Overview Interface Identification Number (IFID) This randomly generated number is used to distinguish each interface on MN Interface Priority (IFPRI) Priority value is used to select the primary CoA Care-of Address Information sub-option The sub-option used in BU to notify IFID and IFPRI to either HA or CNs MN CN CoA1 IFID1 CoA2 IFID2 Binding Cache HoA + IFID1 – CoA1 HoA + IFID2-CoA2 VoIP, DVTS smtp, pop |