Unable to change NIC settings with ethtool

hjazz6 · 05-22-2012, 05:52 AM

Hi all,

I'm trying to change my NIC (Intel 10G NIC) settings using ethtool, but can't seem to do that.

I tried

Code:

ethtool -G xge0 rx 32768 tx 32768

and then tried to see if the settings have changed using

Code:

ethtool -g xge0

But I see the output

Code:

Ring parameters for xge0: 
Pre-set maximums: 
RX:        4096 
RX Mini:   0 
RX Jumbo:  0 
TX:        4096 
Current hardware settings: 
RX:        4096 
RX Mini:   0 
RX Jumbo:  0 
TX:        4096

Why can't I change the settings?

Thank you.

Regards,
Rayne

Slackyman · 05-22-2012, 10:05 AM

Because 4096 is the maximum value for RX and TX parameters of the ring size that a NIC can handle.
The ring size can vary from 128 to 4096.