<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr">
<p style="margin-top:0;margin-bottom:0">Yes, according to NFD guide:</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0"></p>
<div>"Note that applying the suppression and retransmission mechanisms does not distinguish whether the Interest come from the same downstream or a different downstream. Although the former is typically a retransmission from the same consumer and the latter
is typically from a different consumer making use of NDN’s built-in Data multicast, there’s no prominent<br>
difference in terms of forwarding, so they are processed alike."</div>
<p></p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Ashlesh<br>
</p>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dehart, John <jdd@wustl.edu><br>
<b>Sent:</b> Wednesday, July 11, 2018 12:14:04 PM<br>
<b>To:</b> Ashlesh Gawande (agawande)<br>
<b>Cc:</b> <nfd-dev@lists.cs.ucla.edu><br>
<b>Subject:</b> Re: multicast strategy questions</font>
<div> </div>
</div>
<meta content="text/html; charset=utf-8">
<div class="" style="word-wrap:break-word"><br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Jul 11, 2018, at 10:46 AM, Ashlesh Gawande (agawande) <<a href="mailto:agawande@memphis.edu" class="">agawande@memphis.edu</a>> wrote:</div>
<br class="x_Apple-interchange-newline">
<div class="">
<div id="x_divtagdefaultwrapper" dir="ltr" class="" style="font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; font-size:12pt; font-family:Calibri,Helvetica,sans-serif">
<div class="" style="margin-top:0px; margin-bottom:0px">I think for ad-hoc faces you have to turn then on in the nfd.conf file.</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Since the second interest came after 10 ms it is considered a re-transmission and will be forwarded.</div>
</div>
</div>
</blockquote>
<div><br class="">
</div>
So, it is considered a retransmission even if it arrived on a different face?</div>
<div><br class="">
<blockquote type="cite" class="">
<div class="">
<div id="x_divtagdefaultwrapper" dir="ltr" class="" style="font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; font-size:12pt; font-family:Calibri,Helvetica,sans-serif">
<div class="" style="margin-top:0px; margin-bottom:0px">More info under 5.2.1 "<span class="">Retransmission suppression interval</span>" in the nfd devguide:</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><a href="http://named-data.gitlab.io/TR-NDN-0021-NFD-dev-guide/ndn-0021-nfd-guide.pdf" class="x_OWAAutoLink" id="LPlnk231271">http://named-data.gitlab.io/TR-NDN-0021-NFD-dev-guide/ndn-0021-nfd-guide.pdf</a><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Also see 5.2.2 for Multicast Strategy interest forwarding.<br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Strategy parameters feature is available but strategies have not been modified yet to configure them.</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><a href="https://redmine.named-data.net/issues/3868" class="x_OWAAutoLink" id="LPlnk637210">https://redmine.named-data.net/issues/3868</a><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Ashlesh<br class="">
</div>
</div>
<hr tabindex="-1" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; display:inline-block; width:572.3125px">
<span class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important"></span>
<div id="x_divRplyFwdMsg" dir="ltr" class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="x_Apple-converted-space"> </span>Nfd-dev <<a href="mailto:nfd-dev-bounces@lists.cs.ucla.edu" class="">nfd-dev-bounces@lists.cs.ucla.edu</a>> on behalf of Dehart,
John <<a href="mailto:jdd@wustl.edu" class="">jdd@wustl.edu</a>><br class="">
<b class="">Sent:</b><span class="x_Apple-converted-space"> </span>Monday, July 9, 2018 3:50:03 PM<br class="">
<b class="">To:</b><span class="x_Apple-converted-space"> </span><<a href="mailto:nfd-dev@lists.cs.ucla.edu" class="">nfd-dev@lists.cs.ucla.edu</a>><br class="">
<b class="">Subject:</b><span class="x_Apple-converted-space"> </span>[Nfd-dev] multicast strategy questions</font>
<div class=""> </div>
</div>
<div class="" style="font-family:Helvetica; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; word-wrap:break-word">
