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Chapter 5: Using the Web-based Utility for Configuration
QoS Tab - Diffserv Settings
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Policy Map
A policy map can contain multiple class statements that can be applied to the same interface with the Service
Policy Settings. You can configure up to 63 policers (that is, class maps) for Fast Ethernet and Gigabit Ethernet
ingress ports.
Policing is based on a token bucket, where bucket depth (that is, the maximum burst before the bucket
overflows) is by specified the “Burst” field, and the average rate tokens are removed from the bucket is by
specified by the “Rate” option.
After using the policy map to define packet classification, service tagging, and bandwidth policing, it must be
assigned to a specific interface by a service policy to take effect.
Policy name. The name of the policy map. (Range: 1-32 characters for the name)
Description. A brief description of the Policy. (Range 1-256 characters for the description)
Click Add to create a new policy, or select a policy and click “Edit Policy Element” to change the policy rules of
the selected policy, or Remove Policy to delete the policy.
Class Name. Name of class map. Use the drop-down menu to select a different policy.
Action. Configures the service provided to ingress traffic by setting a CoS, DSCP, or IP Precedence value in a
matching packet. (Range - CoS: 0-7, DSCP: 0-63, IP Precedence: 0-7)
Enable Meter. Check this to define the maximum throughput, burst rate, and the action that results from a policy
violation.
• Rate (kbps) – Rate in kilobits per second. (Range: 1-100000 kbps or maximum port speed, whichever is
lower)
• Burst (byte) – Burst in bytes. (Range: 64-1522)Exceed. Specifies whether the traffic that exceeds the
specified rate or burst will be dropped or the DSCP service level will be reduced.
• Exceed Action – Specifies whether the traffic that exceeds the specified rate or burst will be dropped or the
DSCP service level will be reduced.
Set – Decreases DSCP priority for out of conformance traffic. (Range: 0-63).
Drop – Drops non-conforming traffic.
Add. Adds the specified criteria to the policy map.
Remove. Deletes a class from a policy.
Figure 5-40: QoS - Diffserv Settings - Edit Policy Element
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