# NAME

            To_ICMPErr_Dst_Unreach_4.seq - check Message Processing Rules (ICMPv6
            Destination Unreachable)

# TARGET

            Router

# SYNOPSIS

            To_ICMPErr_Dst_Unreach_4.seq [-tooloption ...] -p To_ICMPErr_Dst_Unreach_4.def

# NETWORK CONFIGURATION

            This test is OFF-LINK Network Configuration test.

            Physical Network configuration

            ---------------------------------------
                    |               |
                    NUT             TN

            Logical Network Configuration

                                    TN
                                    |
            ----------------------------------
                            |
                            NUT
                            |
            ----------------------------------
                    |
                    OFFLINKA Host

# INITIALIZATION

            Make a Neighbor Cache Entry for TN's in NUT.

# TEST PROCEDURE

            This test verifies that the message processing rule ,

            (e) An ICMPv6 error message MUST NOT be sent as a result of
            receiving:

             (e.1) an ICMPv6 error message, or

            TN                      NUT

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

            1.
             === ICMPv6 Destination Unreachable  ===>
                    src address : TN global address
                    dst address : OFFLINK address
                    code        : port unreachable
            2.
                    NUT can't deliver to destination address.
                    (NUT have not route for the dst address.)
            3.
            << JUDGMENT >>

             <=== No packets ===
                            or
             <=== ICMPv6 Destination Unreachable ===
                 Code is 4

# JUDGMENT

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

            << FAIL >>
                    NUT send ICMPv6 Destination Unreachable.

# SEE ALSO

              perldoc V6evalTool