<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hi Yusung,</div><div><br></div><div>No, ndnSIM (as of right now) does not have a concept of the implicit digest. Ideally, each individual piece of content should have a unique name. If you really want to distinguish between data produced by Producer1 and Producer2, why not explicitly name these two data pieces differently? Alternatively, you can explicitly add a digest component to the name.</div><div><br></div><div>---</div><div>Alex</div><br><div><div>On Mar 31, 2013, at 7:50 PM, Yusung Kim <<a href="mailto:yskim525@gmail.com">yskim525@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hi Alex and ndnSIM community.<div><br></div><div>When using ndnSIM, is there the same function of the implicit digest to get specific content ?</div><div>( the implicit digest is used in CCNx, right ? )</div><div><br></div>
<div>In the your example topology, </div><div>Does Consumer need to select one producer between Producer1 and Producer2 using the implicit digest ?</div><div><br></div><div>Thanks,</div><div><br></div><div>- Yusung Kim -</div>
<div><br></div><div><br><br><div class="gmail_quote">On Mon, Apr 1, 2013 at 4:11 AM, Alex Afanasyev <span dir="ltr"><<a href="mailto:alexander.afanasyev@ucla.edu" target="_blank">alexander.afanasyev@ucla.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div>Hi Amin,</div><div><br></div><div>Let me clarify a little bit with a small example:</div>
<div><br></div><div>Consumer --- Router ----- Producer1</div><div> |</div><div> +--------- Producer2</div><div><br></div><div>Assuming ns3::ndn::fw::Flooding strategy, Interests from the Consumer will reach both Producer1 and Producer2, and they both will send back a content object packet.</div>
<div><br></div><div>Router, receiving the first packet (depending on the topology, could be from Producer1 or Producer2) will forward it to the consumer and remove* the PIT entry. When the second content object arrives to the Router (not the consumer), it will be discarded by the router, as unsolicited. (I would not call this as a drop, since it is relatively high-level decision to not forward the specific packet.)</div>
<div><br></div><div>* PIT entry can be immediately removed (by default), or scheduled for removal within a short time interval (PitEntryPruningTimout). In either case, an extra content object will be discarded.</div><div>
<br></div><div>---</div><div>Alex</div><div><br></div><div><div>On Mar 31, 2013, at 12:02 PM, Amin Karami <<a href="mailto:amin@ac.upc.edu" target="_blank">amin@ac.upc.edu</a>> wrote:</div><br><blockquote type="cite">
<div text="#000000" bgcolor="#FFFFFF">
<div>In case of ns3::ndn::fw::Flooding, we
will have several drops. Because when a consumer receives desired
content from first sender/producer, consumer will drop other same
contents. Yes? because the desired Interest has been satisfied and
removed from PIT.<br>
<br>
<br>
/Amin<div><div class="h5"><br>
<br>
<br>
On 03/31/2013 08:42 ب.ظ, Alex Afanasyev wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite">
<div>Hi Amin,</div>
<div><br>
</div>
<div>I is possible, but it depends on the forwarding strategy to
deliver Interests to different producers. For example, if you
choose ns3::ndn::fw::BestRoute, then Interests will only be
delivered over the "shortest-metric" path and some of the
producers will never see the Interests. If you use
ns3::ndn::fw::Flooding, then all of the producers will receive
Interests and it would depend on network topology
(delays/losses) content object from which exactly producer will
reach the consumer.</div>
<div><br>
</div>
<div>In case if you have several consumers, depending on topology
and forwarding strategy, they may be getting content objects
from different producers.</div>
<div><br>
</div>
<div>If you want only some Interests be satisfied by one producers
and other by another, you may need to amend ndn::Producer
implementation (or better create a new custom Producer app) by
adding the appropriate logic.</div>
<div><br>
</div>
<div>---</div>
<div>Alex</div>
<br>
<div>
<div>On Mar 31, 2013, at 11:35 AM, Amin Karami <<a href="mailto:amin@ac.upc.edu" target="_blank">amin@ac.upc.edu</a>>
wrote:</div>
<br>
<blockquote type="cite">
<div text="#000000" bgcolor="#FFFFFF"> Hi friends,<br>
Is it possible to satisfy sent Interests from a consumer
with more than one producer?<br>
for example, does the following code work correctly to
satisfy Interests in /dst1 namespace with three producers?<br>
<pre style="overflow-x:auto;overflow-y:hidden;padding:5px;line-height:14px;border-top-width:1px;border-bottom-width:1px;border-style:solid none;border-top-color:rgb(170,204,153);border-bottom-color:rgb(170,204,153);font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;word-spacing:0px"><span style="background-color:rgb(255,255,136)"><span> ndnGlobalRoutingHelper</span><span>.</span><span>AddOrigins</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>,</span> <span>producer1</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>SetPrefix</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>Install</span> <span>(</span><span>producer1</span><span>);
</span> </span>
<span style="background-color:rgb(255,255,136)"><span> ndnGlobalRoutingHelper</span><span>.</span><span>AddOrigins</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>,</span> <span>producer2</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>SetPrefix</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>Install</span> <span>(</span><span>producer2</span><span>);</span></span>
<span style="background-color:rgb(255,255,136)"><span> ndnGlobalRoutingHelper</span><span>.</span><span>AddOrigins</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>,</span> <span>producer3</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>SetPrefix</span> <span>(</span><span style="color:rgb(64,112,160)">"/dst1"</span><span>);</span>
</span><span style="background-color:rgb(255,255,136)"> <span>producerHelper</span><span>.</span><span>Install</span> <span>(</span><span>producer3</span><span>);</span></span>
</pre>
<br>
Best Regards,<br>
/Amin<br>
<br>
</div>
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<br>
</blockquote>
<br>
<br>
</div></div><div>-- <br><p><font style="font-size:10pt" face="Verdana"><font color="#666666">
<br>
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<br>
=======================================================<br>
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(DAC) at<br>
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