# NAME

            Dst_Unreach_4_Link-Local.seq - check ICMPv6 Destination
            Unreachable code 4

# TARGET

            Host/Router

# SYNOPSIS

            Dst_Unreach_4_Link-Local.seq [-tooloption ...] -p
            Dst_Unreach_4_Link-Local.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