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">All:</div>
<div class=""><br class="">
</div>
<div class="">I have the following snippet of a packet trace that I am trying to understand. All of the packets are for the same name.</div>
<div class=""><br class="">
</div>
<div class="">The topology for this is that there are three endpoints: 192.168.1.2, 192.168.2.2 and 192.168.3.2 that are all only connected to a node: 192.168.21.2.</div>
<div class="">Node 192.168.21.2 is also connected to the rest of the network only through the node 192.168.25.1. The rest of the network contains other endpoints.</div>
<div class=""><br class="">
</div>
<div class="">There is also an app running on 192.168.21.2 that is looking for this same piece of data. So the Second Nonce= 582128689 is </div>
<div class="">probably because of this app.</div>
<div class=""><br class="">
</div>
<div class="">My question is why does 192.168.21.2 send a second Interest to 192.168.1.2 12 ms after the first one it sent?</div>
<div class="">Shouldn’t there be a PIT entry for that data name active at that point?</div>
<div class=""><br class="">
</div>
<div class="">Similarly, why does 192.168.21.2 send an Interest back to 192.168.25.1?</div>
<div class=""><br class="">
</div>
<div class="">I am using the multicast strategy. I know that there are some differences in how it works for ad-hoc faces.</div>
<div class="">How do I tell if my face is for some reason ad-hoc?</div>
<div class=""><br class="">
</div>
<div class="">Thanks,</div>
<div class="">John</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">
<div class="">1531097314.703293 From: 192.168.25.1, To: 192.168.21.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class=""><b class="">1531097314.703522 From: 192.168.21.2, To: 192.168.1.2, Tunnel Type: UDP, INTEREST:</b> /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class="">1531097314.703612 From: 192.168.21.2, To: 192.168.2.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class="">1531097314.703694 From: 192.168.21.2, To: 192.168.3.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class="">1531097314.714403 From: 192.168.2.2, To: 192.168.21.2, Tunnel Type: UDP, NACK: NoRoute, /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class="">1531097314.714538 From: 192.168.3.2, To: 192.168.21.2, Tunnel Type: UDP, NACK: NoRoute, /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=3488903727</div>
<div class=""><br class="">
</div>
<div class="">1531097314.715668 From: 192.168.21.2, To: 192.168.25.1, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=582128689</div>
<div class=""><b class="">1531097314.715753 From: 192.168.21.2, To: 192.168.1.2, Tunnel Type: UDP, INTEREST</b>: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=582128689</div>
<div class="">1531097314.715845 From: 192.168.21.2, To: 192.168.2.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=582128689</div>
<div class="">1531097314.715926 From: 192.168.21.2, To: 192.168.3.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=582128689</div>
<div class="">1531097314.725586 From: 192.168.1.2, To: 192.168.21.2, Tunnel Type: UDP, DATA: /ndn/broadcast/jdd/name2/name3/name4/name5/701</div>
<div class="">1531097314.725598 From: 192.168.2.2, To: 192.168.21.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=1523237434</div>
<div class="">1531097314.725879 From: 192.168.21.2, To: 192.168.25.1, Tunnel Type: UDP, DATA: /ndn/broadcast/jdd/name2/name3/name4/name5/701</div>
<div class="">1531097314.726178 From: 192.168.21.2, To: 192.168.2.2, Tunnel Type: UDP, DATA: /ndn/broadcast/jdd/name2/name3/name4/name5/701</div>
<div class="">1531097314.726817 From: 192.168.1.2, To: 192.168.21.2, Tunnel Type: UDP, DATA: /ndn/broadcast/jdd/name2/name3/name4/name5/701</div>
<div class="">1531097314.727217 From: 192.168.3.2, To: 192.168.21.2, Tunnel Type: UDP, INTEREST: /ndn/broadcast/jdd/name2/name3/name4/name5/701?ndn.InterestLifetime=1500&ndn.Nonce=2774503116</div>
<div class="">1531097314.727683 From: 192.168.21.2, To: 192.168.3.2, Tunnel Type: UDP, DATA: /ndn/broadcast/jdd/name2/name3/name4/name5/701</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br class="">
</div>
</body>
</html>