CN-4-3-2 - Care-of Nonce Index timeout - De-Registration from the foreign link
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
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|<------------------------------| 13.BA
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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.CoT
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| | | | | Expire MAX_NONCE_LIFE(240s)
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|-------------->|-------------->| 18.HoTI
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|<--------------|<--------------| 19.HoT
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|------------------------------>| 20.BU(Lifetime=0,Care-of Nonce Index=Received in 17.)
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|<------------------------------| 21.BA(Status=0) (*1)
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|------------------------------>| 22.Echo Request(Home Address option)
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|<------------------------------| 23.BE(Status=1) (*2)
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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. 13. Receive Binding Acknowledgement. 14. Send ICMP Echo Request(Home Address option). 15. Receive ICMP Echo Reply(Type2 Routing Header). 16. Send Care-of Test Init. 17. Receive Care-of Test. *Expire MAX_NONCE_LIFE(240s) 18. Send Home Test Init. 19. Receive Home Test. 20. Send Binding Update(Lifetime=0,Care-of Nonce Index=Received in 17). 21. Receive Binding Acknowledgement(Status=0). 22. Send ICMP Echo Request(Home Address option). 23. Receive Binding Error(Status=1).
Packet Format 20. Binding Update 21. Binding Acknowledgement 22. ICMP_Echo Request(Home Address option) 23. Binding Error
(*1) MN receives Binding Acknowledgement. - The Destination Address is set to the Source Address of the Binding Update (MN care-of address). - The Status field is set to 0. - Binding Authorization Data option is included. - Authenticator field of Binding Authorization Data option has the valid value.
(*2) MN receives Binding Error. (Binding Cache 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.
(draft-ietf-mobileip-ipv6-24.txt)
9.5.1 Receiving Binding Updates
o A Nonce Indices mobility option MUST be present, and the Home and
Care-of Nonce Index values in this option MUST be recent enough to
be recognized by the correspondent node. (Care-of Nonce Index
values are not inspected for requests to delete a binding.)
(snip)
o If the Lifetime specified in the Binding Update is zero or the
specified care-of address matches the home address for the
binding, then this is a request to delete the cached binding for
the home address. In this case, the Binding Update MUST include a
valid home nonce index, and the care-of nonce index MUST be
ignored by the correspondent node. The generation of the binding
management key depends then exclusively on the home keygen token
(Section 5.2.5). If the Home Registration (H) bit is set in the
Binding Update, the Binding Update is processed according to the
procedure specified in Section 10.3.2; otherwise, it is processed
according to the procedure specified in Section 9.5.3.