GS1500-24P User’s Guide
79
CHAPTER 10
QoS
This chapter introduces the quality of service (QoS) parameters you can configure
on the Switch.
10.1 Overview
Quality of Service (QoS) refers to both a network's ability to deliver data with
minimum delay, and the networking methods used to control the use of
bandwidth. Without QoS, all traffic data is equally likely to be dropped when the
network is congested. This can cause a reduction in network performance and
make the network inadequate for time-critical application such as video-on-
demand.
It can be used to prioritize source-to-destination traffic flows. All packets in the
flow are given the same priority.
You can configure the Switch to prioritize traffic even if the incoming packets are
not marked with IEEE 802.1p priority tags or change the existing priority tags
based on the criteria you select.
It also uses queuing algorithms to allow switches to maintain separate queues for
packets from each individual source or flow and prevent a source from
monopolizing the bandwidth.
10.2 What You Can Do
Use the Port-based Priority screen (Section 10.4 on page 81) to assign a IEEE
802.1p priority to packets based on the ingress (incoming) port of the packet.
Use the DSCP-based Priority screen (Section 10.5 on page 82) to assign priority
to packets based on their Differentiated Services Code Points (DSCPs).
Use the Policy-based Priority screens (Section 10.6 on page 83) to classify and
prioritize certain traffic flows.
To Next Page
Loading...
