# NAME

            pmtuStore - Verify if NUT can store PMTU for multiple Destinations.

# TARGET

            Host

# SYNOPSIS

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

# NETWORK CONFIGURATION

            This test evaluate the behavior of NUT when it receive the ICMP
            Packet Too Big Message for multiple destinations.
            In this test, NUT is a host and TN plays a Roll of Routers and
            other hosts.

            Phisical Network configuration

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

            Logical Network Configuration

                                    NUT
                                    |
            ----------------+-------+--------
                            |
                            Router-1
                            |
            --------+-------+-------+--------
                    |               |
                 Router-2         HOST-1
                    |
            --------+-------+-------+--------
                            |       |
                         Router-n  HOST-2
                            |
            ----------------+-------+--------
                                    |
                                  HOST-n
                                    :
                                    :

            In this test, NUT receives Packet Too Big Messages for multiple
            destinations.
            - Register PMTU for multiple HOST
            - Verify PMTU for multiple HOST

# INITIALIZATION

            The TN send a RA to assign global address prefix.

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

            ===multicast RA===>
            src=TN's link-local
            dst=LinkLocal-all-node
            M=0, O=0,
            Lifetime=3600, ReachableTime=60000, RetransTimer=1005
            Prefix:
               L=1, A=1,
               ValidLifetime=3600005, PreferredLifetime=3600005
               Prefix=3ffe:501:ffff:100::, PrefixLength=64

              Wait (5 sec.)
                     Ignoring DAD packets for global address.

# TEST PROCEDURE

            "pmtuStore" verify NUT's behavior when it receives
             ICMP Packet Too Big Mesg for multiple destinations.

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

            1. Register PMTU for multiple destinations
            1.1
            TN send Echo Request.
            TN(n) === echo request(1500) ===> NUT

            1.2
            NUT send Echo Reply.

            TN(n) <=== echo reply(1500) === NUT

            1.3
            TN send ICMPv6 Too Big Mesg with MTU (1280+n*8).

            TN(n) === ICMPv6 Too Big Mesg(MTU=1280+n*8) ===> NUT

            2. Confirm PMTU for multiple destinations
            2.1
            TN send Echo Request.
            TN(n) === echo request(1500) ===> NUT

            2.2
            NUT send Echo Reply
            << JUDGMENT 1 >>
            TN(n) <=== echo reply(1280+n*8 1/2) === NUT
            TN(n) <=== echo reply( 276-n*8 2/2) === NUT

# JUDGMENT

            << JUDGMENT 1 -PASS- >>
                    NUT send Echo Reply

                    "PASS" means that NUT set valid MTU in received Packet Too Big message for multiple destinations.
                    And fragmented packets are correct.

# SEE ALSO

            perldoc V6evalTool
            perldoc V6evalRemote