Web Management Guide-R01

Chapter 10 | Quality of Service
Creating QoS Policies
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To show the rules for a class map:
1. Click Traffic, DiffServ.
2. Select Configure Class from the Step list.
3. Select Show Rule from the Action list.
Figure 156: Showing the Rules for a Class Map
Creating QoS Policies
Use the Traffic > DiffServ (Configure Policy) page to create a policy map that can be
attached to multiple interfaces. A policy map is used to group one or more class
map statements (page 254), modify service tagging, and enforce bandwidth
policing. A policy map can then be bound by a service policy to one or more
interfaces (page 267).
Configuring QoS policies requires several steps. A class map must first be
configured which indicates how to match the inbound packets according to an
access list, a DSCP or IP Precedence value, or a member of specific VLAN, a CoS
value, or a source port. A policy map must then be configured to indicate the
boundary parameters used for monitoring inbound traffic, and the action to take
for conforming and non-conforming traffic. A policy map may contain one or more
classes based on previously defined class maps.
The class of service or per-hop behavior (i.e., the priority used for internal queue
processing) can be assigned to matching packets. In addition, the flow rate of
inbound traffic can be monitored and the response to conforming and non-
conforming traffic based by one of three distinct policing methods as described
below.
Police Flow Meter – Defines the committed information rate (maximum
throughput), committed burst size (burst rate), and the action to take for
conforming and non-conforming traffic.