Are you sure this isn't a router problem? A number of routers have an issue wher...

rsynnott on June 9, 2014 | parent | context | favorite | on: iOS 8 randomises the MAC address while scanning fo...

Are you sure this isn't a router problem? A number of routers have an issue where they occasionally drop their table of DHCP allocations and just start again; this mostly only manifests when a new device connects.