1-3z Only combo optical ports on the front panel of the device support the auto-negotiation speedconfiguration feature. And ports on the extended interface card do not support this featurecurrently.z After you configure auto-negotiation speed(s) for a port, if you execute the undo speed commandor the speed auto command, the auto-negotiation speed setting of the port restores to the defaultsetting.z The effect of executing speed auto 10 100 1000 equals to that of executing speed auto, that is,the port is configured to support all the auto-negotiation speeds: 10 Mbps, 100 Mbps, and 1000Mbps.Limiting Traffic on individual PortsBy performing the following configurations, you can limit the incoming broadcast/multicast/unknownunicast traffic on individual ports. When a type of incoming traffic exceeds the threshold you set, thesystem drops the packets exceeding the traffic limit to reduce the traffic ratio of this type to thereasonable range, so as to keep normal network service.Follow these steps to limit traffic on port:To do... Use the command... RemarksEnter system view system-view —Limit broadcast traffic received oneach portbroadcast-suppression { ratio |pps max-pps }OptionalBy default, the switch does notsuppress broadcast traffic.Enter Ethernet port view interface interface-typeinterface-number —Limit broadcast traffic received onthe current portbroadcast-suppression { ratio |pps max-pps }OptionalBy default, the switch does notsuppress broadcast traffic.Limit multicast traffic received onthe current portmulticast-suppression { ratio |pps max-pps }OptionalBy default, the switch does notsuppress multicast traffic.Limit unknown unicast trafficreceived on the current portunicast-suppression { ratio | ppsmax-pps }OptionalBy default, the switch does notsuppress unknown unicast traffic.Enabling Flow Control on a PortFlow control is enabled on both the local and peer switches. If congestion occurs on the local switch:z The local switch sends a message to notify the peer switch of stopping sending packets to itselftemporarily.
