#!/usr/bin/perl
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# $TAHI: ct/nd.p2/v6LC_2_2_17_C.seq,v 1.4 2009/01/05 06:39:39 akisada Exp $
#
########################################################################

use rdisc;

BEGIN {}
END   {}

if($V6evalTool::NutDef{'Type'} ne 'host') {
	exitHostOnly($Link0);
	#NOTREACHED
}

vCapture($Link0);

$pktdesc{'local_ra'} =
	'    Send RA w/ SLL (diff): '.
	'TR1 (link-local) -> all-nodes multicast address';

unless(v6LC_2_2_17_C($Link0)) {
	exitFail($Link0);
	#NOTREACHED
}

exitPass($Link0);
#NOTREACHED



#
# perldoc
#
########################################################################
__END__

=head1 Title

  Test v6LC.2.2.17: Router Advertisement Processing, IsRouter flag (Hosts Only)
  Part C: RA with different Source Link-layer option as cached

=head1 Purpose

  Verify that a host properly updates the IsRouter flag in its Neighbor Cache upon receipt of a
  Router Advertisement.

=head1 References

  * [ND]  Sections 6.3.4

=head1 Resource Requirements

  * Packet generator
  * Monitor to capture packets

=head1 Test Setup

  No Common Test Setup is performed. Wait at least 3 seconds
  (MAX_MULTICAST_SOLICIT * RETRANS_TIMER) after any previous cleanup to make sure all
  previous NCE's are in state No NCE. The Common Test Cleanup procedure is performed after each
  part.

=begin html

<BLOCKQUOTE>

<TABLE BORDER>
<Caption>Router Advertisement A</Caption>
<TR>
<TD>
	IPv6 Header<br>
	Next Header: 58<br>
	Source Address: TR1's Link-local Address<br>
</TD>
</TR>
<TR>
<TD>
	Router Advertisement<br>
	Router Lifetime: 600 seconds<br>
	Reachable Time: 0 seconds<br>
	Retransmit Interval: 1 second<br>
	Source Link-layer Option

</TD>
</TR>
</TABLE>

<br>

<TABLE BORDER>
<Caption>Echo Request A</Caption>
<TR>
<TD>
        IPv6 Header<br>
        Next Header: 58<br>
        Source Address: TN2's off-link Global Address<br>
        Destination Address: HUT's Global Address
</TD>
</TR>
<TR>
<TD>
	ICMPv6 Echo Request
</TD>
</TR>
</TABLE>

</BLOCKQUOTE>

=end html


=head1 Procedure

  Part C: RA with different Source Link-layer option as cached
   15. TR1 transmits a Link-local Echo Request to the HUT.
   16. TR1 answers any Neighbor Solicitations with a Neighbor Advertisement (R=0, S=1, O=1) to the
       HUT.
   17. Observe the packets transmitted by the HUT.
   18. TR1 transmits Router Advertisement A with different Source Link-layer option to the HUT.
   19. Wait for the HUT to perform Duplicate Address Detection on its global address.
   20. TN2 transmits Echo Request A to the HUT with a nexthop of TR1.
   21. Observe the packets transmitted by the HUT.

=head1 Observable Results

  Part C
   Step 17:
   The HUT should transmit an Echo Reply to TR1's link local address and update it's
   NCE to state REACHABLE. The HUT sets the isRouter flag to false.

   Step 21:
   The HUT sets the isRouter flag to true and transmits an Echo Reply to TN2's off-
   link address with a next hop of TR1.
=head1 Possible Problems

  * None. 

=cut