Advantech EKI-9512-C0IDW10E, Руководство пользователя

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293 EKI-9500 Series User Manual
4.7.3 Diffserv
4.7.3.1 Global
Use the Diffserv Global Configuration and Status page to configure the administrative
mode of Differentiated Services (DiffServ) support on the device and to view the cur-
rent and maximum number of entries in each of the main DiffServ private MIB tables.
DiffServ allows traffic to be classified into streams and given certain QoS treatment in
accordance with defined per-hop behaviors.
Packets are classified and processed based on defined criteria. The classification cri-
teria is defined by a class. The processing is defined by a policy's attributes. Policy
attributes may be defined on a per-class instance basis, and it is these attributes that
are applied when a match occurs. A policy can contain multiples classes. When the
policy is active, the actions taken depend on which class matches the packet.
To access this page, click QoS > Diffserv > Global .
Figure 4.320 QoS > Diffserv > Global
The following table describes the items in the previous figure.
WRED Minimum
Threshold The minimum queue threshold below which now packets are dropped
for the associated drop precedence level. After the minimum is
reached, WRED randomly drops packets based on their priority (DSCP
or IP precedence). This setting applies to the interface if it is configured
with a WRED queue management type.
WRED Maximum
Threshold The maximum queue threshold above which all packets are dropped
for the associated drop precedence level. After the maximum is
reached, WRED drops all packets based on their priority (DSCP or IP
precedence). This setting applies to the interface if it is configured with
a WRED queue management type.
WRED Drop Proba-
bility Scale The packet drop probability for the drop precedence level. This setting
applies to the interface if it is configured with a WRED queue manage-
ment type.
Refresh Click Refresh to update the screen.
Edit Click Edit to edit the selected entries.
Restore Default Click Restore Default to restore all drop precedence settings on the
select interface to the default values.
Item Description
Item Description
Diffserv Admin
Mode The administrative mode of DiffServ on the device. While disabled, the
DiffServ configuration is retained and can be changed, but it is not
active. While enabled, Differentiated Services are active.
MIB Table
Class Table The current and maximum number of classifier entries in the table. Dif-
fServ classifiers differentiate among traffic types.
Class Rule Table The current and maximum number of class rule entries in the table.
Class rules specify the match criteria that belong to a class definition.