NAME

V6LC_2_1_18_H - NA Processing, NCE State REACHABLE (Unicast NA (S=1&O=1) with the same TLLA)

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

TEST PROCEDURE

- Verify that NUT doesn't update entry's reachablity state
- Verify that NUT transmits Echo Reply in REACHABLE state
- Verify that NUT doesn't transmit any packets in REACHABLE state

    TN     NUT
    |       |
    | ----> | Echo Request
    |   <-- | NS (multicast)
    | ----> | NA
    | <---- | Echo Reply
    |       |
    | ----> | NA
    |       |
    | ----> | Echo Request
    | <---- | Echo Reply   [Judgment #1]
    |       |
    *       | Observe any packets for (DELAY_FIRST_PROBE_TIME + RETRANS_TIMER * MAX_UNICAST_SOLICIT) [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

    State: INCOMPLETE (TN) (link-local)

2. Observe NS

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

3. 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)

4. Observe Echo Reply

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

    State: REACHABLE (TN) (link-local)

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

6. Send Echo Request

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

7. Observe Echo Reply [Judgment #1]

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

8. Observe any packets for (DELAY_FIRST_PROBE_TIME + RETRANS_TIMER * MAX_UNICAST_SOLICIT) [Judgment #2]

        Node constants:
            RETRANS_TIMER         : 1,000 milliseconds
            DELAY_FIRST_PROBE_TIME: 5 seconds
            MAX_UNICAST_SOLICIT   : 3 transmissions

    State: REACHABLE (TN) (link-local)

JUDGEMENT

[Judgment #1] NUT must transmit Echo Reply to TN
[Judgment #2] NUT must not transmit any packets

---

Index	NA						Previous		New
	Source Addr	Destination Addr	R	S	O	TLL option	State	Cached LLA	State	Cached LLA
V6LC_2_1_18_A	unicast	unicast	0	0	0	none	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_B	unicast	unicast	0	0	1	none	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_C	unicast	unicast	0	1	0	none	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_D	unicast	unicast	0	1	1	none	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_E	unicast	unicast	0	0	0	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_F	unicast	unicast	0	0	1	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_G	unicast	unicast	0	1	0	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_H	unicast	unicast	0	1	1	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_I	unicast	unicast	0	0	0	different	REACHABLE	exist	STALE	unchanged
V6LC_2_1_18_J	unicast	unicast	0	0	1	different	REACHABLE	exist	STALE	updated
V6LC_2_1_18_K	unicast	unicast	0	1	0	different	REACHABLE	exist	STALE	unchanged
V6LC_2_1_18_L	unicast	unicast	0	1	1	different	REACHABLE	exist	REACHABLE	updated
V6LC_2_1_18_M	unicast	multicast	0	0	0	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_N	unicast	multicast	0	0	1	same	REACHABLE	exist	REACHABLE	unchanged
V6LC_2_1_18_O	unicast	multicast	0	0	0	different	REACHABLE	exist	STALE	unchanged
V6LC_2_1_18_P	unicast	multicast	0	0	1	different	REACHABLE	exist	STALE	updated

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