RFC 2002 (rfc2002) - Page 2 of 79

IP Mobility Support

RFC 2002                  IP Mobility Support               October 1996


           2.3.2. Sequence Numbers and Rollover Handling  . . . . .   21
     2.4. Mobile Node Considerations  . . . . . . . . . . . . . . .   21
           2.4.1. Registration Required . . . . . . . . . . . . . .   22
           2.4.2. Move Detection  . . . . . . . . . . . . . . . . .   22
           2.4.3. Returning Home  . . . . . . . . . . . . . . . . .   24
           2.4.4. Sequence Numbers and Rollover Handling  . . . . .   24
 3. Registration                                                      24
     3.1. Registration Overview . . . . . . . . . . . . . . . . . .   25
     3.2. Authentication  . . . . . . . . . . . . . . . . . . . . .   26
     3.3. Registration Request  . . . . . . . . . . . . . . . . . .   26
     3.4. Registration Reply  . . . . . . . . . . . . . . . . . . .   29
     3.5. Registration Extensions . . . . . . . . . . . . . . . . .   32
           3.5.1. Computing Authentication Extension Values . . . .   32
           3.5.2. Mobile-Home Authentication Extension  . . . . . .   33
           3.5.3. Mobile-Foreign Authentication Extension . . . . .   33
           3.5.4. Foreign-Home Authentication Extension . . . . . .   34
     3.6. Mobile Node Considerations  . . . . . . . . . . . . . . .   34
           3.6.1. Sending Registration Requests . . . . . . . . . .   36
           3.6.2. Receiving Registration Replies  . . . . . . . . .   40
           3.6.3. Registration Retransmission . . . . . . . . . . .   42
     3.7. Foreign Agent Considerations  . . . . . . . . . . . . . .   43
           3.7.1. Configuration and Registration Tables . . . . . .   44
           3.7.2. Receiving Registration Requests . . . . . . . . .   44
           3.7.3. Receiving Registration Replies  . . . . . . . . .   47
     3.8. Home Agent Considerations . . . . . . . . . . . . . . . .   49
           3.8.1. Configuration and Registration Tables . . . . . .   49
           3.8.2. Receiving Registration Requests . . . . . . . . .   49
           3.8.3. Sending Registration Replies  . . . . . . . . . .   53
 4. Routing Considerations                                            55
     4.1. Encapsulation Types . . . . . . . . . . . . . . . . . . .   56
     4.2. Unicast Datagram Routing  . . . . . . . . . . . . . . . .   56
           4.2.1. Mobile Node Considerations  . . . . . . . . . . .   56
           4.2.2. Foreign Agent Considerations  . . . . . . . . . .   57
           4.2.3. Home Agent Considerations . . . . . . . . . . . .   58
     4.3. Broadcast Datagrams . . . . . . . . . . . . . . . . . . .   59
     4.4. Multicast Datagram Routing  . . . . . . . . . . . . . . .   60
     4.5. Mobile Routers  . . . . . . . . . . . . . . . . . . . . .   61
     4.6. ARP, Proxy ARP, and Gratuitous ARP  . . . . . . . . . . .   62
 5. Security Considerations                                           66
     5.1. Message Authentication Codes  . . . . . . . . . . . . . .   66
     5.2. Areas of Security Concern in this Protocol  . . . . . . .   66
     5.3. Key Management  . . . . . . . . . . . . . . . . . . . . .   67
     5.4. Picking Good Random Numbers . . . . . . . . . . . . . . .   67
     5.5. Privacy . . . . . . . . . . . . . . . . . . . . . . . . .   67
     5.6. Replay Protection for Registration Requests . . . . . . .   68
           5.6.1. Replay Protection using Timestamps  . . . . . . .   68
           5.6.2. Replay Protection using Nonces  . . . . . . . . .   69
 6. Acknowledgments                                                   71



Perkins                     Standards Track