NAME

MN-2-1-1-2-006 - Don't start the return routability procedure (when receiving the packet directly from known node)


TARGET

Host


TOPOLOGY

                    
                                  |
                                  R       CN0
                                  |        |
                     -----+-------+--------+---------------- LinkZ
                          |
                          R2                      NUTY
                          |                         |
                     -----+-------+-----------------+------- LinkY
                                  |
                                  R1              NUTX
                                  |                 |
                     -----+-------+-----------------+------- LinkX
                          |
                         HA0             Node0    NUT0
                          |               |         |
    ----------------------+---------------+---------+------- 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:a0a0  
Node0(Link0) 3ffe:501:ffff:100:200:ff:fe00:a3a3  
R1(LinkX) 3ffe:501:ffff:102:200:ff:fe00:a4a4  
R2(LinkY) 3ffe:501:ffff:103:200:ff:fe00:a6a6  
CN0(LinkZ) 3ffe:501:ffff:104:200:ff:fe00:a8a8  


INITIALIZATION

 1. Selection Option
    - Route Optimization support: YES
                    
 2. Position of Mobile Node
                    
       HA0     NUT0     R1      R2      CN0
        |       |       |       |        |
        | ----> |       |       |        |  1.Router Advertisement
        |       |       |       |        |
        |      NUTX     |       |        |
        |       |       |       |        |
        |       | <---- |       |        |  2.Router Advertisement
        |       |       |       |        |
        | <---- |       |       |        |  3.Neighbor Solicitations
        |       |       |       |        |  4.(no reply:3 seconds)
        |       |       |       |        |
        | <---- |       |       |        |  5.Binding Update
        | ----> |       |       |        |  6.Binding Acknowledgement
        |       |       |       |        |
                    
        1. Send Router Advertisement. (HA0 -> HA0_allnode_multi)
        2. Send Router Advertisement. (R1 -> R1_allnode_multi)
        3. Receive Neighbor Solicitations. (NUT0 -> HA0)
        4. (no reply)
            # Wait during a maximum of 3 seconds(RFC2461).
        5. Receive Binding Update to HA0. (NUTX -> HA0)
        6. Send Binding Acknowledgement. (HA0 -> NUTX)


TEST PROCEDURE

                    
       HA0     NUTX     R1      R2      CN0
        |       |       |       |        |
        | ====> | <--------------------- |  1.ICMP Echo Request
        |       |       |       |        |
        | <==== | ---------------------> |  2.Home Test Init
        |       | ---------------------> |  3.Care-of Test Init
        |       | <--------------------- |  4.Care-of Test
        | ====> | <--------------------- |  5.Home Test
        |       |       |       |        |
        | <==== | ---------------------> |  6.ICMP Echo Reply
        |       | ---------------------> |  7.Binding Update
        |       | ---------------------> |  8.ICMP Echo Reply
        |       |       |       |        |
        |       | <--------------------- |  9.ICMP Echo Request
        |       | ---------------------> | 10.ICMP Echo Reply (*1)
        |       |       |       |        |
                    
        1. Send ICMP Echo Request. (out: HA0 -> NUTX, in: CN0 -> NUT0)
        2. Receive Home Test Init. (out: NUTX -> HA0, in: NUT0 -> CN0)
        3. Receive Care-of Test Init. (NUTX -> CN0)
        4. Send Care-of Test. (CN0 -> NUTX)
        5. Send Home Test. (out: HA0 -> NUTX, in: CN0 -> NUT0)
        6. Receive ICMP Echo Reply or [8]. (out: NUTX -> HA0, in: NUT0 -> CN0)
        7. Receive Binding Update to CN0. (NUTX -> CN0)
        8. [6] or Receive ICMP Echo Reply. (NUTX -> CN0)
            # Home Address destination option is included.
        9. Send ICMP Echo Request. (CN0 -> NUTX)
            # Type 2 routing header is included.
       10. Receive ICMP Echo Reply. (NUTX -> CN0).
            # Home Address destination option is included.
                    
        Packet Format is:
          9.ICMP Echo Request Data is:
            IPv6 header (source = correspomdent node,
                         destination = care-of address)
            Routing header (type 2)
                 home address
            ICMPv6 Echo Request
                    
         10.ICMP Echo Reply Data is:
            IPv6 header (source = care-of address,
                         destination = correspomdent node)
            Destination Options header
                 Home Address option (home address)
            ICMPv6 Echo Reply
                    


JUDGEMENT

 (*1) PASS: CN0 receives the ICMP Echo Reply by Route Optimization.
 (*1) PASS: HA0 does not receive the Home Test Init and CN0 does not receive the Care-of Test Init.


REFERENCE

                    
(draft-ietf-mobileip-ipv6-24.txt)
                    
11.6 Return Routability Procedure
                    
   This section defines the rules that the mobile node must follow when
   performing the return routability procedure.  Section 11.7.2
   describes the rules when the return routability procedure needs to be
   initiated.
                    
                    
11.7.2 Correspondent Registration
                    
(snip)
                    
   For nodes that do not appear in the mobile node's Binding Update
   List, the mobile node MAY initiate a correspondent registration at
   any time after sending the Binding Update to its home agent.
   Considerations regarding when (and if) to initiate the procedure
   depend on the specific movement and traffic patterns of the mobile
   node and are outside the scope of this document.
                    
   In addition, the mobile node MAY initiate the procedure in response
   to receiving a packet that meets all of the following tests:
                    
   o  The packet was tunneled using IPv6 encapsulation.
                    
                    
11.3.1 Sending Packets While Away from Home
                    
(snip)
                    
   Route Optimization
                    
      This manner of delivering packets does not require going through
      the home network, and typically will enable faster and more
      reliable transmission.
                    
      The mobile node needs to ensure that there exists a Binding Cache
      entry for its home address so that the correspondent node can
      process the packet (Section 9.3.1 specifies the rules for Home
      Address Destination Option Processing at a correspondent node).
      The mobile node SHOULD examine its Binding Update List for an
      entry which fulfills the following conditions: