ZyXEL Communications EX3510-B1, User Manual

Page: 148 / 313

Chapter 10 Quality of Service (QoS)
EX3510-B1 User’s Guide
148
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 Zyxel 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 10.8 on page 161 for more information on each
metering algorithm.
10.3 Quality of Service General Settings
Click Network Setting > QoS > General to open the screen as shown next.
Use this screen to enable or disable QoS and set the upstream bandwidth or assign traffic priority. See
Section 10.1 on page 146 for more information.
When one of the following situations happens, the current WAN linkup rate will be used instead:
1
WAN Managed Upstream Bandwidth is set to 0
2
WAN Managed Upstream Bandwidth is empty
3
WAN Managed Upstream Bandwidth is higher than the current WAN interface linkup rate
Note: Manually defined QoS is ignored when Upstream Traffic Priority is selected.
Note: Upstream Traffic Priority automatically assigns a traffic priority level based on the
selected criteria.
Note: To have your QoS settings configured in other QoS screens take effect, select None in
the Upstream Traffic Priority Assigned by field.
Traffic
Time
Traffic Rate
Traffi
c
Time
Traffic Rate
(Before Traffic Policing) (After Traffic Policing)