ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
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QoS Commands
This chapter describes commands for:
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Configuring Quality of Service (QoS) profiles
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Creating traffic groupings and assigning the groups to QoS profiles
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Configuring, enabling and disabling explicit class-of-service traffic groupings (802.1p and DiffServ)
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Configuring traffic grouping priorities
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Metering using ACLs—BlackDiamond 8800 series of switch and Summit X450 family of switches
only
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Verifying configuration and performance
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Configuring and displaying bidirectional rate-shaping—BlackDiamond 10808s switch only
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Egress traffic rate limiting—BlackDiamond 8800 series switches and Summit X450 family of switches
only
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Hierarchical QoS—BlackDiamond 12804 R-Series switch only
Qualify of Service (QoS) is a feature of ExtremeWare XOS that allows you to specify different service
levels for outbound and inbound traffic. QoS is an effective control mechanism for networks that have
heterogeneous traffic patterns. Using QoS, you can specify the service that a traffic type receives.
Policy-based QoS allows you to protect bandwidth for important categories of applications or
specifically limit the bandwidth associated with less critical traffic. The switch contains separate
hardware queues on every physical port. Each hardware queue is programmed by ExtremeWare XOS
with bandwidth management and prioritization parameters, defined as a QoS profile. The bandwidth
management and prioritization parameters that modify the forwarding behavior of the switch affect
how the switch transmits traffic for a given hardware queue on a physical port. Up to eight physical
queues per port are available.
With the 11.0 version of the software, you can also assign parameters to traffic ingressing the switch for
minimum and maximum bandwidth.
To configure QoS, you define how your switch responds to different categories of traffic by creating and
configuring QoS profiles. The service that a particular type of traffic receives is determined by assigning
a QoS profile to a traffic grouping or classification. The building blocks are defined as follows:
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QoS profile—Defines bandwidth and prioritization parameters.
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Traffic grouping—A method of classifying or grouping traffic that has one or more attributes in
common.
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QoS policy—The combination that results from assigning a QoS profile to a traffic grouping.
QoS profiles are assigned to traffic groupings to modify switch-forwarding behavior. When assigned to
a traffic grouping, the combination of the traffic grouping and the QoS profile comprise an example of a
single policy that is part of Policy-Based QoS.
Extreme Networks switch products support explicit Class of Service traffic groupings. This category of
traffic groupings describes what is sometimes referred to as
explicit packet marking,
and includes:
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IP DiffServ code points, formerly known as IP TOS bits
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Prioritization bits used in IEEE 802.1p packets
