Intel 480T, User Manual

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C H A P T E R 8 Quality of Service (QoS)
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The real-time display scrolls through the given portlist to provide
statistics. Screens for packet count and packets per second may be
chosen. The particular port being monitored at that time is indicated
by an asterisk (*) appearing after the port number in the display.
The command for real-time viewing is as follows:
show ports {<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 5 seconds before the packets per second
(pps) value is displayed on the screen.
Monitoring QoS in the background places transmit counter and any
“overflow” information into the switch log. The log notification
appears if one of the queues experiences an overflow condition
since the last time it was sampled. An overflow entry indicates that
a queue was over-subscribed at least temporarily, and is useful for
determining correct QoS settings and potential over-subscription
issues.
Table 39 describes the QoS monitor commands.
Table 39: QoS Monitor Commands
Command Description
disable qosmonitor Disables the QoS monitoring capability.
enable qosmonitor {port <port>} Enables the QoS monitoring capability on
the switch. When no port is specified, the
QoS monitor automatically samples all
the ports. Error messages are logged to
the syslog if the traffic exceeds the
parameters of the QoS profile(s). The
default setting is disabled.
show ports {<portlist>} qosmonitor Displays real-time QoS statistics for one
or more ports.