# NAME

            automatic_decapsulation_host.seq - Verify that node
            decapsulate IPv6 datagram in IPv4

# TARGET

            Host

# SYNOPSIS

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

# INITIALIZATION

    	Before this test starts, run initialize.seq.

# TEST PROCEDURE

            This test verifies that NUT decapsulates a IPv6 packet in
            automatic tunnel.

            TN                      NUT

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

            1.
             === IPv4 packet encapsulating IPv6 packet ===>
                    Outer Header (IPv4)
                            src address : Off-link IPv4 address
                            dst address : NUT's IPv4 address
                    Inner Header (IPv6)
                            src address : Off-link IPv4 compatible IPv6 address
                            dst address : NUT's IPv4 compatible IPv6 address
            2.
            In NUT, received IPv4 packet is decapsulated, and NUT creates the
            IPv6 Echo reply packet in response to encapsulated IPv6 Echo Reply.

            3.
            << JUDGMENT >>

             <=== IPv4 packet encapsulating IPv6 packet ===
                    Outer Header (IPv4)
                            src address : NUT's IPv4 address
                            dst address : Off-link IPv4 address
                    Inner Header (IPv6)
                            src address : NUT's IPv6 address
                            dst address : Offlink IPv6 global address

# JUDGMENT

            << PASS >>
                    NUT received IPv4 packet encapsulating IPv6 packet

            << FAIL >>
                    NUT did not receive IPv4 packet encapsulating IPv6 packet

# SEE ALSO

              perldoc V6evalTool