ndnSIM

    int faceNumber = 0;

    std::vector<uint16_t> originalMetric(uint32_t(l3->getForwarder()->getFaceTable().size()));

    for (auto& i : l3->getForwarder()->getFaceTable()) {

      shared_ptr<Face> nfdFace = std::dynamic_pointer_cast<Face>(i);

      originalMetric[uint32_t(faceNumber)] = nfdFace->getMetric();

      nfdFace->setMetric(std::numeric_limits<uint16_t>::max() - 1);

      // value std::numeric_limits<uint16_t>::max () MUST NOT be used (reserved)

    }

      }

      // enabling only faceId

      boost::DistancesMap distances;

    // recover original interface statuses

    faceNumber = 0;

    for (auto& i : l3->getForwarder()->getFaceTable()) {

      shared_ptr<Face> face = std::dynamic_pointer_cast<Face>(i);

      face->setMetric(originalMetric[faceNumber]);

    }

  }

}