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<TITLE>DHCPv6 self-test RAND of .1 fails</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hello All,</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Whenever my node generates a RAND value =
of .1, the TAHI test suite fails for all max retransmission time =
tests. It seems the TAHI test suite is interpretting the =
definition of RAND in RFC 3315 as -.1 to .1 non-inclusive.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Here is the situation for RFC 3315 test =
#37 when RAND is chosen as .1 in retransmissions:</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">First retransmission</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = IRT + (RAND * =
IRT)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = 1 + (.1 * =
1)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = 1.1</FONT>
</P>
<P><FONT COLOR="#000000" SIZE=2 FACE="Arial">Second =
retransmission</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = (2 * RTprev) =
+ (RAND * RTprev)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = (2 * 1.1) + =
(.1 * 1.1)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = 2.31</FONT>
</P>
<P><FONT COLOR="#000000" SIZE=2 FACE="Arial">Third =
retransmission</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = (2 * RTprev) =
+ (RAND * RTprev)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = (2 * 2.31) + =
(.1 * 2.31)</FONT>
<BR><FONT COLOR="#000000" SIZE=2 FACE="Arial">RT = 4.851</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">The test fails here due to "Actual =
RT is bigger than the expected maximum value". I am not sure =
what the expected maximum value is.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">First, can someone comment on whether =
the TAHI test suite interprets the RAND values defined in RFC 3315 as =
inclusive or non-inclusive?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Second, if the values are supposed to =
be inclusive, can someone verify that this is a problem with the TAHI =
test suite?</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Best Regards,</FONT>
<BR><FONT SIZE=2 FACE="Arial">Tammy Leino</FONT>
</P>
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