understanding ethtool -g and Rx Jumbo

[joe_91]

Could someone throw more light on this option, here is the info i have

ethtool -g eth0
Ring parameters for eth0:
Pre-set maximums:
RX: 1020
RX Mini: 0
RX Jumbo: 4080
TX: 255
Current hardware settings:
RX: 255
RX Mini: 0
RX Jumbo: 0
TX: 255
------------------------------------------

network-scripts]# more ifcfg-eth0
# Intel Corporation 82571EB Gigabit Ethernet Controller
DEVICE=eth0
---------------------------------------
ethtool -i eth0
driver: bnx2
version: 2.0.2
firmware-version: 4.4.14 IPMI 0.1.16
bus-info: 0000:02:00.0

Could someone explain how to tune RX, RX Mini and RX Jumbo and what would be the impact?

Thanks

Joe

[MSwift]

I think the RX setting could be tuned with ethtool -G, but the RX Jumbo cannot be. Once you change the RX the Jumbo automatically sets itself.

Thanks

Mike.

[joe_91]

is the buffer setting built in to the card?

Thanks

Joe