6You create port groups manually. All settings made for a port group apply to all the member ports of thegroup. For example, you can configure a traffic suppression threshold (see "Configuring StormSuppression on an Ethernet Interface") for multiple interfaces in bulk by assigning these interfaces to aport group.Note that even though the settings are made on the port group, they are saved on an interface basisrather than on a port group basis. Thus, you can only view the settings in the view of each interface byuse the display current-configuration or display this command.Follow these steps to configure a port group:To do… Use the command… RemarksEnter system view system-view —Create a port group and entermanual port group viewport-group manualport-group-name RequiredAssign Ethernet interfaces to theport group group-member interface-list RequiredEnabling the auto power-down function on an EthernetinterfaceTo save power, enable the auto power-down function on Ethernet interfaces. With this function, aninterface enters the power save mode if it has not received any packet for a certain period of time (thisinterval depends on the specifications of the chip, and is not configurable). When a packet arrives later,the interface enters its normal state.Follow these steps to enable auto power-down on an Ethernet interface:To do… Use the command… RemarksEnter system view system-view —Enter Ethernetinterface viewor port groupviewEnter Ethernetinterface viewinterface interface-typeinterface-numberUse either command.To enable auto power-down on anEthernet interface, enter Ethernetinterface view.To enable auto power-down on agroup of Ethernet interfaces, enterport group view.Enter portgroup viewport-group manualport-group-nameEnable auto power-down on anEthernet interface port auto-power-down RequiredDisabled by defaultConfiguring traffic storm protectionA traffic storm occurs when a large amount of broadcast, multicast, or unknown unicast packets congesta network. The S5120-SI switches provide two storm protection approaches:• Storm suppression, which enables you to limit the size of monitored traffic passing through anEthernet interface by setting a traffic threshold. When the traffic threshold is exceeded, the interfacediscards all exceeding traffic.
