NAME

        Dst_Unreach_4_Global.seq -  Port Unreachable - Global Address

TARGET

        Host/Router

SYNOPSIS

        Dst_Unreach_4_Global.seq [-tooloption ...] -p 
        Dst_Unreach_4_Global.def

INITIALIZATION

        Common Test Setup 1.1

TEST PROCEDURE

        Verify that a node properly generates Destination Unreachable Messages.

        This test verifies that NUT sends valid ICMPv6 Destination 
        Unreachable (code 4) in response to a packet which can not 
        be delivered to destination port.
        And this test verifies that the message processing rule ,

        If the message is a response to a message sent to one of the
        node's unicast addresses, the Source Address of the reply must
        be that same address.

        TN                      NUT

        ---------------------------

        1.
         === UDP packet  ===>
                src address : TN global address
                dst address : NUT global address        
                    port    : not used in NUT (9000)
        2.
        << JUDGEMENT >>

         <=== ICMPv6 Destination Unreachable ===
                Code is 4

JUDGEMENT

    << PASS >>
    The NUT should send a Destination Unreachable Message to TN.
    The Source Address of the Packet should be one of the NUT's unicast addresses,
    while the Destination Address should be the same as the Global Source Address in TN's packet.
    The Code field should be set to "4".
    The invoking Echo Request packet included in the Error Message must not exceed minimum IPv6 MTU.

CLEANUP

Common Test Cleanup

REFERENCE

RFC 4443 - ICMPv6 (ICMP for IPv6)