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--></style></head><body lang=EL><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I’m currently working on creating a simple trust mechanism in ndnSIM. In order to achieve this,I have created a consumer and a producer application, based on provided codes of costum-app and hijacker applications. I have used a tree topology in which I have installed the consumer application on 10 leaves, the producer application on other 10 leaves and an extra application on root. The functionality of my mechanism is the above:<o:p></o:p></span></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Consumers send interests for data packets</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Producers reply with data packets</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Consumers rate the received data packets</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Root periodically sends interests to consumers serially requesting average rating per producer</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Consumers reply with data packets providing the average rating per producer and number of ratings they used</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Root based on data collected computes the reputation of each producer</span><o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Two extra consumers send interests periodically requesting the reputation of a randomly selected producer</span><o:p></o:p></li></ol><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>My code works as expected with the tree topology. Then I tried to import GEANT topology and implement my mechanism there. I selected the nodes with the 1 or 2 neighbors to install consumers and producers, as it is on a tree topology. This time, although FIB tables seem to be filled correctly, when sending an interest it gets rejected and returns a nack with “no route” reason. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Do you have any possible explanation for that, or a suggestion for what I should check?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks in advance,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Ioanna</span><o:p></o:p></p></div></body></html>