MN-2-1-2-2-001 - Sending CoTI (when receiving the tunneled packet from unknown node)
Host
|
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 |
|
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)
HA0 NUTX R1 R2 CN0
| | | | |
| ====> | <--------------------- | 1.ICMP Echo Request
| | | | |
| <==== | ---------------------> | 2.Home Test Init
| | ---------------------> | 3.Care-of Test Init (*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)
Packet Format is:
3.Care-of Test Init
(*1) PASS: CN0 receives the Care-of Test Init.
Then, check whether this packet fills all of the following.
- The Source Address is set to primary care-of address.
- The Destination Address is set to The Source Address(inner) packet
of ICMP Echo Request [1].
(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.
o The Destination Address in the tunnel (outer) IPv6 header is equal
to any of the mobile node's care-of addresses.
o The Destination Address in the original (inner) IPv6 header is
equal to one of the mobile node's home addresses.
o The Source Address in the tunnel (outer) IPv6 header differs from
the Source Address in the original (inner) IPv6 header.
o The packet does not contain a Home Test, Home Test Init, Care-of
Test, or Care-of Test Init message.
If a mobile node has multiple home addresses, it becomes important to
select the right home address to use in the correspondent
registration. The used home address MUST be the Destination Address
of the original (inner) packet.
The peer address used in the procedure MUST be determined as follows:
o If a Home Address destination option is present in the original
(inner) packet, the address from this option is used.
o Otherwise, the Source Address in the original (inner) IPv6 header
of the packet is used.