Extreme Networks ExtremeWare 7.2e, Installation And User Manual

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120 ExtremeWare 7.2e Installation and User Guide
Quality of Service (QoS)
VLAN
A VLAN traffic grouping indicates that all intra-VLAN switched traffic and all routed traffic sourced
from the named VLAN uses the indicated QoS profile. To configure a VLAN traffic grouping, use the
following command:
configure vlan <vlan name> qosprofile <qosprofile>
For example, all devices on VLAN servnet require use of the QoS profile qp4. The command to configure
this example is as follows:
configure vlan servnet qosprofile qp4
Verifying Physical and Logical Groupings
To verify settings on ports or VLANs, use the following command:
show qosprofile
The same information is also available for ports or VLANs using one of the following command:
show vlan
Verifying Configuration and Performance
Once you have created QoS policies that manage the traffic through the switch, you can use the QoS
monitor to determine whether the application performance meets your expectations.
QoS Monitor
The QoS monitor is a utility that monitors the eight hardware queues (QP1-QP8) associated with any
port(s). The QoS monitor keeps track of the number of frames and the frames per second that a specific
ingress queue is responsible for transmitting on a physical port. Two options are available: a real-time
display, and a separate option for retrieving information in the background and writing it to the log.
Real-Time Performance Monitoring
The real-time display scrolls through the given portlist to provide statistics. You can choose screens for
packet count and packets per second. The specific port being monitored is indicated by an asterisk (*)
appearing after the port number in the display.
The view real-time switch per-port performance, use the following command:
show ports {mgmt | <portlist>} qosmonitor
QoS monitor sampling is configured as follows:
• The port is monitored for 20 seconds before the switch moves on to the next port in the list.
• A port is sampled for five seconds before the packets per second (pps) value is displayed on the
screen.
QoS Monitor Behavior
The QoS monitor on the Summit 400-48t behaves slightly different than other Extreme switches. The
QoS monitor captures the statistics at the ingress port but displays the statistics unchanged at the egress