HP StorageWorks Fabric OS 5.x Fabric Watch Administrator Guide (AA-RVJ0B-TE, September 2005)

Fabric OS 5.x Fabric Watch administrator guide 25
Port persistence
In the case of port monitoring, there is an additional factor to consider. The data collected in port
monitoring can vary a lot over short time periods. Therefore, the port can become a source of frequent
event messages (the data can exceed the threshold range and return to a value within the threshold range).
Fabric Watch uses port persistence for a port event that requires the transition of the port into a marginal
status. Fabric Watch does not record any event until the event persists for a length of time equal to the port
persistence time. If the port returns to normal boundaries before the port persistence time elapses, Fabric
Watch does not record any event.
The port persistence time is measured in seconds, and can be configured. Configuring the port persistence
time to zero disables this feature.
Notification methods
There are five notification methods available through Fabric Watch, but not all notification methods can be
applied to all of the classes. Valid notification methods are represented through the valid alarm matrix.
Fabric Watch provides the following notification methods:
• ”Switch event (error) log entry” on page 25
• ”SNMP trap” on page 25
• ”RAPITrap” on page 26
• ”Port log lock” on page 26
• ”Email alert” on page 26
To enable event settings, you must set the associated attribute to a nonzero value between one and thirty
one. The exact value you specify determines which event notification method Fabric Watch uses if the event
setting criteria is met.
For details about valid notification methods in the alarm matrix, see ”Assigning notification methods” on
page 26.
Switch event (error) log entry
The switch event (error) log holds up to 1024 entries. This error log stores event information but does not
actively send alerts. Use the ErrShow command to view the log.
Log entries can also trigger SNMP traps if the SNMP agent is configured. When the SNMP agent is
configured to a specific error message level, then error messages at that level triggers SNMP traps. For
information on configuring the SNMP agent using the agtCfgSet command, see the
HP StorageWorks
Fabric OS 5.x command reference guide
.
SNMP trap
The Simple Network Management Protocol (SNMP) performs an operation called a trap that notifies a
management station (a workstation that runs network management applications using SNMP protocol)
when events occur.
You must configure the software to receive trap information from the network device. You must also
configure the SNMP agent on the switch to send the trap to the management station using the agtCfgSet
command. For more information on this command, refer to the
HP StorageWorks Fabric OS 5.x command
reference guide.
An SNMP trap forwards the following information to an SNMP management station:
• Name of the element whose counter registered an event
• Class, area, and index number of the threshold that the counter crossed
• Event type
• Value of the counter that exceeded the threshold
• State of the element that triggered the alarm
• Source of the trap