File Server Applications; Configuring Qos For A Port Or Vlan; Traffic Groupings - Extreme Networks 200 Series Installation And User Manual

An exception to this may be created by some Java
applications are generally tolerant of latency, jitter, and some packet loss, however small packet-loss
may have a large impact on perceived performance due to the nature of TCP. The relevant parameter
for protecting browser applications is minimum bandwidth. The relevant parameter for preventing
non-critical browser applications from overwhelming the network is maximum bandwidth. In addition,
RED can be used to reduce session loss if the queue that floods Web traffic becomes over-subscribed.

File Server Applications

With some dependencies on the network operating system, file serving typically poses the greatest
demand on bandwidth, although file server applications are very tolerant of latency, jitter, and some
packet loss, depending on the network operating system and the use of TCP or UDP.
NOTE
Full-duplex links should be used when deploying policy-based QoS. Half-duplex operation on links can
make delivery of guaranteed minimum bandwidth impossible.
Table 38 summarizes QoS guidelines for the different types of network traffic.
Table 38: Traffic Type and QoS Guidelines
Traffic Type
Voice
Video
Database
Web browsing
File server

Configuring QoS for a Port or VLAN

Table 39 lists the commands used to configure QoS.
Table 39: QoS Configuration Commands
Command
config ports <portlist> qosprofile <qosprofile>
config vlan <name> qosprofile <qosprofile>

Traffic Groupings

Once a QoS profile is modified for bandwidth and priority, you assign traffic a grouping to the profile.
A traffic grouping is a classification of traffic that has one or more attributes in common. Traffic is
typically grouped based on the applications discussed starting on page 158.
Summit 200 Series Switch Installation and User Guide
™
-based applications. In addition, Web-based
Key QoS Parameters
Minimum bandwidth, priority
Minimum bandwidth, priority, buffering (varies)
Minimum bandwidth
Minimum bandwidth for critical applications, maximum
bandwidth for non-critical applications, RED
Minimum bandwidth
Description
Configures one or more ports to use a
particular QoS profile.
Allows you to configure a VLAN to use a
particular QoS profile.

Configuring QoS for a Port or VLAN

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