Chapter 10 Quality of Service (QoS)
EX5501-B0 / AX7501-B0 / PX7501-B0 User’s Guide
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10.8 Technical Reference
The following section contains additional technical information about the Zyxel Device features
described in this chapter.
Committed
Burst Size
Specify the committed burst size for packet bursts. This must be equal to or less than the peak
burst size (two rate three color) or excess burst size (single rate three color) if it is also configured.
This is the maximum size of the (first) token bucket in a traffic metering algorithm.
Excess Burst Size
Specify the additional amount of bytes that are admitted at the committed rate besides the
committed burst size.
This is the maximum size of the second token bucket in the srTCM.
This field is only available when you select
Single Rate Three Color
in the
Meter Type
field.
Peak Rate
Specify the maximum rate at which packets are admitted to the network.
The peak rate should be greater than or equal to the committed rate. This is to specify how
many bytes of tokens are added to the second bucket every second in the trTCM.
This field is only available when you select
Two Rate Three Color
in the
Meter Type
field.
Peak Burst Size
Specify the maximum amount of bytes that are admitted at the committed rate.
This is the maximum size of the second token bucket in the trTCM.
This field is only available when you select
Two Rate Three Color
in the
Meter Type
field.
Conforming
Action
Specify what the Zyxel Device does for packets within the committed rate and burst size (green-
marked packets).
•
Pass:
Send the packets without modification.
•
DSCP Mark:
Change the DSCP mark value of the packets. Enter the DSCP mark value to use.
Partial
Conforming
Action
Specify the action that the Zyxel Device takes on yellow-marked packets.
Select
Pass
to forward the packets.
Select
Drop
to discard the packets.
Select
DSCP Mark
to assign a specified DSCP number (between 0 and 63) to the packets and
forward them. The packets are dropped if there is congestion on the network.
This field is only available when you select
Single
/
Two Rate Three Color
in the
Meter Type
field.
Non-
Conforming
Action
Specify what the Zyxel Device does for packets that exceed the excess burst size or peak rate
and burst size (red-marked packets).
•
Drop:
Discard the packets.
•
DSCP Mark:
Change the DSCP mark value of the packets. Enter the DSCP mark value to use.
The packets may be dropped if there is congestion on the network.
Available Class
Selected Class
Select a QoS classifier to apply this QoS policer to traffic that matches the QoS classifier.
Highlight a QoS classifier in the
Available Class
box and use the
>
button to move it to the
Selected Class
box.
To remove a QoS classifier from the
Selected Class
box, select it and use the
<
button.
Cancel
Click
Cancel
to exit this screen without saving any changes.
OK
Click
OK
to save your changes.
Table 55 Policer Setup: Add/Edit
LABEL
DESCRIPTION
