[Ndn-interest] CalculateRoutes

Thu Dec 3 03:13:43 PST 2015

Dear Alex

I'm planning on comparing different forwarding strategies in a PLC topology built using the ns-3 PLC module

To do so I change the forwarding strategy in each scenario and then run the simulation and collect  delay using ndnSim application  tracers

If I work with defaultroutes does this mean that I'm not using the forwording starategy ?

I doubted this because I'm having the same results with all the forwarding strategies !

I tried to use calculate routes to populate the FIB's but all the nodes are unreachable!!!

Does this mean that there is a problem with the PLC_channel ?!

Please help

De : Alexander Afanasyev [mailto:cawka1 at gmail.com] De la part de Alex Afanasyev
Envoyé : jeudi 17 juillet 2014 20:43
À : Nour El Houda Ben Youssef
Objet : Re: Using AddNetDeviceFaceCreateCallback

Somehow, plc network device or channel don't support working with multiple protocols.  If you check NetDeviceFace::Send, you'll see that Send operation specifies "L3Protocol::ETHERNET_FRAME_TYPE" as a protocol number.   During registering ndn protocol, NetDeviceFace::RegisterProtocolHandlers, the same protocol was specified.  Somehow, inside PLC module when packet arrives, it does not carry the proper protocol number and without the hack I suggested, NS-3 cannot properly dispatch packets to ndnSIM.

---
Alex

On Jul 17, 2014, at 12:56 AM, Nour El Houda Ben Youssef <NourElHouda.BenYoussef at oxia-group.com<mailto:NourElHouda.BenYoussef at oxia-group.com>> wrote:

Dear Alex
I'm really thankful, I don't know by which miracle but the maneuver worked just fine
I would like thought to understand what was the meaning of the changes that you recommended

Best regards

De : Alexander Afanasyev [mailto:cawka1 at gmail.com] De la part de Alex Afanasyev
Envoyé : mercredi 16 juillet 2014 06:13
À : Nour El Houda Ben Youssef
Objet : Re: Using AddNetDeviceFaceCreateCallback

You can try to replace L3Protocol::ETHERNET_FRAME_TYPE with 0 in ndn-net-device-face.cc<http://ndn-net-device-face.cc/>  (you may also set promisc mode to false).

Two days ago I was observing a similar behavior as you described with lr-wpan module and the hack solved the problem.

---
Alex

On Jul 15, 2014, at 8:21 PM, Nour El Houda Ben Youssef <NourElHouda.BenYoussef at oxia-group.com<mailto:NourElHouda.BenYoussef at oxia-group.com>> wrote:

Well frankly it wasn't without difficulties especially that I'm new with ns3,  but using this link was very helpful :https://github.com/jvaubourg/plc
There was also need to disable python bindings  before building the module and then I  regenerated, using the semi-automatic way, all python bindings for plc

Unfortunately I thought this was the hardest part but then I wasn't able to deploy ndn over a PLC topology :(
After running few examples I noticed that interests are being sent then received at PLC_netdevice level but not reaching higher layers
I think perhaps the problem is caused by PLC_mac
I hope you build PLC module and then figure out the problem !

Best regards

De : Alexander Afanasyev [mailto:cawka1 at gmail.com] De la part de Alex Afanasyev
Envoyé : mardi 15 juillet 2014 18:33
À : Nour El Houda Ben Youssef
Objet : Re: Using AddNetDeviceFaceCreateCallback

Ehm.. How did you manage to compile plc module in the first place? It seem to me that it works only with older version (ns-3.16), while the current ndnSIM was just rebased on top of ns-3.20...

Even after I fixed the problems with wscript, I still cannot build the code due to some errors...

---
Alex

On Jul 15, 2014, at 12:33 AM, Nour El Houda Ben Youssef <NourElHouda.BenYoussef at oxia-group.com<mailto:NourElHouda.BenYoussef at oxia-group.com>> wrote:

Thank you for your quick answer
Actually I do not need a particular initialization but ndn did not work over a PLC netdevice. I'm sure PLC netdevice works fine since I used it with Internet stack but when I try to deploy ndn stack over it interests are being sent but not received :( So I guessed it should need a customized callback
The PLC module that I'm using can be found in: https://github.com/ns3-plc-module
You can also find attached my script deploying ndn avec PLC

Your help is really appreciated
Best regards

De : Alexander Afanasyev [mailto:cawka1 at gmail.com] De la part de Alex Afanasyev
Envoyé : lundi 14 juillet 2014 18:39
À : Nour El Houda Ben Youssef
Objet : Re: Using AddNetDeviceFaceCreateCallback

Hi,

Technically, there is a default callback that should work with any class based on NetDevice.

The callback is needed when you need to do custom initialization of the face (=creating custom version of ndn::Face for the netdevice).  The example I have is here: https://github.com/cawka/ndnSIM-nom-rapid-car2car/blob/master/scenarios/car-relay.cc#L44

---
Alex

On Jul 14, 2014, at 3:23 AM, Nour El Houda Ben Youssef <NourElHouda.BenYoussef at oxia-group.com<mailto:NourElHouda.BenYoussef at oxia-group.com>> wrote:

Dear Alexander
I'm having trouble using ndnSim over a power line communication netdevice

I would like to ask if there is any example showing me how to define a new NetDeviceFace Callback

Best regards

Nour El Houda Ben Youssef Koubaa
Doctorante Mobidoc - OXIA/SAGE
Mastère nouvelle génération des systèmes d'informations - FST
Ingénieur Génie Logiciel - INSAT

<ndnPLC.cc<http://ndnplc.cc/>>

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