ifconfig packet errors

If "ifconfig" or "/proc/net/dev" shows you are getting packet errors and collisions, check that the network interface is not running at half-duplex. Full duplex would enable packets to flow in both direction in and out simultaneously.

ethtool eth0

To turn on full duplex:

ethtool -s eth0 speed 100 duplex full autoneg off

Verifying with `mii-tool eth0` should produce:

eth0: 100 Mbit, full duplex, link ok

Make this permanent by editing "/etc/sysconfig/network-scripts/ifcfg-eth0" and add:

ETHTOOL_OPTS="speed 100 duplex full autoneg off"