RFC 2002 (rfc2002) - Page 2 of 79
IP Mobility Support
Alternative Format: Original Text Document
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