D-Link DWS-4026 Product Manual - Page 333

Software User Manual 12/10/09 D-Link Unified Access System Field Policy Attribute Selector Table 210: Policy Class Definition Fields (Cont.) Description The menu lists all attributes supported for this type of policy, from which one can be selected. To configure the attributes, select an attribute from the list, and then click Configure Selected Attribute. The screen changes to the attribute configuration page for that attribute. After you configure the attribute, click Submit to apply the criteria to the class and return to the Policy Class Definition page. To return to the Policy Class Definition page without applying the attribute, click Cancel. The attributes and configurable fields are as follows: • Assign Queue: Assigns the packets of this policy-class to a queue. Enter an integer from 0-7 in the Queue Id Value field. • Drop Packets: Select this field to drop packets for this policy-class. There are no fields to configure. Once you select Drop, click Configure Select Attribute, and then click Submit, the attribute is added to the policy. • Mark CoS: Enter the specified Class of Service queue number to mark all packets for the associated traffic stream with the specified class of service value in the priority field of the 802.1p header (the only tag in a single tagged packet or the first or outer 802.1Q tag of a double VLAN tagged packet). If the packet does not already contain this header, one is inserted. The CoS value is an integer from 0 to 7. • Mark IP DSCP: Use this attribute to mark all packets for the associated traffic stream with IP DSCP value you choose from the menu. • Mark IP Precedence: Use this attribute to mark all packets for the associated traffic stream with the IP Precedence value you enter in the IP Precedence Value field. • Police Simple: Use this attribute to establish the traffic policing style for the specified class. The simple form of the police command uses a single data rate and burst size, resulting in two outcomes: conform and violate. The conforming data rate is specified in kilobits-per-second (Kbps) and is an integer from 1 to 4294967295. The conforming burst size is specified in kilobytes (KB) and is an integer from 1 to 128. The Police Simple attribute configuration page has the following configurable fields: - Color Mode: Color Aware mode requires the existence of one or more color classes that are valid for use with this policy instance. A valid color class contains a single, non-excluded match criterion for one of the following fields (provided the field does not conflict with the classifier of the policy instance itself): •IP DSCP •IP Precedence - Conform Action Selector: Determines what happens to packets that are considered conforming (below the police rate). Select one of the following actions: •Send: (default) These packets are presented unmodified by DiffServ to the system forwarding element. •Drop: These packets are immediately dropped. •Mark CoS: These packets are marked by DiffServ with the specified CoS value before being presented to the system forwarding element. This selection requires that the Mark CoS value field be set. •Mark IP DSCP: These packets are marked by DiffServ with the specified DSCP value before being presented to the system forwarding element. This selection requires that the DSCP value field be set. •Mark IP Precedence: These packets are marked by DiffServ with the specified IP Precedence value before being presented to the system forwarding element. This selection requires that the Mark IP Precedence value field be set. Document 34CSFP6XXUWS-SWUM100-D7 Configuring Differentiated Services Page 333