Qos; Advantages Of Qos - D-Link DES-3528 User Manual

xStack DES-3528 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual

QoS

HOL Blocking Prevention
Bandwidth Control
Traffic Control
802.1p Default Priority
802.1p User Priority
QoS Scheduling Mechanism
SRED
The DES-3528 Series supports 802.1p priority queuing Quality of Service. The following section discusses the
implementation of QoS (Quality of Service) and benefits of using 802.1p priority queuing.

Advantages of QoS

QoS is an implementation of the IEEE 802.1p standard that allows network administrators a method of reserving
bandwidth for important functions that require a large bandwidth or have a high priority, such as VoIP (voice-over
Internet Protocol), web browsing applications, file server applications or video conferencing. Not only can a larger
bandwidth be created, but other less critical traffic can be limited, so excessive bandwidth can be saved. The Switch
has separate hardware queues on every physical port to which packets from various applications can be mapped to,
and, in turn prioritized. View the following map to see how the DES-3528 implements 802.1P priority queuing.
Figure 8- 1. Mapping QoS on the Switch
114
Section 8