Disable guest DHCP with Hyper-V DHCP Guard
If you have any amount of test or development infrastructure, a rogue DHCP server has surely shown up. While I’ve been lucky to never have it show up on a production segment, I’ve seen many a network administrator track one down and shut down a port to try to find the offending virtual machine.
As it turns out, virtual machines can be hard to find as they have different MAC address formats and may move around to different segments if on a laptop or host with migration technology enabled.
