Extreme Networks ExtremeWare XOS 11.3, Manual

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Quality of Service
ExtremeWare XOS 11.3 Concepts Guide
292
Configuring QoS
NOTE
With software version 11.0, you can create access control lists (ACLs) with QoS actions. The QoS forwarding
information you configured in an ACL takes precedence over QoS configuration using the CLI commands. Refer to
Chapter 13 for more information on ACLs.
To configure QoS, you define how your switch responds to different categories of traffic by creating and
configuring QoS profiles. You then group traffic into categories (according to the needs of the
application, as previously discussed) and assign each category to a QoS profile. Configuring QoS is a
three-step process:
1 Configure the QoS profile.
QoS profile—A class of service that is defined through minimum and maximum bandwidth
parameters and prioritization settings on the BlackDiamond 10K switch or through configuration of
buffering and scheduling settings on the BlackDiamond 8800 family of switches and the Summit
X450 switch. The level of service that a particular type of traffic or traffic grouping receives is
determined by assigning it to a QoS profile. The names of the QoS profiles are QP1 through QP8;
these names are not configurable.
2 Create traffic groupings.
Traffic grouping—A classification or traffic type that has one or more attributes in common. These
can range from a physical port to IP Layer 4 port information. You assign traffic groupings to QoS
profiles to modify switch forwarding behavior. Traffic groupings transmitting out the same port that
are assigned to a particular QoS profile share the assigned characteristics and hence share the class of
service.
3 Monitor the performance of the application with the QoS monitor to determine whether the policies
are meeting the desired results.
Configuring QoS on the BlackDiamond 8800 Family of Switches
and the Summit X450 Switch Only
The BlackDiamond 8800 family of switches and the Summit X450 switch allow dynamic creation and
deletion of QoS queues, with Q1 and Q8 always available, rather than the 8 fixed queues on the
BlackDiamond 10K switch.
NOTE
The sFlow application uses QP2 to sample traffic on the BlackDiamond 8800 family of switches and the Summit
X450 switch. Any traffic grouping using QP2 may encounter unexpected results when sFlow is enabled.
The following considerations apply only to QoS on the BlackDiamond 8800 family of switches and the
Summit X450 switch:
●
The BlackDiamond 8800 family of switches and the Summit X450 switch do not support QoS
monitor.
●
The following QoS features share resources on the BlackDiamond 8800 family of switches and the
Summit X450 switch:
■
ACLs