NAME

V6LC_2_1_12_C - NS Processing, NCE State STALE (Multicast NS with the same SLLA)

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 valid NA in STALE state
- Verify that NUT transmits valid NSs in PROBE state

    TN     NUT
    |       |
    | ----> | Echo Request
    |   <-- | NS (multicast)
    | ----> | NA
    | <---- | Echo Reply
    |       |
    | ----> | Echo Request
    | <---- | Echo Reply
    |       |
    *       | Wait (REACHABLE_TIME * MAX_RANDOM_FACTOR)
    |       |
    | ----> | NS (unicast)
    | ----> | Echo Request
    | <---- | NA           [Judgment #1]
    | <---- | Echo Reply
    |       |
    *       | Wait (DELAY_FIRST_PROBE_TIME)
    |       |
    | <---- | NS (unicast) [Judgment #2]
    | <---- | NS (unicast)
    | <---- | NS (unicast)
    |       |
    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 Echo Request

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

6. Observe Echo Reply

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

    State: REACHABLE (TN) (link-local)

7. Wait (REACHABLE_TIME * MAX_RANDOM_FACTOR)

        Node constants:
            REACHABLE_TIME   : 30,000 milliseconds
            MAX_RANDOM_FACTOR: 1.5

    State: STALE (TN) (link-local)

8. Send NS

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

9. Send Echo Request

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

10. Observe NA [Judgment #1]

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

11. Observe Echo Reply

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

    State: DELAY (TN) (link-local)

12. Wait (DELAY_FIRST_PROBE_TIME)

        Node constants:
            DELAY_FIRST_PROBE_TIME: 5 seconds

    State: PROBE (TN) (link-local)

13. Observe MAX_UNICAST_SOLICIT NSs [Judgment #2]

        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)

JUDGEMENT

[Judgment #1] NUT must transmit NA to TN
[Judgment #2] NUT must transmit NS to TN

---

Index	NS			Previous		New
	Source Addr	Destination Addr	SLL option	State	Cached LLA	State	Cached LLA
V6LC_2_1_12_A	unicast	unicast	same	STALE	exist	STALE	unchanged
V6LC_2_1_12_B	unicast	multicast	same	STALE	exist	STALE	unchanged
V6LC_2_1_12_C	unicast	unicast	different	STALE	exist	STALE	updated
V6LC_2_1_12_D	unicast	multicast	different	STALE	exist	STALE	updated

CLEANUP

none

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6