NAME

V6LC_2_1_2_A - Resolution Wait Queue (Single Queue)

TARGET

Host/Router

TOPOLOGY

    TN     NUT
    |       |
----+-------+--- Link0

Link0	link-local	fe80::/64
TN	link-local	fe80::<TnDef.Link0_addr>
	ether	<TnDef.Link0_addr>
NUT	link-local	fe80::<NutDef.Link0_addr>
	ether	<NutDef.Link0_addr>

SETUP

none

INITIALIZATION

none

TEST PROCEDURE

- Verify that NUT transmits valid NSs in INCOMPLETE state
- Verify that NUT can transmit Echo Reply after address resolution
- Verify that NUT replaces the oldest entry and the new arrival packet, when a queue overflows.

    TN     NUT
    |       |
    | ----> | Echo Request (SN=0)
    | ----> | Echo Request (SN=1)
    | ----> | Echo Request (SN=2)
    |       |
    |   <-- | NS (multicast)      [Judgment #1]
    | ----> | NA
    |       |
    | <---- | Echo Reply   (SN=2) [Judgment #2]
    |       |
    V       V

    State: NONE (TN) (link-local)

1. Send Echo Request

        IPv6 header
            source          = TN  (link-local)
            destination     = NUT (link-local)
        Echo Request
            sequence number = 0

    State: INCOMPLETE (TN) (link-local)

2. Send Echo Request

        IPv6 header
            source          = TN  (link-local)
            destination     = NUT (link-local)
        Echo Request
            sequence number = 1

3. Send Echo Request

        IPv6 header
            source          = TN  (link-local)
            destination     = NUT (link-local)
        Echo Request
            sequence number = 2

4. Observe NS [Judgment #1]

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

5. Send NA

        IPv6 header
            hop limit   = 255
            source      = TN  (link-local)
            destination = NUT (link-local)
        NA
            R           = 0
            S           = 1
            O           = 1
            target      = TN  (link-local)
        TLL option

    State: REACHABLE (TN) (link-local)

6. Observe Echo Reply [Judgment #2]

        IPv6 header
            source          = NUT (link-local)
            destination     = TN  (link-local)
        Echo Reply
            sequence number = 2

JUDGEMENT

[Judgment #1] NUT must transmit NSs to TN
[Judgment #2] NUT must transmit Echo Reply to TN

CLEANUP

- Set neighbor cache state for TN to NONE

    TN     NUT
    |       |
    | ----> | NS (unicast) (different cached address)
    | <---- | NA
    |       |
    *       | Wait (DELAY_FIRST_PROBE_TIME)
    |       |
    | <---- | NS (unicast)
    | <---- | NS (unicast)
    | <---- | NS (unicast)
    |       |
    V       V

    State: REACHABLE (TN) (link-local)

1. Send NS

        IPv6 header
            hop limit   = 255
            source      = TN  (link-local)
            destination = NUT (link-local)
        NS
            target      = NUT (link-local)
        SLL option
            address     = H0  (ether)

    State: STALE (TN) (link-local)

2. Observe NA

        IPv6 header
            source      = NUT (link-local)
            destination = TN  (link-local)
        NA
            R           = 0   (If NUT is Host)
                        = 1   (If NUT is Router)
            S           = 1
            O           = 1
            target      = NUT (link-local)
        TLL option

    State: DELAY (TN) (link-local)

3. Wait (DELAY_FIRST_PROBE_TIME)

        Node constants:
            DELAY_FIRST_PROBE_TIME: 5 seconds

    State: PROBE (TN) (link-local)

4. Observe MAX_UNICAST_SOLICIT NSs

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

        Node constants:
            MAX_UNICAST_SOLICIT: 3 transmissions

    State: NONE (TN) (link-local)

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6