NAME

v6LC_2_3_11_C - Neighbor Cache Updated from State INCOMPLETE (TLLA Option, Redirected Packet Option, Link-layer Address Updated)

TARGET

Host

TOPOLOGY

                   TN2
                    |
----+-------+-------+--- LinkY
    |       |
   TR1     TR2     HUT
    |       |       |
----+-------+-------+--- Link0

Link0 global 3ffe:501:ffff:100::/64
link-local fe80::/64
LinkY global 3ffe:501:ffff::/64
link-local fe80::/64
TR1 global 3ffe:501:ffff:100:200:ff:fe00:a0a0
link-local fe80::200:ff:fe00:a0a0
ether 00:00:00:00:a0:a0
TR2 global 3ffe:501:ffff:100:200:ff:fe00:a1a1
link-local fe80::200:ff:fe00:a1a1
ether 00:00:00:00:a1:a1
HUT global 3ffe:501:ffff:100::<NutDef.Link0_addr>
link-local fe80::<NutDef.Link0_addr>
ether <NutDef.Link0_addr>
TN2 global 3ffe:501:ffff::<TnDef.Link0_addr>
link-local fe80::<TnDef.Link0_addr>
ether <TnDef.Link0_addr>

SETUP

This minimal setup procedure provides the NUT with a default router TR1, a global prefix, and ensures that the NUT can communicate with TR1. 
   TR1     HUT
    |       |
    | -->   | RA
    |       |
    *       | Wait (MAX_RTR_SOLICITATION_DELAY + RetransTimer * DupAddrDetectTransmits)
    |       |
    | ----> | Echo Request
    |   <-- | NS
    | ----> | NA
    | <---- | Echo Reply
    |       |
    V       V


1. Send RA

        IPv6 header
            hop limit          = 255
            source             = TR1 (link-local)
            destination        = all-nodes multicast address
        RA
            cur hop limit      = 64
            M                  = 0
            O                  = 0
            router lifetime    = 1800
            reachable time     = 0
            retrans timer      = 0
        Prefix Information option
            prefix length      = 64
            L                  = 1
            A                  = 1
            valid Lifetime     = 2592000
            preferred lifetime = 604800
            prefix             = 3ffe:501:ffff:100::

2.  Wait (MAX_RTR_SOLICITATION_DELAY + RetransTimer * DupAddrDetectTransmits)

        Host constants:
            MAX_RTR_SOLICITATION_DELAY: 1 second

        Node constants:
            RETRANS_TIMER             : 1,000 milliseconds

        Host Variables:
            RetransTimer
                Default               : RETRANS_TIMER milliseconds

        Node Variables:
            DupAddrDetectTransmits
                Default               : 1

3. Send Echo Request

        IPv6 header
            source      = TR1 (link-local)
            destination = HUT (link-local)
        Echo Request

4. Observe NS

        IPv6 header
            hop limit   = 255
            source      = HUT (link-local)
            destination = TR1 (solicited-node multicast address)
        NS
            target      = TR1 (link-local)
        SLL option

5. Send NA

        IPv6 header
            hop limit   = 255
            source      = TR1 (link-local)
            destination = HUT (link-local)
        NA
            R           = 1
            S           = 1
            O           = 1
            target      = TR1 (link-local)
        TLL option

6. Observe Echo Reply

        IPv6 header
            source      = HUT (link-local)
            destination = TR1 (link-local)
        Echo Reply

TEST PROCEDURE

Verify that a host properly updates its Neighbor Cache entry upon receipt of a valid ICMP Redirect Message. 
   TR1     TR2     HUT
    |       |       |
    |       | ----> | Echo Request
    |       |   <-- | NS           [Judgment #1]
    | ------------> | Redirect
    |       | <---- | Echo Reply   [Judgment #2]
    |       |       |
    |       *       | Wait (DELAY_FIRST_PROBE_TIME)
    |       |       |
    |       | <---- | NS           [Judgment #3]
    |       | <---- | NS
    |       | <---- | NS
    |       |       |
    V       V       V


