[ndnSIM] stop producer from forwarding interests
Muhammad Hosain Abdollahi Sabet
M.AbdollahiSabet at mail.sbu.ac.ir
Mon Apr 4 12:55:41 PDT 2016
Dear Asif,
I see. The station you have, is because of forwarding strategy in surrounding nodes, which I guess is set to "multicast" for all of them. Actually your producers are not the ones which are forwarding interest for the very prefix they are responsible for themselves. Surrounding nodes are the ones which are forwarding interests. If you put your producers in one line you will see. If you try with a 7*1 grid in which :
Ptr<Node> producerA = grid.GetNode(3,0);
Ptr<Node> producerB = grid.GetNode(4,0);
Ptr<Node> producerC = grid.GetNode(5,0);
Ptr<Node> producerD = grid.GetNode(6,0);
and try only one consumer with interest for prefix of produceA, you will see that produceB,C&D will receive no interests.
Thanks,
Sabet
-----Original Message-----
From: Shahid Md. Asif Iqbal [mailto:asifcsep at gmail.com]
Sent: Mon 4/4/2016 2:17 PM
To: Muhammad Hosain Abdollahi Sabet
Cc: Junxiao Shi; ndnsim
Subject: Re: [ndnSIM] stop producer from forwarding interests
Dear Sabet,
Can you please draw the scenario here you tried with? And, can you please
try this scenario with only one prefix name "/prefix" for all producers and
the consumer requesting for the only prefix.
* ( ) ----- ( ) ----- ( ) ----- (c) ------ ( ) ----- ( ) ----- ( )
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- ( ) ------ ( ) ----- ( ) ----- ( )
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- ( ) ------ ( ) ----- ( ) ----- ( )
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- (p) ------ ( ) ----- ( ) ----- (p)
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- ( ) ------ ( ) ----- ( ) ----- ( )
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- ( ) ------ ( ) ----- ( ) ----- ( )
* | | | | | | |
* | | | | | | |
* ( ) ----- ( ) ----- ( ) ----- (p) ------ ( ) ----- ( ) ----- (p)
Thanks
Asif
On Mon, Apr 4, 2016 at 1:10 PM, Muhammad Hosain Abdollahi Sabet <
M.AbdollahiSabet at mail.sbu.ac.ir> wrote:
> Asif,
> Junxiao,
>
> Having wondered about the situation you explained, I tried to simulate a
> similar scenario. Produce node Pnode(responsible for /p prefix) is
> connected to other nodes than consumer node, directly. I tried with both
> default route(/) and GlobalRoutingHelper in place, separately. In both
> cases, forwarding strategy for all nodes was set to "multicast". But Pnode
> does not forward interests with /p in their name. For being sure, I've
> created another produce Onode responsible for /o prefix. My topology makes
> interest for prefix /o pass through Pnode. In Onode PIT I can see entries
> for /o. But no entry for /p is created because Onode does not receive
> interests for prefix /p form Pnode.
> Could you elaborate a bit more on the situation you're referring to?
>
> Thanks,
> Sabet
>
> ---------- Forwarded message ----------
> From: Shahid Md. Asif Iqbal <asifcsep at gmail.com>
> Date: Mon, Apr 4, 2016 at 10:30 AM
> Subject: Re: [ndnSIM] stop producer from forwarding interests
> To: Junxiao Shi <shijunxiao at email.arizona.edu>
> Cc: ndnsim <ndnsim at lists.cs.ucla.edu>
>
>
> Thanks Junxiao,
> You got my view point. Can you please specify which file(s) I need to work
> out with.
>
> Thanks,
> Asif
>
> On Sun, Apr 3, 2016 at 11:07 PM, Junxiao Shi <shijunxiao at email.arizona.edu
> >
> wrote:
>
> > Hi Asif
> >
> > As I understand, your scenario is:
> >
> > - The network has multiple nodes.
> > - A producer application is running on the node P, and it serves
> > contents under namespace ndn:/P.
> > - Node P is using the multicast strategy.
> > - Node P has a default route ndn:/ toward other peer nodes such as Q
> > and R.
> > - You are observing that, when an Interest starting with ndn:/P is
> > received by node P, it's not only forwarded to the producer
> application,
> > but also forwarded to Q and R.
> > - You want the Interest to be forwarded only to the producer
> > application, but not to other nodes.
> >
> > The behavior occurs because the FIB entry ndn:/P contains not only the
> > producer application but also nodes Q and R. Although there isn't a route
> > ndn:/P toward Q or R, these two nexthops appear in the FIB entry due to
> > route inheritance (see NFD Developer Guide, "RIB Management - FIB
> Updater -
> > Route Inheritance Flags" section).
> > To achieve the desired behavior, the FIB entry ndn:/P should contain only
> > the producer application. One way to do that is setting the CAPTURE flag
> in
> > the prefix registration command sent from the producer application.
> >
> > Yours, Junxiao
> >
> > On Sun, Apr 3, 2016 at 12:32 AM, Shahid Md. Asif Iqbal <
> asifcsep at gmail.com
> > > wrote:
> >
> >> I was trying to mean that apart from answering an interest with data
> >> packet a producer forwards the same interest to other nodes connected to
> >> it. As, I found this while dealing with the multicast strategy. And, I
> want
> >> to stop the producer from doing that forwarding or broadcasting.
> >>
> >> On Sat, Apr 2, 2016 at 5:13 AM, Shahid Md. Asif Iqbal <
> asifcsep at gmail.com
> > > wrote:
> >
> >> How can I stop a producer from forwarding an interest requesting the
> >> content owned by itself? As, I found that producer do not stop interests
> >> while I was using some ideas with multicast strategy.
> >>
> >
> >
>
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>
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