Chapter 16 Quality of Service (QoS)
P-870HN-51b User’s Guide
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queues). Your Device uses the Token Bucket algorithm to allow a certain amount
of large bursts while keeping a limit at the average rate.
Traffic Policing
Traffic policing is the limiting of the input or output transmission rate of a class of
traffic on the basis of user-defined criteria. Traffic policing methods measure traffic
flows against user-defined criteria and identify it as either conforming, exceeding
or violating the criteria.
The Device supports three incoming traffic metering algorithms: Token Bucket
Filter (TBF), Single Rate Two Color Maker (srTCM), and Two Rate Two Color Marker
(trTCM). You can specify actions which are performed on the colored packets. See
Section 16.8 on page 206
for more information on each metering algorithm.
16.3
The Quality of Service General Screen
Click
Advanced Setup
>
Quality of Service
to open the screen as shown next.
Use this screen to enable or disable QoS, set the bandwidth, and select to have
the Device automatically assign priority to upstream traffic according to the IEEE
Traffic
Time
Traffic Rate
Traffic
Time
Traffic Rate
(Before Traffic Shaping)
(After Traffic Shaping)
Traffic
Time
Traffic Rate
Traffic
Time
Traffic Rate
(Before Traffic Policing)
(After Traffic Policing)