NAME

        Dst_Unreach_4_Global.seq - check ICMPv6 Destination 
        Unreachable code 4 

TARGET

        Host/Router

SYNOPSIS

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

INITIALIZATION

        When test starts, states of Neighbor Cache Entry for TN's 
        addresses are reachable.

TEST PROCEDURE

        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 link local address
                dst address : NUT link local address    
                    port    : not used in NUT
        2.
        << JUDGMENT >>

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

JUDGMENT

        << PASS >>
                NUT send ICMPv6 Destination Unreachable.
                

        << FAIL >>      
                NUT do not send ICMPv6 Destination Unreachable.

SEE ALSO

          perldoc V6evalTool