3Com Switch 4500 Family Manual page 667

Parameters
entry-number: Index of the alarm entry to be added/removed, in the range 1 to 65535.
alarm-variable: Alarm variable, a string comprising 1 to 256 characters in dotted node OID format (such
as 1.3.6.1.2.1.2.1.10.1). Only the variables that can be resolved to ASN.1 INTEGER data type (that is,
INTEGER, Counter, Gauge, or TimeTicks) can be used as alarm variables.
sampling-time: Sampling interval (in seconds), in the range 5 to 65,535.
delta: Specifies to sample increments (that is, the current increment with regard to the latest sample)
absolute: Specifies to sample absolute values.
rising_threshold threshold-value1: Specifies the rising threshold. The threshold-value1 argument
ranges from 0 to 2,147,483,647.
event-entry1: Index of the event entry corresponding to the rising threshold, in the range of 0 to 65535.
falling_threshold threshold-value2: Specifies the falling threshold. The threshold-value2 argument
ranges from 0 to 2,147,483,647.
event-entry2: Index of the event entry corresponding to the falling threshold, in the range 0 to 65535.
owner text: Specifies the owner of the entry, a string of 1 to 127 characters.
Description
Use the rmon alarm command to add an alarm entry to the alarm table. If you do not specify the owner
text keyword/argument combination, the owner of the entry is displayed as "null".
Use the undo rmon alarm command to remove an alarm entry from the alarm table.
You can use the rmon alarm command to define an alarm entry so that a specific alarm event can be
triggered under specific circumstances. The act (such as logging and sending traps to NMS) taken after
an alarm event occurs is determined by the corresponding alarm entry.
Before adding an alarm entry, make sure the events to be referenced in the alarm entry exist. Refer to
the rmon event command for related information.
With an alarm entry defined in an alarm group, a network device performs the following operations
accordingly:
Sample the defined alarm variables (alarm-variable) once in each specified period, which is
specified by the sampling-time argument.
Comparing the sampled value with the set thresholds and performing the corresponding operations,
as described in
Table 2-7 Sample value and the corresponding operation
The sample value is larger than or equal to the
set upper threshold (threshold-value1)
Table 2-7.
Comparison
Triggering the event identified by the
event-entry1 argument
2-9
Operation