Operation Manual – Port Basic ConfigurationH3C S7500 Series Ethernet Switches Chapter 1 Port Basic Configuration1-3the system drops the packets exceeding the traffic limit to reduce the traffic ratio of thistype to the reasonable range, so as to keep normal network service.Follow these steps to configure broadcast/multicast suppression:To do… Use the command… RemarksEnter system view system-view —Enter Ethernet portviewinterface interface-typeinterface-number —Limit broadcast trafficreceived on the currentportbroadcast-suppression{ ratio | bandwidthbandwidth | pps pps }OptionalBy default, the switchdoes not suppressbroadcast traffic.Limit multicast trafficreceived on the currentportmulticast-suppression{ ratio | bandwidth{ mbps-value | kbpskbps-value } | pps max-pps }OptionalBy default, the switchdoes not suppressmulticast traffic.Note:z Broadcast suppression is set in different ways for different LPUs of the S7500 seriesswitches: For type-A LPUs, broadcast suppression must be set in VLAN view; fornon-type-A LPUs, broadcast suppression must be set in Ethernet port view.z Type-A LPUs include LS81FT48A, LS81FM24A, LS81FS24A, LS81GB8UA, andLS81GT8UA.1.1.3 Enabling Flow Control on a PortWhen flow control is enabled on both the local and peer switches, if congestion occurson the local switch:z The local switch sends a message to notice the peer switch to stop sendingpackets to the local switch or reduce the packet sending speed temporarily.z The peer switch will stop sending packets to the local switch or reduce the sendingspeed when it receives the message. In this way, packet loss is avoided and thenetwork service operates normally.Follow these steps to enable flow control on a port:To do… Use the command… RemarksEnter system view system-view —Enable flow controlglobally flow-control enableRequiredBy default, flow control isdisabled globally.
