XBT_DEBUG("\tAdd PTP from %d to %d bw:'%s' lat:'%s'",src,dst,bw,lat);
pointToPoint.SetDeviceAttribute ("DataRate", ns3::StringValue (bw));
pointToPoint.SetChannelAttribute ("Delay", ns3::StringValue (lat));
XBT_DEBUG("\tAdd PTP from %d to %d bw:'%s' lat:'%s'",src,dst,bw,lat);
pointToPoint.SetDeviceAttribute ("DataRate", ns3::StringValue (bw));
pointToPoint.SetChannelAttribute ("Delay", ns3::StringValue (lat));