Enable full duplex and disabling autonegotiation for nic cards,

Modifying network settings

Add the following line in
/etc/sysconfig/network-scripts/ifconfig-eth0 &
/etc/sysconfig/network-scripts/ifconfig-eth2

ETHTOOL_OPTS="autoneg off speed 100 duplex full"

Restart network service
#service network restart

This will set network settings to full duplex, Speed: 100Mb/s & auto-negotiation: No

Run following commands to confirm network settings
#ethtool eth0
#ethtool eth1