NAME

  F_Stub - Atomic Fragment (Link-Local)

TARGET

  Host and Router

SYNOPSIS

  F_Stub.seq [-tooloption ...] -pkt F_Stub.def
    -tooloption : v6eval tool option

INITIALIZATION

  None

TEST PROCEDURE

Verify that a node accepts the offset zero fragment with the More Fragments flag clear.

   TN                          NUT
    |                           |
    |-------------------------->|
    |   Echo Request            |
    |                           |
    |                           |
    |<--------------------------|
    |   Echo Reply              |
    |                           |
    |                           |
    v                           v

  1. TN transmits an Echo Request that has a Fragment header with a Fragment Offset of 0 and the More Fragments flag clear.
  2. Observe the packets transmitted by the NUT.

  Echo Request Data (original) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 15
            NextHeader         = 58 (ICMPv6)
            SourceAddress      = TN Link Local Address
            DestinationAddress = NUT Link Local Address

        ICMP Echo Request
            Type           = 128 (Echo Request)
            Code           = 0
            Checksum       = (auto)
            Identifier     = (auto)
            SequenceNumber = 0
            PayloadData    = {0, 1, 2, 3, 4, 5, 6, 7}

  Echo Request Data (Offset 0, MFlag 0) is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 24
            NextHeader         = 44 (Fragment Header)
            SourceAddress      = TN Link Local Address
            DestinationAddress = NUT Link Local Address

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

        Payload
            data               = 16 octets from the head of ICMP Echo request

JUDGEMENT

  PASS: The NUT must transmit an Echo Reply to TN1. The Echo Reply must not include a Fragment header.

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0
            PayloadLength       = 16
            NextHeader          = 58 (ICMPv6)
            SourceAddress       = NUT Link Local Address
            Destination Address = TN Link Local 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

RFC 8200 - IPv6 Specification