NAME

  IP_FL_NonZeroEN - Flow Label Non-Zero (NUT receives Non-Zero Flow Label)

TARGET

  Host and Router

SYNOPSIS

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

INITIALIZATION

  None

TEST PROCEDURE

Verify that a node properly processes the Flow Label field of received packets and generates a valid value in transmitted packets.

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

  1. TN transmits an Send Echo Request with a Flow Label of 0x34567 to the NUT.
  2. Observe the packets transmitted by the NUT.

  Echo Request Data is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0x34567 (20 bit)
            PayloadLength      = 16
            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     = 0xffff
            SequenceNumber = 1
            PayloadData    = {1, 2, 3, 4, 5, 6, 7, 8}

JUDGEMENT

  The NUT must generate an Echo Reply.
  If the NUT supports use of the Flow Label field, 
  the Flow Label in the Echo Reply may be non-zero.
  Otherwise, the Flow Label field must be zero.
  
  PASS: Echo Reply Received

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = any (20 bit)
            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     = 0xffff (same as Echo Request)
            SequenceNumber = 1 (same as Echo Request)
            PayloadData    = {1, 2, 3, 4, 5, 6, 7, 8} (same as Echo Request)

or

  PASS: Echo Reply Received

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0 (Hosts or routers that do not support the Flow Label field)
            PayloadLength       = 16
            NextHeader          = 58 (ICMPv6)
            SourceAddress       = TN Link Local Address
            Destination Address = NUT Link Local Address

        ICMP Echo Reply
            Type           = 129 (Echo Reply)
            Code           = 0
            Checksum       = (auto)
            Identifier     = 0xffff (same as Echo Request)
            SequenceNumber = 1 (same as Echo Request)
            PayloadData    = {1, 2, 3, 4, 5, 6, 7, 8} (same as Echo Request)

CLEANUP

Common Test Cleanup

REFERENCE

RFC 2460 - IPv6 Specification