Specifications

Preliminary July 7, 2005 Monitoring the QLogic SANbox Fibre Channel Switch with NetCentral 7
Monitoring Trends
Preliminary
Monitoring Trends
Click the NetCentral Trends view control button to view graphs of status parameters.
The following table specifies the parameters reported in the Trends view:
Parameter Name Comments Unit
System\Up Time Up time essentially is an ever incrementing value that indicates the system is up and
running and is measured as an absolute value in minutes; given that the polling rate is
more than a minute.
Though the value itself is of less significance, it is the ramp graph obtained by plotting
these values that proves significant where a downward edge on the ramp indicates a
device going offline and a flat line at zero indicating the device downtime.
Multiple ramps indicate how often the device was taken down for activities like
maintenance or servicing, or simply how many times it was restarted to handle a
complete device failure. If the ramps do not coincide when the device was taken down,
it could indicate conditions like automatic restarts, and the device may need attention.
Minutes
System\Processor
Usage
Processor Usage is the average percentage of elapsed time that the processor spends
executing non-idle instructions during that sampling period and is an indicator of
switch management activity.
Sustained value over 80% (5 minutes or more) indicates an excessively busy system
and may result in the system appearing unresponsive to management applications.
Upper Threshold: 80
%
System\Memory
Usage
Memory usage is the percentage of total physical memory used by the system during
that sampling period to support switch management operations.
Sustained increase in this value could indicate a memory leak in one or more running
programs, or high system loading and might eventually lead to system failure due to
unavailability of more memory.
Upper Threshold: 90
%
Ports\Throughput
[module-port]
Throughput is the rate at which data is transmitted or received at a switch port in Mega
Bits per second during that sampling period.
This is an indicator of the port usage
Mega Bits
Per Second
(Mbps)
Ports\Link
Failures
[module-port]
Link failures indicate the number of times the Fibre Channel connectivity with the port
was “broken” during that sampling interval when the port observes errors for a
sustained time interval and was online.
This is likely an indicator for a faulty connector or cable. These are also caused when
the device connected to the port is restarted, replaced or being serviced when the Fibre
Channel cable connected to the port is temporarily disconnected.
The error recovery for this type of error is disruptive and will be noticed by the device
connected to the port. Each such error will cause the system to run degraded until the
link recovery is complete.
Errors