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<DIV><FONT face=Arial size=2>There used to be an old flag you could set on an
ICMP_ECHO request to record the path the echo reply takes back (ping -R or -r?),
but apparently its not used much anymore. Probably just as well.. it could only
hold ~8 hops..</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Andy</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=darrell@national-net.com
href="mailto:darrell@national-net.com">Darrell Carley</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=nanog@merit.edu
href="mailto:nanog@merit.edu">nanog@merit.edu</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, October 17, 2002 10:31
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> question concerning
traceroute?</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I am trying to troubleshoot a
latency issue for some of our networks, and was wondering about this�Knowing
that routing isn�t always symmetrical, is it possible for a traceroute to
traverse a different reverse path, than the path that it took to get
there?<SPAN style="mso-spacerun: yes"> </SPAN>�or will it provide a
trace of the path the packet took to reach the destination?<SPAN
style="mso-spacerun: yes"> </SPAN><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">According to definition, is should
take the same path, but are there any other cases that I should be aware
of?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-no-proof: yes">Darrell</SPAN></FONT><SPAN
style="mso-no-proof: yes"><o:p></o:p></SPAN></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; mso-no-proof: yes"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; mso-no-proof: yes"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; mso-no-proof: yes"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt; mso-no-proof: yes"> </SPAN><o:p></o:p></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>