CN-3-2-1 - Re-Registration - After the return routability procedure
Host
HA----------R2----------R1----------R0
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|---- |---- |----MN |----CN(NUT)
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Home Link Link2 Link1 Link0
(Foreign) (Foreign)
Link0 3ffe:501:ffff:100::/64 Link1 3ffe:501:ffff:101::/64 Foreign Link Link2 3ffe:501:ffff:102::/64 Foreign Link 2 Home Link 3ffe:501:ffff:104::/64 Home Link CN(NUT) 3ffe:501:ffff:100::X
Auto Configuration (InterfaceID)MN(in Link1) 3ffe:501:ffff:101::Y
Increased in each test (InterfaceID)MN care-of address MN(in Home Link) 3ffe:501:ffff:104::Y
Increased in each test (InterfaceID)MN home address R0(Link0) 3ffe:501:ffff:100::1 R1(Link1) 3ffe:501:ffff:101::1 R2(Link2) 3ffe:501:ffff:102::1 HA(Home Link) 3ffe:501:ffff:104::1
Reboot NUT (reboot.rmt)
MN R1 HA R0 CN(NUT)
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| | | |------>| 1.RA
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| | | |------>| 2.NS
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| | | |<------| 3.NA
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|-------------->|-------------->| 4.Echo Request
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|<--------------|<--------------| 5.Echo Reply
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|------------------------------>| 6.Echo Request(Home Address option)
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|<------------------------------| 7.BE(Status=1)
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|------------------------------>| 8.CoTI
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|-------------->|-------------->| 9.HoTI
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|<------------------------------| 10.CoT
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|<--------------|<--------------| 11.HoT
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|------------------------------>| 12.BU(Lifetime=420s)
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|<------------------------------| 13.BA(Lifetime=420s)
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|------------------------------>| 14.Echo Request(Home Address option)
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|<------------------------------| 15.Echo Reply(Type2 Routing Header)
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|------------------------------>| 16.CoTI
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|-------------->|-------------->| 17.HoTI
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|<------------------------------| 18.CoT
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|<--------------|<--------------| 19.HoT
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|------------------------------>| 20.BU(New Lifetime=4s)
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|<------------------------------| 21.BA(New Lifetime) (*1)
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|------------------------------>| 22.Echo Request(Home Address option)
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|<------------------------------| 23.Echo Reply(Type2 Routing Header) (*2)
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| | | | | (Expire New Lifetime)
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|------------------------------>| 24.Echo Request(Home Address option)
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|<------------------------------| 25.BE(Status=1) (*3)
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1. Send Router Advertisement. 2. Send Neighbor Solicitation. 3. Receive Neighbor Advertisement. 4. Send ICMP Echo Request. 5. Receive ICMP Echo Reply. 6. Send ICMP Echo Request(Home Address option). 7. Receive Binding Error(Status=1). 8. Send Care-of Test Init. 9. Send Home Test Init. 10. Receive Care-of Test. 11. Receive Home Test. 12. Send Binding Update(Lifetime=420s). 13. Receive Binding Acknowledgement(Lifetime=420s). 14. Send ICMP Echo Request(Home Address option). 15. Receive ICMP Echo Reply(Type2 Routing Header). 16. Send Care-of Test Init. 17. Send Home Test Init. 18. Receive Care-of Test. 19. Receive Home Test. 20. Send Binding Update(New Lifetime=4s). 21. Receive Binding Acknowledgement(New Lifetime). 22. Send ICMP Echo Request(Home Address option). 23. Receive ICMP Echo Reply(Type2 Routing Header). *Expire New Lifetime 24. Send ICMP Echo Request(Home Address option). 25. Receive Binding Error(Status=1).
Packet Format 20. Binding Update 21. Binding Acknowledgement 22. ICMP_Echo Request(Home Address option) 23. ICMP Echo Reply(Type2 Routing Header) 24. ICMP_Echo Request(Home Address option) 25. Binding Error
(*1) MN receives Binding Acknowledgement. - The Destination Address is set to the Source Address of the Binding Update (MN care-of address). - Type 2 Routing Header is included. - The Home Address field of Type 2 Routing Header is set to MN home address.
(*2) MN receives ICMP Echo Reply. (Binding Cache entry is updated.) - The Destination Address is set to the Source Address of the Binding Update (MN care-of address). - Type 2 Routing Header is included. - The Home Address field of Type 2 Routing Header is set to MN home address.
(*3) MN receives Binding Error. (The lifetime initialized by the second registration expires and the entry is deleted.) - The Destination Address is set to the Source Address of ICMP Echo Request (MN care-of address). - The Status field is set to 1. - The Home Address field is set to the value in the Home Address option in the ICMP Echo Request (MN home address).
(draft-ietf-mobileip-ipv6-24.txt)
9.5.1 Receiving Binding Updates
o If the Lifetime specified in the Binding Update is nonzero and the
specified care-of address is not equal to the home address for the
binding, then this is a request to cache a binding for the home
address. If the Home Registration (H) bit is set in the Binding
Update, the Binding Update is processed according to the procedure
specified in Section 10.3.1; otherwise, it is processed according
to the procedure specified in Section 9.5.2.
9.5.2 Requests to Cache a Binding
In this case, the receiving node SHOULD create a new entry in its Binding Cache for this home address, or update its existing Binding Cache entry for this home address, if such an entry already exists. The lifetime for the Binding Cache entry is initialized from the Lifetime field specified in the Binding Update, although this lifetime MAY be reduced by the node caching the binding; the lifetime for the Binding Cache entry MUST NOT be greater than the Lifetime value specified in the Binding Update. Any Binding Cache entry MUST be deleted after the expiration of its lifetime.