NAME

CN-3-2-3 - Re-Registration - Binding Refresh Request

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
        |       |       |       |       |
        |<------------------------------| 13.BA
        |       |       |       |       |
        |------------------------------>| 14.Echo Request(Home Address option)
        |       |       |       |       |
        |<------------------------------| 15.Echo Reply(Type2 Routing Header)
        |       |       |       |       |
        |       |       |       |       |  Send Echo Request continuously
        |       |       |       |       |
        |<--------------|---------------| 16.BRR (*1)
        |       |       |       |       |

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).
  *Send Echo Request continuously
16. Receive Binding Refresh Request.

Packet Format
14. ICMP_Echo Request(Home Address option)
16. Binding Refresh Request

JUDGEMENT

(*1) MN receives Binding Refresh Request.
  - The Destination Address is set to the MN home address.
  - The Reserved field is set to zero.

REFERENCE

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

9.5.5 Sending Binding Refresh Requests

   If the sender knows that the Binding Cache entry is still in active
   use, it MAY send a Binding Refresh Request message to the mobile node
   in an attempt to avoid this overhead and latency due to deleting and
   recreating the Binding Cache entry.