NAME

        Dst_Unreach_0_Global.seq - check ICMPv6 Destination 
        Unreachable code 0

TARGET

        Router

SYNOPSIS

        Dst_Unreach_0_Global.seq [-tooloption ...] -p 
        Dst_Unreach_0_Global.def

INITIALIZATION

        When test starts, 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 0) in response to a packet which can not 
        be delivered to destination address because NUT have no route.
        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.
         === Echo Request  ===>
                src address : TN global address
                dst address : offlink address
        2.
        << JUDGEMENT >>

         <=== ICMPv6 Destination Unreachable ===
                Code is 0

JUDGEMENT

        << PASS >>
                NUT send ICMPv6 Destination Unreachable.

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

REFERENCE

RFC 2463 - ICMPv6 (ICMP for IPv6)