Setup network on Hyper-V virtual CentOS 6

Use system-config-network-tui and set up the card. If you perform a failover, you must connect the card in Hyper-V and then configure the card again.

If it does not come up, look in /etc/udev/rules.d/70-persistant-net.rules and see which “ethX” interface has the correct mac address. Either rename your ifcfg-ethx file in /etc/sysconfig/network-scripts or use system-config-network-tui to setup the correct “ethX” interface and restart the network.