Operation Manual – MulticastH3C S7500 Series Ethernet Switches Chapter 4 Common Multicast Configuration4-3To do... Use the command... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Configure suppression onthe multicast source portin Ethernet port viewmulticast-source-denyenableOptionalSuppression on themulticast source port isdisabled on all ports of theswitch by default.4.2.3 Configuring Suppression on Multicast Wrongif PacketsI. IntroductionWhen the switch receives a multicast packet, the switch will search the multicastforwarding entry according to the source address and destination address of the packet.If the matching forwarding entry is found and the packet is received on the rightincoming interface of the forwarding entry, the packet will be forwarded according to theforwarding entry. If the packet is not received on the right incoming interface of theforwarding entry, the packet is regarded as a wrongif packet. The wrongif packet will bereported to the CPU.In some network, many wrongif packets will be reported to the CPU of the switch, thusaggravating the workload of the switch. In this case, you can configure suppression onthe holdtime of wrongif packets, so that the wrongif packets will be dropped instead ofbeing forwarded to the CPU of the switch, and the CPU will be prevented from beingstricken by too many packets.II. Suppression on the holdtime of multicast wrongif packetsFollow these steps to configure suppression on the holdtime of multicast wrongifpackets:To do... Use the command... RemarksEnter system view system-view —Configure suppression onthe holdtime of multicastwrongif packetsmulticastwrongif-holdtimesecondsRequiredBy default, the holdtime ofmulticast wrongif packetsis 15 seconds.
