94 CHAPTER 3: E THERNET INTERFACE CONFIGURATIONn If you set the suppression ratio in interface view or port group view repeatedly, thelast configuration takes effect.Configuring the Intervalfor Collecting EthernetInterface StatisticsComplete the following configuration tasks to configure the time interval forcollecting interface statistics. Use the display interface command to display theinterface statistics within this time interval.Follow these steps to configure the interval for collecting interface statistics:This configuration applies to all the Layer 2 ports.Enabling LoopbackDetection on anEthernet InterfaceThe purpose of loopback detection is to detect loops on an interface.When loopback detection is enabled on an Ethernet interface, the device willroutinely check whether the ports have any external loopback. If it detects aloopback on a port, the device will turn that port under loopback detection mode.■ If loops are detected on a port that is of access type, the port will be shutdown.Meanwhile, trap messages will be sent to the terminal, and the correspondingMAC address forwarding entries will be removed.EnterEthernetinterfaceview or portgroup viewEnterEthernetinterfaceviewinterface interface-typeinterface-numberUse either commandConfigured in interface view,the setting is effective only onthe current interface; configuredin port group view, the setting iseffective on all the ports in thecurrent port group.Enter portgroup viewport-group { manualport-group-name |aggregation agg-id }Configure the broadcaststorm suppression ratio orthe maximum PPS allowedon the Ethernet interfacebroadcast-suppression{ ratio | pps max-pps }OptionalCurrently, the ratio argumentcan only be 100; and themax-pps argument can be 190,380, 760, 1488, 2976, 5952, or11904.Configure multicast stormsuppression ratio or themaximum PPS allowed onthe Ethernet interfacemulticast-suppression{ ratio | pps max-pps }OptionalCurrently, the ratio argumentcan only be 100; and themax-pps argument can be 190,380, 760, 1488, 2976, 5952, or11904.Configure the unknownunicast storm suppressionratio or the maximum PPSallowed on the Ethernetinterfaceunicast-suppression { ratio |pps max-pps }OptionalCurrently, this command is notsupported.To do... To use... RemarksTo do... Use the command... RemarksEnter system view system-view -Configure the timeinterval for collectinginterface statisticsflow-interval interval OptionalThe default interval for collectinginterface statistics is 300 seconds.
