User guide

9-22 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
Q
UALITY OF
S
ERVICE
(Q
O
S)
R
EAL
-T
IME
P
ERFORMANCE
M
ONITORING
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 command:
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 five seconds before the packets per second (pps) value is
displayed on the screen.
B
ACKGROUND
P
ERFORMANCE
M
ONITORING
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 9-12: 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.