post your /etc/network/interfaces
if this is after a vmotion or what not, a dmesg might also be appropriate.
interfaces file looks ok:
###
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.200.11
netmask 255.255.255.0
network 192.168.200.0
broadcast 192.168.200.255
gateway 192.168.200.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 192.168.200.1
####
i will post dmesg output later. sorry for that.
Regards
------------
Roman