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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi Lan</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When forwarder <u>receives</u> a Nack from face A, it records on the PIT out-record of face A that a Nack has been received, and triggers the strategy. In case Data comes from face A in the future, this Data would still be accepted.</p><p class=MsoNormal>When strategy instructs forwarder to <u>send</u> a Nack to face B, it removes the PIT in-record of face B. In case the PIT entry is later satisfied by Data, face B would not receive a copy of this Data.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>To make ChronoSync work in the general case, we should design for the situation where /localhop is not used, even if there might be a workaround with /localhop.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Yours, Junxiao</p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:lanwang@memphis.edu">Lan Wang (lanwang)</a><br><b>Sent: </b>Thursday, July 7, 2016 17:20<br><b>To: </b><a href="mailto:shijunxiao@email.arizona.edu">Junxiao Shi</a><br><b>Cc: </b><a href="mailto:agawande@memphis.edu">Ashlesh Gawande (agawande)</a>; <a href="mailto:nfd-dev@lists.cs.ucla.edu">nfd-dev@lists.cs.ucla.edu</a><br><b>Subject: </b>Re: [Nfd-dev] Help needed with debugging duplicate Nonce</p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Junxiao, </span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>I have some questions about the specifics of the example that are best clarified through the nfd call, but here are some high-order questions:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>- Duplicate NACK is a problem because I think it will affect the pending interest information between the neighbors so their sync data packets won’t be able to propagate in time. What does a node do to its PIT when it sends/receives a duplicate NACK?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>- /localhop is fine for intradomain routing, because NLSR neighbors are one hop away from each other. But we don’t have to do this if we don’t have the duplicate NACK problem in the first place.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>- if we do have to use /localhop to remove the duplicate NACKs then we need to make sure that it only propagates one hop (not as implemented now).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div><div><div><div><div><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black'>Lan</span><o:p></o:p></p></div></div></div></div></div></div></div></body></html>