NAME

        Dst_Unreach_3_Global.seq - check ICMPv6 Destination 
        Unreachable code 3

TARGET

        Router

SYNOPSIS

        Dst_Unreach_3_Global.seq [-tooloption ...] -p 
        Dst_Unreach_3_Global.def

NETWORK CONFIGURATION

        This test is OFF-LINK Network Configuration test.
        
        Physical Network configuration
        
        ---------------------------------------
                |               |
                NUT             TN

        Logical Network Configuration

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

INITIALIZATION

        When test stars, configure a default route with TN as the next hop.
        And states of Neighbor Cache Entry for TN's addresses are reachable.

TEST PROCEDURE

        This test verifies that NUT sends valid ICMPv6 Destination 
        Unreachable (code 3) in response to a packet which can not 
        be delivered to destination address (e.g. Address Resolution 
        in ND).

        TN                      NUT

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

        1.
         === Echo Request packet  ===>
                src address : TN global address
                dst address : on-link unreachable address
        2.
        << JUDGEMENT >>

         <=== ICMPv6 Destination Unreachable ===
                Code is 3

JUDGEMENT

        << PASS >>
                NUT send ICMPv6 Destination Unreachable.

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

REFERENCE

RFC 2463 - ICMPv6 (ICMP for IPv6)