examples: Restoring old examples that can be restored and fixing existing ones
diff --git a/examples/ndn-simple-with-pcap.cpp b/examples/ndn-simple-with-pcap.cpp
index e26866b..12a0cbb 100644
--- a/examples/ndn-simple-with-pcap.cpp
+++ b/examples/ndn-simple-with-pcap.cpp
@@ -24,6 +24,20 @@
#include "ns3/point-to-point-module.h"
#include "ns3/ndnSIM-module.h"
+/**
+ * This scenario demonstrates how to dump raw NDN packets into tcpdump-format
+ *
+ * Run scenario:
+ *
+ * ./waf --run ndn-simple-with-pcap
+ *
+ * After simulation finishes, it produces `ndn-simple-trace.pcap` that can be read
+ * using tcpdump or ndndump tools:
+ *
+ * ndndump -r ndn-simple-trace.pcap not ip
+ * tcpdump -r ndn-simple-trace.pcap
+ */
+
namespace ns3 {
class PcapWriter {