HP 5820X Switch User Manual

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Figure 41 Rising and falling alarm events
Private alarm group
The private alarm group calculates the values of alarm variables and compares the result with the defined
threshold, realizing a more comprehensive alarming function.
The system handles the prialarm alarm table entry—as defined by the user—in the following ways:
• Periodically samples the prialarm alarm variables defined in the prialarm formula.
• Calculates the sampled values based on the prialarm formula.
• Compares the result with the defined threshold and generates an appropriate event if the threshold
value is reached.
NOTE:
If the count result of the private alarm group overpasses the same threshold multiple times, only the first
one can cause an alarm event, which means the rising alarm and falling alarm are alternate.
Configuring the RMON statistics function
RMON statistics function can be implemented by either the Ethernet statistics group or the history group,
but the objects of the statistics are different, you can configure a statistics group or a history group.
• A statistics object of the Ethernet statistics group is a variable defined in the Ethernet statistics table,
and the recorded content is a cumulative sum of the variable from the time the statistics entry is
created to the current time. For more information, see

HP 5820X Switch Specifications

General

Form Factor	Rack-mountable
Power over Ethernet (PoE)	No
Flash Memory	512 MB
Redundant Power Supply	Optional
VLAN Support	Yes
Quality of Service (QoS)	Yes
IPv6 Support	Yes
Layer	3
Routing Protocol	BGP, IS-IS, OSPF, RIP, VRRP, PIM
Remote Management Protocol	SNMP 1, RMON, Telnet, SNMP 3, SNMP 2c, CLI, SSH
Features	Quality of Service (QoS), VLAN support, Access Control List (ACL), IPv6 support
Compliant Standards	IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.3, IEEE 802.3ab, IEEE 802.3z
Port Type	10/100/1000Base-T
Power Source	AC power supply
Security Features	Access Control List (ACL)
Layer Supported	L2/L3