Juniper Networks J-Series manual Checks the following key indicators

Chapter 3: Configuring SNMP for Network Management

Table 30: SNMP Quick Configuration Summary (continued)

Field	Function
Enable Health Monitoring	Enables the SNMP health monitor on the
	router. The health monitor periodically
	(the time you specify in the interval field)
	checks the following key indicators of
	router health:
	■	Percentage of file storage used
	■	Percentage of Routing Engine CPU
		used
	■	Percentage of Routing Engine
		memory used
	■	Percentage of memory used for
		each system process
	■	Percentage of CPU used by the
		forwarding process
	■	Percentage of memory used for
		temporary storage by the
		forwarding process

Your Action

Select the check box to enable the health monitor and configure options. If you do not select the check box, the health monitor is disabled.

NOTE: If you select only the Enable Health Monitoring check box and do not specify the options, then SNMP health monitoring is enabled with the default values for the options.

Interval	Determines the sampling frequency, in
	seconds, over which the key health
	indicators are sampled and compared
	with the rising and falling thresholds.
	For example, if you configure the
	interval as 100 seconds, the values are
	checked every 100 seconds.

Enter an interval time, in seconds, between 1 and 2147483647.

The default value is 300 seconds (5 minutes).

Rising Threshold	Value at which you want SNMP to
	generate an event (trap and system log
	message) when the value of a sampled
	indicator is increasing.
	For example, if the rising threshold is 90
	(the default), SNMP generates an event
	when the value of any key indicator
	reaches or exceeds 90 percent.
Falling Threshold	Value at which you want SNMP to
	generate an event (trap and system log
	message) when the value of a sampled
	indicator is decreasing.
	For example, if the falling threshold is
	80 (the default), SNMP generates an
	event when the value of any key
	indicator falls back to 80 percent or less.

Enter a value between 0 and 100.

The default value is 90.

Enter a value between 0 and 100.

The default value is 80.

NOTE: The falling threshold value must be less than the rising threshold value.

Configuring SNMP with Quick Configuration ■ 53