NAME

        Err_Condition_Too_Big - Echo Request Too Big (Router Only)

TARGET

        Router

SYNOPSIS

        Err_Condition_Too_Big.seq [-tooloption ...] -p Err_Condition_Too_Big_*.def

NETWORK CONFIGURATION

        This test is OFFLINK Network Configuration test.
        In this test, TN play a Roll of the Router.
        
        Physical Network configuration
        
        Link0   
        --------+---------------+--------------
                |               |
                RUT             TN
                |               |
        --------+---------------+--------------
        Link1

        Logical Network Configuration

                        Host A (TN-Link0)
                        |                                       Link0
        --------+-------+-----------------
                | 
                RUT (globaladdress:B)
                |
        --------+-------+-----------------
                        |                                       Link1
                        Router(TN-Link1)
                        |
        ----------------+-------+---------
                                |
                                HOST B (OFFLINK_LINK1_GLOBAL_ADDRESS)

        In this configuration, Packets are send and received.

        for example,
                In Logical
                        HOST B           -- Echo Reply --> RUT
                Actually, in physical
                        TN (as Router)   -- Echo Reply --> RUT

INITIALIZATION

        Common Test Setup 1.1

TEST PROCEDURE

Verify that a node properly handles the reception of an error condition caused by a packet with a source address that does not uniquely identify a single node.

        This test verifies that the node sends a Packet Too Big Message 
        in response to a packet that it can not forward because the packet 
        is larger than the MTU of the outgoing link.

        TN                      RUT

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

        1.
        After RUT is initialized (set static route) , RUT sets 
        the Link MTU of LINK1 Interface to 1280 .

        2.
        TN send Echo Request to Host B.

         === echo request  ===>
                src address : does not identify a single node uniquely
                dst address : off link global address
                PayloadLength : 1460

        3.
        << JUDGEMENT >>

         <=== No pakcet ===

JUDGEMENT

    << PASS >>
    The RUT must not send a Packet Too Big Error Message to TN
    when it receives an ICMPv6 Echo Request that is 
    too large for it to send on its outgoing interface.

CLEANUP

Common Test Cleanup

REFERENCE

RFC 4443 - ICMPv6 (ICMP for IPv6)