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3.4.5 QoS Priority
Network traffic is always unpredictable and the only basic assurance that can be offered is
the best effort traffic delivery. To overcome this challenge, Quality of Service (QoS) is
applied throughout the network. This ensures that network traffic is prioritized according to
specified criteria and receives preferential treatments.
QoS enables users to assign various grades of network service to different types of traffic,
such as multi-media, video, protocol-specific, time critical, and file-backup traffic. Click the
option
QoS Priority
from the
Switch Management
menu and then the following screen
page appears.
QoS Mode:
Four options are available; these are Disabled, Port-based, IEEE 802.1p,
TOS/DSCP.
Port Priority:
Assign a port priority (Q0~Q3) to each port.
802.1p Priority Map:
Assign a tag priority to the specific queue.
There are eight priority levels that you can choose to classify data packets. Choose one of
the listed options from the pull-down menu for CoS (Class of Service) priority tag values.
The default value is “0”.
The default 802.1p settings are shown in the following table:
Priority Level
Low
Low
Low
Normal
Medium
Medium
High
High
802.1p Value
0
1
2
3
4
5
6
7
TOS/DSCP Priority Map:
Select priority queue mapping for the DSCP field of every IP
packet from the pull-down menu. The DSCP includes DSCP (0) to DSCP (63), and the
priority queue includes Q0, Q1, Q2 and Q3.
Summary of Contents for HET-2106 SERIES
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