Linux CentOS how to force 1000megabits ifconfig eth0
ethtool -s eth0 speed 1000 duplex full autoneg off
In my case it's peth0.
Other commands:
lspci |grep Ethernet
dmesg |grep eth0
ethtool eth0
ethtool -k eth0
ethtool -S eth0
To make the changes permanent, edit
/etc/sysconfig/network-scripts/ifcfg-eth0
add
ETHTOOL_OPTS="speed 1000 duplex full autoneg off"
Ref:
http://www.cyberciti.biz/tips/howto-linux-add-ethtool-duplex-settings-permanent.html
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=19544&forum=40
http://www.dslreports.com/forum/r22221731-Gigabit-NIC-only-working-as-100meg-in-CentOS
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