getting this from logs or dmesg?
NETDEV WATCHDOG: eth0: transmit timed out e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
Check link status with these commands:
mii-tool eth0 -v ethtool eth0
Try this
modprobe e1000 Speed=100
But you might wish to have out of band management tested first!