NAME

  F_TX_intime - Reassembly Time Exceeded (Time Elapsed Between Fragments less than Sixty Seconds)

TARGET

  Host and Router

SYNOPSIS

INITIALIZATION

  Common Test Setup 1.1

TEST PROCEDURE

Verify that a node takes the proper actions when th reassembly time has been exceeded for a packet.

   TN                          NUT
    |                           |
    |-------------------------->|
    |   Echo Request (1st)      |
    |                           |
    |                           |
    |   wait for 55 sec.        |
    |                           |
    |                           |
    |-------------------------->|
    |   Echo Request (2nd)      |
    |                           |
    |-------------------------->|
    |   Echo Request (3rd)      |
    |                           |
    |<--------------------------|
    |   Echo Reply              |
    |                           |
    |                           |
    v                           v

  1. TN transmits 1st, 2nd and 3rd Fragments in order.
     There is a 55-second delay between the transmission of 1st Fragment and 2nd, 3rd Fragments.
  2. Observe the packets transmitted by the NUT.

  Echo Request Data (original) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 88
            NextHeader         = 58 (ICMPv6)
            SourceAddress      = TN Global Address
            DestinationAddress = NUT Global Address

        ICMP Echo Request
            Type           = 128 (Echo Request)
            Code           = 0
            Checksum       = (auto)
            Identifier     = (auto)
            SequenceNumber = 0
            PayloadData    = data repeat{0x1, 40}
                             data repeat{0x2, 40}

  Echo Request Data (1st fragment) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 40
            NextHeader         = 44 (Fragment Header)
            SourceAddress      = TN Global Address
            DestinationAddress = NUT Global Address

        Fragment Header
            NextHeader         = 58 (ICMPv6)
            FragmentOffset     = 0
            MFlag              = 1
            Identification     = 32bit (Automatic generation)

        Payload
            data               = 32 octets from the head of ICMP Echo request

  Echo Request Data (2nd fragment) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 40
            NextHeader         = 44 (Fragment Header)
            SourceAddress      = TN Global Address
            DestinationAddress = NUT Global Address

        Fragment Header
            NextHeader         = 58 (ICMPv6)
            FragmentOffset     = 4
            MFlag              = 1
            Identification     = 32bit (Automatic generation)

        Payload
            data               = 32 octets from the back of ICMP Echo request

  Echo Request Data (3rd fragment) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 32
            NextHeader         = 44 (Fragment Header)
            SourceAddress      = TN Global Address
            DestinationAddress = NUT Global Address

        Fragment Header
            NextHeader         = 58 (ICMPv6)
            FragmentOffset     = 8
            MFlag              = 0
            Identification     = 32bit (Automatic generation)

        Payload
            data               = 24 octets from the back of ICMP Echo request

JUDGEMENT

  PASS: 2nd and 3rd Fragments arrive just before the NUT's reassembly timer expires for 1st Fragment.
        The NUT must transmit an Echo Reply to TN in response to the reassembled Echo Request.

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0
            PayloadLength       = 88
            NextHeader          = 58 (ICMPv6)
            SourceAddress       = NUT Global Address
            Destination Address = TN Global Address

        ICMP Echo Reply
            Type           = 129 (Echo Reply)
            Code           = 0
            Checksum       = (auto)
            Identifier     = (same as Echo Request)
            SequenceNumber = (same as Echo Request)
            PayloadData    = (same as Echo Request)

CLEANUP

Common Test Cleanup

REFERENCE

SEE ALSO

  perldoc V6evalTool