1. Send Echo Request

        IPv6 header
            source      = TR2 (link-local)
            destination = HUT (link-local)
        Echo Request

2. Observe NS

        IPv6 header
            hop limit   = 255
            source      = HUT (link-local)
            destination = TR2 (solicited-node multicast address)
        NS
            target      = TR2 (link-local)
        SLL option

3. Send Redirect

        IPv6 header
            hop limit   = 255
            source      = TR1 (link-local)
            destination = HUT (global)
        Redirect
            target      = TR2 (link-local)
            destination = TN2 (global)
        TLL option
        Redirected Header option

4. Observe Echo Reply

        IPv6 header
            source      = HUT (link-local)
            destination = TN2 (link-local)
        Echo Reply

5. Wait (DELAY_FIRST_PROBE_TIME)

        Node constants:
            DELAY_FIRST_PROBE_TIME: 5 seconds

6. Observe MAX_UNICAST_SOLICIT NSs

        IPv6 header
            hop limit   = 255
            source      = HUT (link-local)
            destination = TR2 (link-local)
        NS
            target      = TR2 (link-local)
        SLL option

        Node constants:
            MAX_UNICAST_SOLICIT: 3 transmissions

JUDGEMENT

[Judgment #1] The HUT should send a multicast Neighbor Solicitation for TR2, indicating the HUT has an NCE for TR2 in state INCOMPLETE.
[Judgment #2] Because the HUT's NCE for TR2 is in state STALE, the HUT should send an Echo Reply to TR2 using the new Link-Layer address and enter state DELAY.
[Judgment #3] After DELAY_FIRST_PROBE_TIME, the HUT should send a unicast Neighbor Solicitation to TR2.

CLEANUP

The Cleanup procedure should cause the NUT to transition Neighbor Cache entries created in this test to state INCOMPLETE and remove any entries from its Default Router and Prefix Lists. 
   TR1     HUT
    |       |
    | -->   | RA
    |       |
    | -->   | NA
    |       |
    | ----> | Echo Request
    | <---- | Echo Reply
    |       |
    *       | Wait (DELAY_FIRST_PROBE_TIME)
    |       |
    | <---- | NS
    | <---- | NS
    | <---- | NS
    |       |
    V       V


1. Send RA

        IPv6 header
            hop limit          = 255
            source             = TR1 (link-local)
            destination        = all-nodes multicast address
        RA
            cur hop limit      = 64
            M                  = 0
            O                  = 0
            router lifetime    = 1800
            reachable time     = 0
            retrans timer      = 0
        Prefix Information option
            prefix length      = 64
            L                  = 1
            A                  = 1
            valid Lifetime     = 0
            preferred lifetime = 0
            prefix             = 3ffe:501:ffff:100::

2. Send NA w/ TLL (diff)

        IPv6 header
            hop limit   = 255
            source      = TR1 (link-local)
            destination = all-nodes multicast address
        NA
            R           = 1
            S           = 0
            O           = 1
            target      = TR1 (link-local)
        TLL option
            address     = TRX (ether)

3. Send Echo Request

        IPv6 header
            source      = TR1 (link-local)
            destination = HUT (link-local)
        Echo Request

4. Observe Echo Reply

        IPv6 header
            source      = HUT (link-local)
            destination = TR1 (link-local)
        Echo Reply

5. Wait (DELAY_FIRST_PROBE_TIME)

        Node constants:
            DELAY_FIRST_PROBE_TIME: 5 seconds

7. Observe MAX_UNICAST_SOLICIT NSs

        IPv6 header
            hop limit   = 255
            source      = HUT (link-local)
            destination = TR1 (link-local)
        NS
            target      = TR1 (link-local)
        SLL option

        Node constants:
            MAX_UNICAST_SOLICIT: 3 transmissions

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6