Qos->Policy Config->Create Classifier - Symbol ES3000 User Manual

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4.2.42 QoS->Policy Config->Create Classifier
The ES3000 implements IEEE 802.1p Quality of Service (QoS) processing. QoS policies examine
packets and classify them. The classification is used to drop packets or assign markers to the packets.
The markers are Class of Service (CoS) Priority, Type of Service (ToS) Precedence and Differentiated
Services Code Points (DSCP). For each port, the outgoing packets are placed in four output queues
based on CoS priority or DSCP value. The queues are serviced using a weighted round robin algorithm.
There are two means to differentiate ES3000 traffic, VLAN tags or Differentiated Service Code Points
(DSCP) in the header of packets. By using either VLAN tags (port-based) or DSCP (DiffServ), configure
the switch so specific traffic takes priority over less critical traffic.
Choose to further differentiate packet priority by using the Differentiated Service (DiffServ) feature.
DiffServ uses a priority tag in the packet, the Differentiated Service Code Point (DSCP), to determine
the priority of the packet. This menu maps the various DSCP tags to the two queues in the switch.
Click the classifier configuration to display the Create Classifier page.