NAME

ReturningHome - NUT sends Binding Update to HA when returning home

TARGET

Host

SYNOPSIS

ReturningHome.seq [-tooloption ...] -pkt MN_Common.def

-tooloption: v6eval tool option

TOPOLOGY

                                      |
                                      R       TN
                                      |       |
                              --------+-------+--------------- LinkZ

                                      |
                                      R2             NUT2
                                      |               |
                              --------+---------------+------- LinkY

                                      |       |
                                      HA2     R1     NUT1
                                      |       |       |
                              --------+-------+-------+------- LinkX

                          |           |
             NUT0        HA1          HA0
              |           |           |
Link0 --------+-----------+-----------+-----------------------

Link0	3ffe:501:ffff:100::/64	home link
LinkX	3ffe:501:ffff:102::/64
LinkY	3ffe:501:ffff:103::/64
LinkZ	3ffe:501:ffff:104::/64
HA0(Link0)	3ffe:501:ffff:100:200:ff:fe00:a1a1/64
HA1(Link0)	3ffe:501:ffff:100:200:ff:fe00:a2a2/64
HA2(LinkX)	3ffe:501:ffff:102:200:ff:fe00:a3a3
R1(LinkX)	3ffe:501:ffff:102:200:ff:fe00:a4a4
R2(LinkY)	3ffe:501:ffff:103:200:ff:fe00:a5a5
TN(LinkZ)	3ffe:501:ffff:104:200:ff:fe00:a6a6

TEST PROCEDURE

NUT sends Binding Update to HA when returning home

        HA0    NUT1     R1
        |       |       |
        |       | <---- | RA
        |       |       |
        | <---- |       | Binding Update (*1)
        | ----> |       | Binding Acknowledgement
        |       |       |
        |      NUT0     |
        |       |       |
        | ----> |       | RA
        |       |       |
        | <---- |       | Binding Update (*2)
        | ----> |       | Binding Acknowledgement
        |       |       |

JUDGEMENT

(*1) PASS: HA0 receives Binding Update from NUT1

(*2) PASS: HA0 receives Binding Update from NUT0

REFERENCE

draft-ietf-mobileip-ipv6-20.txt

11.5.4 Returning Home

   A mobile node detects that it has returned to its home link through
   the movement detection algorithm in use (Section 11.5.1), when the
   mobile node detects that its home subnet prefix is again on-link.
   The mobile node SHOULD then send a Binding Update to its home agent,
   to instruct its home agent to no longer intercept or tunnel packets
   for it.  In this home registration, the mobile node MUST set the
   Acknowledge (A) and Home Registration (H) bits, set the Lifetime
   field to zero, and set the care-of address for the binding to the
   mobile node's own home address.  The mobile node MUST use its home
   address as the source address in the Binding Update.

   When sending this Binding Update to its home agent, the mobile node
   must be careful in how it uses Neighbor Solicitation [12] (if needed)
   to learn the home agent's link-layer address, since the home agent
   will be currently configured to intercept packets to the mobile
   node's home address for Duplicate Address Detection (DAD).  In
   particular, the mobile node is unable to use its home address as the
   Source Address in the Neighbor Solicitation until the home agent
   stops defending the home address.