NS3503-16P-4C User Manual
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Improve performance for specific types of traffic and preserve performance as the amount of traffic
grows.
Reduce the need to constantly add bandwidth to the network.
Manage network congestion.
To implement QoS on your network, you need to carry out the following actions:
1. Define a service level to determine the priority that will be applied to traffic.
2. Apply a classifier to determine how the incoming traffic will be classified and thus treated by the
Switch.
3. Create a QoS profile which associates a service level and a classifier.
4. Apply a QoS profile to a port(s).
The QoS page of the Managed Switch contains three types of QoS mode - the
802.1p
mode,
DSCP
mode or
Port-base
mode can be selected. Both the three mode rely on predefined fields within the
packet to determine the output queue.
802.1p Tag Priority Mode
–The output queue assignment is determined by the IEEE 802.1p VLAN
priority tag.
IP DSCP Mode
- The output queue assignment is determined by the TOS or DSCP field in the IP
packets.
Port-Base Priority Mode
– Any packet received from the specify high priority port will treated as a
high priority packet.
The Managed Switch supports
eight priority level
queue, the queue service rate is based on
the
WRR(Weight Round Robin)
and
WFQ (Weighted Fair Queuing)
alorithm. The WRR ratio of
high-priority and low-priority can be set to
4:1
and
8:1
.
4.8.2 General
4.8.2.1 QoS Properties
The QoS Global Setting and Information screen in Figure 4-8-1 and Figure 4-8-2 appear.
Figure 4-8-1 QoS Global Setting Page Screenshot
The page includes the following fields: