obs网络试验平台，14个网络节点的NSF网络。-A Basic familiarity with ns architecture is recommended before making the following changes. The ns-2 extensions for OBS is currently an ongoing development effort. Some of the components of the OBns is still undergoing

ERROR ON DIFFERENT MODEL VERSION OPNET FOR EXAMPLE IF WE HAVE IEEE802.15.4 MODEL ON VERSION 14.5 THIS MODEL CAN NOT WORK ON OTHER VERSION LIKE OPNET 14.5A -ERROR ON DIFFERENT MODEL VERSION ON OPNET FOR EXAMPLE IF WE HAVE IEEE802.15.4 MODEL ON VERSION