[ndnSIM] Relationship between ndnSIM (2.0) and NFD.

[Anil Jangam]

Hi,

In ndnSIM 2.0, is it required to run the NFD in the background for the
simulator to run? I want to understand the relationship of NFD wrt ndnSIM.

The release notes of ndnSIM 2.0 says that NDN forwarding and management is
implemented using NFD source. What does this really mean? For example, when
we configure the face-uri of the link between the nodes in the scenario, do
we have to provide a real IP address and port or just any arbitrary name
(e.g. udp://cs.com) would work?

The initial 3 node scenario that I am currently testing, I am getting the
following exception.

Installing NDN stack on nodes
Installing global routing interface on nodes
terminate called after throwing an instance of 'ndn::Transport::Error'
  what():  error while connecting to the forwarder

Thread [1] 4723 [core: 2] (Suspended : Signal : SIGABRT:Aborted)
__GI_raise() at raise.c:56 0x7fffe90a1cc9
__GI_abort() at abort.c:89 0x7fffe90a50d8
__gnu_cxx::__verbose_terminate_handler() at 0x7fffe99ac6b5
0x7fffe99aa836

std::terminate() at 0x7fffe99aa863
__cxa_rethrow() at 0x7fffe99aaaf6
ndn::Face::processEvents() at face.cpp:445 0x7ffff5ac9572
ns3::ndn::NlsrApp::startEventLoop() at ndn-nlsr-app.cpp:288 0x7ffff58b47da
ns3::ndn::NlsrApp::StartApplication() at ndn-nlsr-app.cpp:346
0x7ffff58b4e6c
ns3::EventMemberImpl0::Notify() at make-event.h:94 0x7fffef3643b6

<...more frames...>

I looked for references the error, and it says (according to this
<http://named-data.net/doc/NLSR/0.1.0/ROUTER-CONFIG.html> note), that NFD
is not running.

I have configured the node as follows.

0s 0 ConfParameter:writeLog(): [DEBUG] Router Name: /cs/memphis/rtr0
0s 0 ConfParameter:writeLog(): [DEBUG] Site Name: /edu/memphis
0s 0 ConfParameter:writeLog(): [DEBUG] Network: /ndn
0s 0 ConfParameter:writeLog(): [DEBUG] Router Prefix:
/ndn/edu/memphis/cs/memphis/rtr0
0s 0 ConfParameter:writeLog(): [DEBUG] ChronoSync sync Prefix:
/ndn/NLSR/sync
0s 0 ConfParameter:writeLog(): [DEBUG] ChronoSync LSA prefix: /ndn/NLSR/LSA
0s 0 ConfParameter:writeLog(): [DEBUG] Hello Interest retry number: 10
0s 0 ConfParameter:writeLog(): [DEBUG] Hello Interest resend second: 1
0s 0 ConfParameter:writeLog(): [DEBUG] Info Interest interval: 60
0s 0 ConfParameter:writeLog(): [DEBUG] LSA refresh time: 1800
0s 0 ConfParameter:writeLog(): [DEBUG] LSA Interest lifetime: 4 seconds
0s 0 ConfParameter:writeLog(): [DEBUG] Router dead interval: 3600
0s 0 ConfParameter:writeLog(): [DEBUG] Max Faces Per Prefix: 3
0s 0 ConfParameter:writeLog(): [DEBUG] Hyperbolic Routing: 0
0s 0 ConfParameter:writeLog(): [DEBUG] Hyp R: 123.45
0s 0 ConfParameter:writeLog(): [DEBUG] Hyp theta: 1.45
0s 0 ConfParameter:writeLog(): [DEBUG] Log Directory:
0s 0 ConfParameter:writeLog(): [DEBUG] Seq Directory:
0s 0 ConfParameter:writeLog(): [DEBUG] Adjacency LSA build interval: 5
0s 0 ConfParameter:writeLog(): [DEBUG] First Hello Interest interval: 10
0s 0 ConfParameter:writeLog(): [DEBUG] Routing calculation interval: 15
0s 0 AdjacencyList:writeLog(): [DEBUG] -------Adjacency List--------
0s 0 AdjacencyList:writeLog(): [DEBUG] Number of neighbors: 1
0s 0 Adjacent:writeLog(): [DEBUG] Adjacent : /toNode
0s 0 Adjacent:writeLog(): [DEBUG] Connecting FaceUri: udp://cs.com
0s 0 Adjacent:writeLog(): [DEBUG] Link Cost: 20
0s 0 Adjacent:writeLog(): [DEBUG] Status: 0
0s 0 Adjacent:writeLog(): [DEBUG] Interest Timed out: 0
0s 0 NlsrApp:initialize(): [DEBUG] Default NLSR identity: /
0s 0 NlsrApp:setInfoInterestFilter(): [DEBUG] Setting interest filter for
name: /ndn/edu/memphis/cs/memphis/rtr0
0s 0 NlsrApp:setLsaInterestFilter(): [DEBUG] Setting interest filter for
name: /ndn/NLSR/LSA/


Can you please elaborate.

/anil.
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