In another embodiment, {HEAD ~ a device} in the first routing domain migrates from the first routing domain to {TAIL ~ a second routing domain}, and determines its new IP address 
In another embodiment , { HEAD ~ a device } in the first routing domain migrates from the first routing domain to { TAIL ~ a second routing domain } , and determines its new IP address
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH