[ndnSIM] Per-interface (face?) statistics?

[Alex Afanasyev]

> On Jan 7, 2017, at 10:40 PM, John Baugh <jpbaugh at umich.edu> wrote:
> 
> Prof. Zhang,
> 
> It is an honor to hear from you.  Thank you for your reply.
> 
> 1.  What I mean by "connected" in the context of my simulation that I'm preparing is that, for a simple case, I have used the AppHelper to create ConsumerCbr nodes (although others, such as ZipfMandelbrot could be used in the future, I assume) --I install links using a PointToPointHelper in a configuration like so:
> 
>       [consumer] <---> [router] <---> [producer]
>       [consumer] <--------^
> 
> Is the default behavior such that an individual Face is created between each consumer and the router?  

Hi John,

If you're using PointToPointHelper (or the AnnotatedTopologyReader) then you have a one-to-one correspondence between the link and the created Face.  However, you can use other links (and not yet implemented face implementations for ndnSIM) where one link may correspond to more than one face.  This, for example, could be with WiFi links.

> 2.   I ask the above, because I don't explicitly designate a face when creating a link.  
> 
> Thanks,
> 
> John
> 
> On Sun, Jan 8, 2017 at 1:26 AM, Lixia Zhang <lixia at cs.ucla.edu <mailto:lixia at cs.ucla.edu>> wrote:
> 
> > On Jan 7, 2017, at 10:15 PM, John Baugh <jpbaugh at umich.edu <mailto:jpbaugh at umich.edu>> wrote:
> >
> > ndnSIM friends,
> >
> > I'm mostly just mulling over some ideas about this for the time being, but I'd like to get some information from anyone reading this, with some insight.
> >
> > Consider several Consumers connected to a router,
> 
> I assume you meant consumers *physically* connected to a router (i.e. via a layer-2 connectivity)
> 
> > which is then connected to a Producer (or multiple producers - just consider one for now)
> >
> > 1.  Is it correct for me to assume that each connection between a Consumer at the router is a Face (interface?) or is there any sharing?  E.g., do consumers 1, 2, 3, 4, etc. ever connect to the Producer with the same face?
> 
> it is up to what is that layer-2 connection is, whether each consumer is connected by a separate wire, or all consumers share the same media (e.g. Ethernet)
> 
> 
> > 2.  I'm trying to see what would happen if an attacker hijacked a node or nodes at focused their attack on an individual interface (face), so is this equivalent to compromising one or more consumers?
> >     -->  In other words is there a one-to-one correspondence between the Face and the Consumer always?  If not, when is this not the case and can it be controlled?
> >
> > Thanks,
> >
> > John
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