[ndnSIM] Link failure scenario and forwarding failed to send packet with different path

Spyridon (Spyros) Mastorakis spiros.mastorakis at gmail.com
Fri Jul 10 14:37:03 PDT 2015

Hi Hitesh,

probably the Interests are being rejected by a further node across the forwarding path.

You could enable the nfd.Forwarder logging component to monitor the Interest/Data exchange:

NS_LOG=ndn.Producer:ndn.Consumer:nfd.Forwarder ./waf --run scenario_name

Spyridon (Spyros) Mastorakis
Personal Website: http://cs.ucla.edu/~mastorakis/
Internet Research Laboratory
PhD Computer Science

> On Jul 10, 2015, at 8:13 AM, Hitesh Wadekar <wadekahn at clarkson.edu> wrote:
> Hello Friends,
> I am experimenting a scenario and here is the steps for it,
> 1. I configured app as "BestRoute"
> 2. I created 6 node topology
> 3. I set many paths in FIB for that destination with different faces.
> 4. I scheduled LinkFail with the help of LinkControlHelper between two nodes.
> I checked the code for LinkControlHelper, it is setting error code for that particular (face, channel) which destination has connected.
> Here is what happening,
> a. BestRoute picking up same path (linkfailure) to send packet/interest to the destination as it is lowest cost.
> b. Later I removed that prefix manually, BestRoute is able to pick up next path (different face), but still packet/interest is not able to communicate with the destination.
> I confused here what to check or test in order to send packet to that destination with different faces.
> Let me know your point of views or suggestions.
> Regards,
> Hitesh

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