Allied Telesis AT-2912T - Manual (Page 86)

Chapter 6: Enabling LINUX
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On Red Hat distributions, you can specify “ethtool -s” parameters in the
ifcfg-ethx scripts using the ETHTOOL_OPTS keyword. The specified
ethtool parameters are set up during ifup. For example, go to the following
directory:
/etc/sysconfig/network-scripts/ifcfg-eth0
Add the following line to the script:
ETHTOOL_OPTS=”wol g speed 100 duplex half autoneg off”
Driver Default
Settings
Table 5 lists the default settings of the Linux driver.
Table 4. Ethtool Utility Examples
Action Commands
Display current speed, duplex, and link
status ethtool eth0
Change speed, duplex mode, and
autonegotiation status to 100Mbps
half duplex, and no autonegotiation ethtool -s eth0 speed 100
duplex half autoneg off
Change speed, duplex mode, and
autonegotiation status to 100Mbps full
duplex mode, and no autonegotiation ethtool -s eth0 speed 100
duplex full autoneg off
Display flow control settings ethtool -a eth0
Turn off flow control ethtool -A eth0 autoneg off rx
off tx off
Display offload settings ethtool -k eth0
Turn off TCP Segmentation Offload
(TSO) ethtool -K etho tso off
Display statistics ethtool -S eth0
Perform a self-test on an interface that
is up and running ethtool -t eth0
Table 5. Linux Driver Settings
Feature Default Setting
Speed Autonegotiation with all speeds
advertised
Flow control Autonegotiation with Rx and Tx
advertised
MTU 1500 (range 46 - 9000)