# NAME

LLA_DAD_NAPostDAD_DiffTgt - check the process when NUT receives DAD NA with different Target address after sending DAD NS.

# TARGET

All Node

# SYNOPSIS

LLA_DAD_NAPostDAD_DiffTgt.seq [-tooloption ...] -pkt <packetdef> [addrconf=<addrconfname>]

      -tooloption   : v6eval tool option
      <packetdef>   : packet definition file (v6eval tool option)
      <addrconfname>: how to configure address on NUT; boot/reboot

     detail of v6eval tool option: see perldoc V6evalTool.pm, perldoc V6evalRemote.pm

# INITIALIZATION

     Reboot NUT or Initialize interface of NUT or Initialize IPv6 stack of NUT.

# TEST PROCEDURE

Test for Unicast address configuration

  The following tests are prepared in this test package. See INDEX file.

  Test for all node

         NUT assignes autoconfigured address, even though NUT receives DAD NA for
         other target address from other node, while DAD process (after transmitting DAD NS).

  Test sequence

        TN                            NUT
        ---------------------------------
        Initialize NUT

        Configure address of NUT (reboot or interface initialization etc...)

        TN wait the DAD NS sent from NUT
        <=== Judgement #1: DAD NS =======
              name: DADNS_from_NUT

        ==== Action #1: DAD NA =========>
              name: DADNA_from_TN_DiffTgt

        Wait for DupAddrDetectTransmits*RetransTimer

        Check if NUT's address is configured
        ==== Action #2: SOL NS =========>
              name: SOLNS_from_TN_SameTgt

        <=== Judgement #2: DAD NA =======
              name: NA_from_NUT, NA_from_NUT_woTLL

# JUDGEMENT

Test for Link-local Unicast address autoconfiguration

  Test for all NODE

  NUT performs Stateless Address Autoconfiguration(Link-local) on its interface

         Judgement #1. NUT MUST transmit DAD NS for its autoconfigured Link-local address.
              name: DADNS_from_NUT
              src: ::0
              dst: solnode[NUT's tentative Link-local]
              TargetAddress: NUT's tentative Link-local

         Action #1. TN transmits DAD NA which contains different target Address
              name: DADNA_from_TN_DiffTgt
              src: TN's Link-local
              dst: allnode
              TargetAddress: TN's Link-local
              RFlag: 0
              SFlag: 0
              OFlag: 1
              OLLOPT: TN's MAC address

         Action #2. TN transmits SOL NS to check if NUT's address is configured
              name: SOLNS_from_TN_SameTgt
              src: TN's Link-local
              dst: solnode[NUT's Link-local]
              TargetAddress: NUT's Link-local

         Judgement #2. NUT MUST transmit SOL NA for its autoconfigured  Link-local address.
              name: NA_from_NUT, NA_from_NUT_woTLL
              src: NUT's Link-local
              dst: TN's Link-local
              TargetAddress: NUT's Link-local
              RFlag: 0 ( if NUT is a Router then 1)
              SFlag: 1
              OFlag: 1
              TLLOPT: NUT's MAC address

# REFERENCE

    RFC2462

    5.4.  Duplicate Address Detection

       (omit)
       An address on which the duplicate Address Detection Procedure is
       applied is said to be tentative until the procedure has completed
       successfully.  A tentative address is not considered "assigned to an
       interface" in the traditional sense. That is, the interface must
       accept Neighbor Solicitation and Advertisement messages containing
       the tentative address in the Target Address field, but processes such
       packets differently from those whose Target Address matches an
       address assigned to the interface. Other packets addressed to the
       tentative address should be silently discarded.
       (omit)

# SEE ALSO

     detail of v6eval tool option: see perldoc V6evalTool.pm, perldoc V6evalRemote.pm