Extreme Networks BlackDiamond 6800, Installation And User Manual

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Asynchronous Transfer Mode (ATM) Module Installation and User Guide 3-29
Configuring QoS Functions
Configuring QoS Functions
The ExtremeWare software and the Extreme Networks switch architecture provide a
number of Quality of Service (QoS) functions, which are described in detail in the
ExtremeWare Software User Guide. This section describes how these QoS functions, such
as Differentiated Services (DiffServ) and Random Early Detection (RED) are supported
on the ATM module.
This section assumes some familiarity with the Extreme Networks
implementation of QoS and DiffServ features as described in the ExtremeWare
Software User Guide. For more information about QoS and DiffServ features
supported by ExtremeWare, see the ExtremeWare Software User Guide.
This section contains information on the following topics:
• Summary of QoS-Related Commands on page 3-29
•
Configuring a QoS Profile on page 3-30
• Classification and Replacement Policies on page 3-31
• Configuring DiffServ on page 3-33
• Enhanced RED Support on page 3-36
Summary of QoS-Related Commands
Table 3-8 contains an alphabetical list of the QoS-related commands that support the
ATM module. Commands with keywords or parameters shown in italic typeface are
existing ExtremeWare commands that have been enhanced to support the ATM module.
Each command is described in detail in the sections that follow.
Table 3-8: QoS-Related Commands
Command Description
config diffserv dscp-mapping
<input_codepoint>/<output_codepoint>
ports <portlist> {egress {no-congestion |
congestion} | ingress} Configures a mapping between an input DiffServ
code point (DSCP) and an associated output
DSCP for the specified ATM ports.
config diffserv examination code-point
<code_point> qosprofile <qosprofile>
ports <portlist> {low-drop-probability |
high-drop-probability} Configures the mapping between a DSCP and a
specified QoS profile.
Added keywords for low-drop-probability and
high-drop-probability.