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Chapter 4: Quality of Service Configuration
ProSafe Unmanaged Plus Switch Configuration Utility User Guide
QoS Overview
There are many different classes of data that can be sent across a network. Depending on
the volume of traffic on the network and the capacity of the equipment in the network, data
can be delayed, or lost and retransmitted before reaching its destination. Normally this is not
a problem since the data is reassembled at the destination.
If the data consists of text or numeric data to be stored on the destination computer, the user
would not notice the delay. But if the data was voice, streaming video, or other delay sensitive
data, delays would be undesirable. Video sequences would be jerky and voice
communication would have annoying gaps.
The QoS (Quality of Service) feature in the ProSafe
®
Plus switches allows you to control the
flow of data passing through the switch.
•
QoS
global configuration assigns priorities to data.
•
Rate Limit
sets limits on transmission rates for data passing through the switch.
•
Broadcast Filtering
blocks mass transmissions of broadcast packets from being
forwarded to all ports.
All of the QoS features have default settings. It is not necessary to configure any settings in
order to use the ProSafe
®
Plus switches.
The following table lists the default settings.
Feature
Setting
Global Configuration
QoS Mode Port based
Port Priority Low priority for each port
Rate Limit
Ingress No limit
Egress No limit
Broadcast Filtering
Disabled
