Jumbo Frames, MAX MTU
Posted on 2012-09-18
I want to enable jumbo frames on my NAS and server. My switch, netgear GS748T, supports it as well as the NAS, netgear readynas 1100, and server NIC i believe. The server nic is a Broadcom BCM5708C NetXtreme II. I set Jumbo MTU to 7500 on the server. I set the max. frame size on the ports on the switch to 7500. I turned on jumbo frames on the netgear readynas 1100.
When I ping from the server to the nas with ping -f -l i get times out on anything above 1476.
When I ping from teh server to the switch i get time outs on anything above 1472.
When I ping 127.0.0.1 from the server i get packet needs to be fragmented message on anything 1492.
I guess the server nic is not handling the jumbo frames then?
is pinging 127.0.0.1 a sufficient test for testing the server handling jumbo frames?
do i need to reboot when i make these changes?