Quality of Service
Configuring QoS Advanced Mode
Cisco 220 Series Smart Switches Administration Guide Release 1.1.0.x 264
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quality of services. Thus, a policy contains one or more flows, each with a
user-defined QoS.
• The QoS of a class map (flow) is enforced by the associating policer. There
are two type of policers: single policer and aggregate policer. Each policer
is configured with a QoS specification. A single policer applies the QoS to a
single class map, and then to a single flow, based on the policer QoS
specification. An aggregate policer applies the QoS to one or more class
maps, and thus one or more flows. An aggregate policer can support class
maps from different policies.
• Per-flow QoS is applied to flows by binding the policies to the desired
ports. A policy and its class maps can be bound to one or more ports, but
each port is bound with at most one policy.
When configuring the QoS advanced mode, note the following:
• An ACL can be configured to one or more class maps regardless of policies.
• A class map can belong to only one policy.
• When a class map using single policer is bound to multiple ports, each port
has its own instance of single policer; each applying the QoS on the class
map (flow) at a port independent of each other.
• An aggregate policer will apply the QoS to all of its flows in aggregation
regardless of policies and ports.
Advanced QoS settings consist of three parts:
• Definition of the rules to match. All frames matching a single group of rules
are considered to be a flow.
• Definition of the actions to be applied to frames in each flow that match the
rules.
• Binding of the combinations of rules and action to one or more interfaces.
To configure QoS advanced mode, perform the following:
STEP 1 Select the QoS advanced mode for the system on the QoS Properties page, as
described in the Configuring QoS Properties section.
STEP 2 Select the trust mode for QoS advanced mode on the Global Settings page, as
described in the Configuring Advanced QoS Global Settings section.
STEP 3 Create ACLs as described in the Creating ACLs Workflow section.
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