Operation Manual – QoS-QoS ProfileH3C S5600 Series Ethernet Switches Chapter 1 QoS Configuration1-12Traffic policing is widely used in policing the traffic into the network of internet serviceproviders (ISPs). Traffic policing can identify the policed traffic and perform pre-definedpolicing actions based on different evaluation results. These actions include:z Drop. Drop the packet whose evaluation result is “nonconforming”.z Modify the DSCP precedence and forward. Modify the DSCP precedence of thepackets whose evaluation result is “nonconforming” and then forward them.1.3.6 Line RateLine rate refers to limiting the total rate of outbound packets on a port.Line rate can be implemented through token buckets. That is, if you perform line rateconfiguration for a port, the token bucket determines the way to process the packets tobe sent by this port or packets reaching the port. Packets can be sent or received ifthere are enough tokens in the token bucket; otherwise, they will be dropped.Compared to traffic policing, line rate applies to all the packets passing a port. It is asimpler solution if you want to limit the rate of all the packets passing a port.1.3.7 Traffic RedirectingTraffic redirecting identifies traffic using ACLs and redirects the matched packets toCPU, the specified ports/aggregation group. By traffic redirecting, you can change theway in which a packet is forwarded to achieve specific purposes.1.3.8 VLAN MappingVLAN mapping identifies traffics using ACLs and maps the VLAN tags carrier inmatched packets to specific VLAN tags. By employing VLAN mapping on a switchconnecting user networks to the carrier network, you can map the VLAN tags of specificuser network packets to those of specific VLANs in the carrier network, thus meetingthe requirements of the carrier network.1.3.9 Queue SchedulingWhen the network is congested, the problem that many packets compete for resourcesmust be solved, usually through queue scheduling.The S5600 series switches support Strict Priority (SP) queuing and Weighted RoundRobin (WRR) queuing.1) SP queuing
