SGS-6340 Series User Manual

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Policing and remark: Each packet in classified ingress traffic is assigned an internal priority
value and a drop precedence value, and can be policed and remarked.
Policing can be performed based on the flow to configure different policies that allocate
bandwidth to classified traffic, the assigned bandwidth policy may be dual bucket dual color or
dual bucket three color. The traffic, will be assigned with different color, can be discarded or
passed, for the passed packets, add the remarking action. Remarking uses a new DSCP value
of lower priority to replace the original higher level DSCP value in the packet. The following
flowchart describes the operations.
Figure 23-5: Policing and Remarking process
Queuing and scheduling: There are the internal priority and the drop precedence for the
egress packets; the queuing operation assigns the packets to different priority queues
according to the internal priority, while the scheduling operation perform the packet forwarding
according to the priority queue weight and the drop precedence. The following flowchart
describes the operations during queuing and scheduling.