MN-4-2-1-1-012 - Receiving solicited MPA from unknown HA
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
- Mobile Prefix Solicitation retransmit : YES
2. Position of Mobile Node
- none
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
| | | | |
| ----> | | | | 7.Mobile Prefix Advertisement
| | | | |
| <---- | | | | 8.Mobile Prefix Solicitetion
| ----> | | | | 9.Mobile Prefix Advertisement(*1)
| | | | |
| <---- | | | | 10.Mobile Prefix Solicitetion
| | | | |
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. (NUTX -> HA0)
6. Send Binding Acknowledgement. (HA0 -> NUTX)
7. Send unsolicited Mobile Prefix Advertisement. (HA0 -> NUTX)
# The Identifier field is set to the random value.
8. Receive Mobile Prefix Solicitation. (NUTX -> HA0)
9. Send Mobile Prefix Advertisement. (HA0 -> NUTX)
# The Source Address is not set to HA address.
10. Receive Mobile Prefix Solicitation. (NUTX -> HA0)
Packet Format is:
9.Mobile Prefix Advertisement
(*1) PASS: HA0 receives the retransmitting of Mobile Prefix Solicitation message.
(draft-ietf-mobileip-ipv6-24.txt)
11.4.3. Receiving Mobile Prefix Advertisements
(snip)
When a mobile node receives a Mobile Prefix Advertisement, it MUST
validate it according to the following test:
o The Source Address of the IP packet carrying the Mobile Prefix
Advertisement is the same as the home agent address to which the
mobile node last sent an accepted home registration Binding Update
to register its primary care-of address. Otherwise, if no such
registrations have been made, it SHOULD be the mobile node's
stored home agent address, if one exists. Otherwise, if the
mobile node has not yet discovered its home agent's address, it
MUST NOT accept Mobile Prefix Advertisements.
o The packet MUST have a type 2 routing header and SHOULD be
protected by an IPsec header as described in Section 5.4 and
Section 6.8.
o If the ICMP Identifier value matches the ICMP Identifier value of
the most recently sent Mobile Prefix Solicitation and no other
advertisement has yet been received for this value, then the
advertisement is considered to be solicited and will be processed
further.
Otherwise, the advertisement is unsolicited, and MUST be silently
discarded. In this case the mobile node SHOULD send a Mobile
Prefix Solicitation.
Any received Mobile Prefix Advertisement not meeting these tests MUST
be silently discarded.