User manual

Page 11-1
11 Health Statistics
The health statistics feature monitors the consumable resources of a switch, and provides a
single integrated source for Network Management Software (NMS), such as X-Vision, to use in
obtaining statistics on switch performance. With the health statistics, the user can set specific
threshold levels for consumable resources in the switch. Such resources include bandwidth
capacity, CAM and CPU usage, and RAM memory usage. If a threshold for a particular resource
is exceeded, a notification is sent to the NMS via an SNMP trap.
♦ Important ♦
You must configure your
NMS to accept traps from the
monitored switch. X-Vision allows you to set which
network management stations receive traps. For more
information, see the X-Vision online help.
The health statistics software monitors the resource utilization levels and thresholds of a
switch, and at fixed intervals collects the current values for each resource being monitored.
After obtaining the statistics, the health statistics software checks to see if any rising or falling
threshold crossings occurred since its last poll by comparing the current poll data with the
previous poll data. If a threshold crossing has occurred, a trap is sent to NMS (such as X-
Vision), allowing the system administrator to pinpoint possible performance issues.
Through the
UI (user interface), threshold levels can be set, the sampling interval can be
changed, and statistics (for a switch, module, or port) can be viewed or cleared.
The Health Statistics Management Menu
To access the Health menu, log on to a switch via a Telnet or console session, and type the
following command:
health
If the session is in terse mode, you will need to type ? to see the menu. If you are in verbose
mode, the following screen is displayed:
Command Health Menu
------------------ -----------------------------------------------------------------------
hdcfg Set or view parameters
hdstat View device-level statistics
hmstat View module-level statistics
hpstat View port-level statistics
hreset Reset health statistics
Main File Summary VLAN Networking
Interface Security System Services Help
/System/Health %
The hdcfg command allows you to set global thresholds for the switch. The hdstat, hmstat,
hpstat commands allow you to view the statistics on a switch, module, or port level, respec-
tively. The hreset command resets the statistics for this switch.