opscode/ohai — pull request #122 by tas50 (2013-01-25 19:47:56+00:00)
Title: Mac address based identifier for Rackspace falsely identifies systems on...

... Cisco

This causes a lot of problems in cookbooks that try to use the private
IP if the equipment is on rackspace. They end up failing if there is
no eth1 on your hardware/VMs connected to Cisco networking equipment.