NAME

  IP_TC_NonZeroIN - Traffic Class Non-Zero - Intermediate Node (Router Only)

TARGET

  Router

SYNOPSIS

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

INITIALIZATION

  None

TEST PROCEDURE

Verify that a router properly processes the Traffic Class field of received packets and generates a valid value in transmitted packets.

    TN1                        RUT                         TN2
              (Link0)                     (Link1)
    |                           |                           |
    |-------------------------->|                           |
    |   Echo Request            |                           |
    |                           |                           |
    |                           |                           |
    |                           |                           | 
    |                           |-------------------------->|
    |                           |   Echo Request            |
    |                           |                           |
    |                           |                           |
    v                           v                           v

  1. TN1 transmits an Echo Request to TN2's Global Address with a first hop through the RUT,
     an Echo Request with a Traffic Class field of 32, which is non-zero.
  2. Observe the packets transmitted by the RUT.

  Echo Request Data is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0x20 (8 bit)
            FlowLabel          = 0
            PayloadLength      = 16
            NextHeader         = 58 (ICMPv6)
            SourceAddress      = TN1 Global Address (Link0)
            DestinationAddress = TN2 Global Address (Link1)

        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

  PASS: The RUT must forward the Echo Request.

        IPv6 Header
            Version             = 6
            Traffic Class       = 0
            FlowLabel           = 0
            PayloadLength       = 16
            NextHeader          = 58 (ICMPv6)
            SourceAddress       = TN1 Global Address (Link0)
            DestinationAddress  = TN2 Global Address (Link1)

        ICMP Echo Request
            Type           = 128 (Echo Request)
            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 8200 - IPv6 Specification