OpenBSD's Common Address Redundancy Protocol

Jessie writes "OpenBSD just gained high availability functionality in the form of a new protocol named CARP, the Common Address Redundancy Protocol. This feature was a long time in the coming due to Cisco's patent on VRRP, requiring the development of something completely new and more secure. This article on KernelTrap offers details on OpenBSD's impressive new protocol, from how it works to how it got its name."