1-8DSCP Local precedence32 to 47 248 to 63 3Priority MarkingThe priority marking function is to reassign priority for the traffic matching an ACL referenced for trafficclassification.z If 802.1p priority marking is configured, the traffic will be mapped to the local precedencecorresponding to the re-marked 802.1p priority and assigned to the output queue corresponding tothe local precedence.z If local precedence marking is configured, the traffic will be assigned to the output queuecorresponding to the re-marked local precedence.z If DSCP marking is configured, the traffic will be marked with new DSCP precedence.Traffic PolicingThe network will be made more congested by plenty of continuous burst packets if the traffic of eachuser is not limited. The traffic of each user must be limited in order to make better use of the limitednetwork resources and provide better service for more users. For example, a traffic flow can be limitedto get only its committed resources during a time period to avoid network congestion caused byexcessive bursts.Traffic policing is a kind of traffic control policy used to limit the traffic and the resource occupied bysupervising the traffic. The regulation policy is implemented according to the evaluation result on thepremise of knowing whether the traffic exceeds the specification when traffic policing is performed.Normally, token bucket is used for traffic evaluation.Token bucketThe token bucket can be considered as a container with a certain capacity to hold tokens. The systemputs tokens into the bucket at the set rate. When the token bucket is full, the extra tokens will overflowand the number of tokens in the bucket stops increasing.
