Dell PowerConnect 5548 User Guide - Page 669

• If you bind a policy map to more than one port and one of its classes contains a single policer, all policy map rules will be multiplied per port (using up more TCAM resources). • An aggregate policer applies the QoS to all of its flows in aggregation, regardless of policies and ports. Advanced QoS settings consist of the following elements: • Rules - All frames matching a single group of rules are considered to be a flow. • Actions - To be applied to frames in each flow that match the rules. - Policers - See "Single Policers" on page 679 - Aggregate Policers - "Aggregate Policers" on page 677 - Trust -"Interface Settings" on page 664, "Policy Class Maps" on page 682 - Set DSCP/CoS - "Policy Class Maps" on page 682 - Set Queue - "DSCP Mapping" on page 670 • Binding - Combination of rules and actions that are bound to one or more interfaces. Workflow to Configure Advanced QoS Mode To configure Advanced QoS mode, perform the following: 1 Select Advanced mode for the system in the QoS Mode page. 2 If external DSCP values are different from those used on incoming packets, map the external values to internal values in the DSCP Rewrite page. 3 Create ACLs, as described in "Network Security" on page 92. 4 When ACLs are defined, create class maps and associate the ACLs with them in the Class Mapping pages. 5 Create a policy map in the Policy Class Maps pages, and associate the policy map with one or more class maps. Specify the QoS action, if needed, for example by assigning a policer to a class map, when you associate the class map to the policy. Dell PowerConnect 55xx Systems User Guide 669