Use, configuration and points for attention of network layer protocol (taking QoS as an example) when using OPNET for network simulation

This article only focuses on Qos Design and configuration of relevant strategies , Configuration of network multicast and unicast , It has been discussed before , Please look through 《 utilize OPNET Network unicast （ One server with multiple clients ） Design of simulation 、 Configuration and precautions 》 as well as 《 utilize OPNET Conduct network multicast (ASM) Design of simulation 、 Configuration and precautions 》 Two articles .

One 、 Set an application scenario

1. To configure RED Strategy .
2. Configure traffic shaping , The speed limit 2Mbps.
3. To configure CAR Traffic monitoring .
4. Configure layer 2 PQ agreement , Three layers WFQ agreement , Traffic is differentiated based on business , namely DSCP.

Two 、 Specific configuration

1. add to Qos Configurator , namely Qos Attribute Config, At this point, the topology is as follows ：
   
   2. modify FIFO Strategies for RED. open QOS Configurator properties ,FIFO Profiles->FIFO Profile->Details->RED Parameters, choice RED.
   3. Modification requires configuration QOS Strategic network devices , I choose to configure it on the port of the router connecting to the server . In this case , The router port connected to the server is IF2, I will Qos Configuration of , Configure on port .IP->IP Qos Parameters->Interface Information, Make the following configuration ：
   

3、 ... and 、 Be careful

1. opnet Properties of all network protocols in , The same as the use of hardware , It is instantiation into a configurator , This configurator is equivalent to a large container , The network protocol you want to configure accordingly , You have to configure it first , Then select directly when calling .
2. opnet Provides configurators for many network protocols , such as QoS Configurator for , You can choose applications flexibly .
3. Again opnet Use logic of network protocol in , It is basically consistent with the logic in the actual configuration . Before configuration , The logic of the protocol to be configured should be sorted out , Find out the needs .
4. Use of protocol , such as QoS agreement , It can be configured as global or interface , See personal demand configuration .