NAME

  HHO_MSB11mc_EN - Options Processing, Hop-by-Hop Options Header - End Node (Most Significant Bits 11, multicast destination)

TARGET

  Host and Router

SYNOPSIS

  HHO_MSB11mc_EN.seq [-tooloption ...] -pkt HHO_MSB11mc_EN.def
    -tooloption : v6eval tool option

INITIALIZATION

  None

TEST PROCEDURE

Verify that a node properly processes both known and unknown options, and acts in accordance with highest order two bits of the option.

   TN                          NUT
    |                           |
    |-------------------------->|
    |   Echo Request            |
    |                           |
    |                           |
    | (<----------------------) |
    |     No Packet             |
    |                           |
    |                           |
    v                           v

  1. TN transmits an Echo Request sent to a local multicast address 
     that has a Hop-by-Hop Options header with an unknown Option Type of 199.
  2. Observe the packets transmitted by the NUT.

  Echo Request Data is:

        IPv6 Header
            Version            = 6
            Traffic Class      = 0
            FlowLabel          = 0
            PayloadLength      = 16
            NextHeader         = 0 (Hop-by-Hop Options Header)
            SourceAddress      = TN Link Local Address
            DestinationAddress = Link-local Multicast Address

        Hop-by-Hop Options Header
            NextHeader         = 58 (ICMPv6)
            HeaderExtLength    = 0
            OptionType         = 0xc7 (unknown, msb: 11)
            OptDataLength      = 4
            data               = {0, 0, 0, 0}

        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 NUT must not generate any packets sent to TN. 
        The Echo Request is discarded, as the destination address is multicast.
        The NUT must not send an ICMPv6 Parameter Problem message.

CLEANUP

Common Test Cleanup

REFERENCE

RFC 8200 - IPv6 Specification