NAME

CN-3-1-2 - Registration - Same Alternate Care-of Address as Source Address

TARGET

Host

TOPOLOGY

       HA----------R2----------R1----------R0
       |           |           |           |
       |           |           |           |
       |----       |----       |----MN     |----CN(NUT)
       |           |           |           |
       |           |           |           |
   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

INITIALIZATION

Reboot NUT (reboot.rmt)

TEST PROCEDURE

       MN      R1      HA      R0     CN(NUT) 
        |       |       |       |       |
        |       |       |       |------>| 1.RA
        |       |       |       |       |
        |       |       |       |------>| 2.NS
        |       |       |       |       |
        |       |       |       |<------| 3.NA
        |       |       |       |       |
        |-------------->|-------------->| 4.Echo Request
        |       |       |       |       |
        |<--------------|<--------------| 5.Echo Reply
        |       |       |       |       |
        |------------------------------>| 6.Echo Request(Home Address option)
        |       |       |       |       |
        |<------------------------------| 7.BE(Status=1)
        |       |       |       |       |
        |------------------------------>| 8.CoTI
        |       |       |       |       |
        |-------------->|-------------->| 9.HoTI
        |       |       |       |       |
        |<------------------------------| 10.CoT
        |       |       |       |       |
        |<--------------|<--------------| 11.HoT
        |       |       |       |       |
        |------------------------------>| 12.BU(Alternate Care-of Address=Source Address)
        |       |       |       |       |
        |<------------------------------| 13.BA(Status=0) (*1)
        |       |       |       |       |
        |------------------------------>| 14.Echo Request(Home Address option)
        |       |       |       |       |
        |<------------------------------| 15.Echo Reply(Type2 Routing Header) (*2)
        |       |       |       |       |

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(Alternate Care-of Address=Source Address).
13. Receive Binding Acknowledgement.
14. Send ICMP Echo Request(Home Address option).
15. Receive ICMP Echo Reply(Type2 Routing Header).

Packet Format
12. Binding Update(Alternate Care-of Address option)
      IPv6 header
      Destination Options header
         Home Address option
      Mobility header
         Binding Update
            Alternate Care-of Address option
            Nonce Indices option
            Binding Authorization Data option
13. Binding Acknowledgement
14. ICMP_Echo Request(Home Address option)
15. ICMP Echo Reply(Type2 Routing Header)

JUDGEMENT

(*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 created.)
  - 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.

REFERENCE

(draft-ietf-mobileip-ipv6-24.txt)

9.5.1 Receiving Binding Updates

   The specified care-of address MUST be determined as follows:

   o  If the Alternate Care-of Address option is present, the care-of
      address is the address in that option.

9.5.1 Receiving Binding Updates

   When the Home Registration (H) bit is not set, the following are also
   required:

      (snip)

   o  The Binding Authorization Data mobility option MUST be present,
      and its contents MUST satisfy rules presented in Section 5.2.6.
      Note that a care-of address different from the Source Address MAY
      have been specified by including an Alternate Care-of Address
      mobility option in the Binding Update.  When such a message is
      received and the return routability procedure is used as an
      authorization method, the correspondent node MUST verify the
      authenticator by using the address within the Alternate Care-of
      Address in the calculations.

9.5.4 Sending Binding Acknowledgements

   If the Source Address field of the IPv6 header that carried the
   Binding Update does not contain a unicast address, the Binding
   Acknowledgement MUST NOT be sent, and the Binding Update packet MUST
   be silently discarded.  Otherwise, the acknowledgement MUST be sent
   to the Source Address.  Unlike the treatment of regular packets, this
   addressing procedure does not use information from the Binding Cache.
   However, a routing header is needed in some cases.  If the Source
   Address is the home address of the mobile node, i.e., the Binding
   Update did not contain a Home Address destination option, then the
   Binding Acknowledgement MUST be sent to that address, and the routing
   header MUST NOT be used.  Otherwise, the Binding Acknowledgement MUST
   be sent using a type 2 routing header which contains the mobile
   node's home address.