NAME

V6LC_2_1_1_D - On-Link Determination (Global Address, On-link Prefix does not cover TN2)

TARGET

Host

TOPOLOGY

           TN2
            |
----+-------+--- Link1
    |
   TN1     NUT
    |       |
----+-------+--- Link0

Link0	link-local	fe80::/64
TN	global	3ffe:501:ffff:100::<TnDef.Link0_addr>
	link-local	fe80::<TnDef.Link0_addr>
	ether	<TnDef.Link0_addr>
NUT	global	3ffe:501:ffff:100::<NutDef.Link0_addr>
	link-local	fe80::<NutDef.Link0_addr>
	ether	<NutDef.Link0_addr>
H0	global	3ffe:501:ffff:101:200:ff:fe00:a0a0

SETUP

If the NUT is a router, configure a default route with TR1 as next hop.

TEST PROCEDURE

- Verify that NUT assumes the destination is off-link

    H0     TR1     NUT
    |       |       |
    |       | -->   | RA
    |       |       |
    |       *       | Wait (MAX_RTR_SOLICITATION_DELAY + RetransTimer * DupAddrDetectTransmits)
    |       |       |
    | ------------> | Echo Request
    |       |   <-- | NS (multicast) [Judgment #1]
    |       |   <-- | NS (multicast)
    |       |   <-- | NS (multicast)
    |       |       |
    V       V       V

    State: NONE (TN) (link-local)

1. Send RA

        IPv6 header
            hop limit          = 255
            source             = TN (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

    State: NONE (TN) (link-local)

3. Send Echo Request

        IPv6 header
            source      = H0  (global)
            destination = NUT (global)
        Echo Request

    State: INCOMPLETE (TN) (link-local)

4. Observe MAX_MULTICAST_SOLICIT NSs [Judgment #1]

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

        Node constants:
            MAX_MULTICAST_SOLICIT: 3 transmissions

    State: NONE (TN) (link-local)

JUDGEMENT

[Judgment #1] NUT must transmit 3 NSs to TN (solicited-node multicast address)

CLEANUP

- Remove global address
- Clear default router

    TN     NUT
    |       |
    | ----> | RA (rltime=0, vltime=0, pltime=0)
    |       |
    V       V

    State: NONE (TN) (link-local)

1. Send RA

        IPv6 header
            hop limit          = 255
            source             = TN (link-local)
            destination        = all-nodes multicast address
        RA
            cur hop limit      = 64
            M                  = 0
            O                  = 0
            router lifetime    = 0
            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::

    State: NONE (TN) (link-local)

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6