzpmrz]

Thanks you so much, that fixed it.
I used MTU = 6000 and now it receives packets at apx 6000 size and sends out data at apx 4500 size. this was all I needed to get over 90% of the 1Gbs capacity ( up from about 50% ). my little test setup doesn't have enough disk bandwidth to keep the NIC that busy all the time. One more dive should fix that.

[raulfg3]

if you need better speed or MTU, please consider to buy an Intel NIC.

[crowi]

I have the same one on board:

1 x Realtek RTL8111E

now it's set to 6000 too, thanks for the information

you never stop learning

[Joman]

Hy you can check the correct MTU rate with

ping -f -l [your packetsize to check] [targethost]

example ping -f -l 1500 192.168.178.28

if [your packetsize to check] is too big you get packet must be fragmentet

than try a smaler size of packets

if you have a switch in your network, the switch can have other MTU than the NIC

regards Joman