Dahua PFS4218-16GT-190 Web Config Manual page 35

Step 3 Set the parameters. See Table 4-10.
Parameter
ID
Date Source
Step 4 Click Save.
History
The history group regulates that the system periodically records the different types of flow
information from the port and stores the statistics result in the history table (etherHistoryTable),
and the management can check the result conveniently. The data contains bandwidth utilization,
error package quantity, and total package quantity.
The history group records the packets that the port receives in every period, and the period
length is user-defined.
Step 1 Select Advanced > Configuration > Security > RMON > History.
The History interface is displayed. See Figure 4-38.
Step 2 Click Add New Entry, and set the ID and the data source.
Step 3 Click Save.
Alarm
RMON alarm management can monitor the specific alarm variable (for example, the packet
quantity etherStatsPkts that the port receives). After creating the alarm table, the system can
periodically acquire the value of the monitored alarm variable according to the defined time.
When the value of the alarm variable reaches the upper threshold, one upper threshold alarm
event is triggered. And when the value of the alarm variable reaches the lower threshold, one
lower threshold alarm event is triggered. The alarm management can process the alarm events
according to the event definition.
When the sampling value of alarm variable continuously exceeds the threshold in the same
direction, only the first will trigger alarm. The upper threshold alarm event and the lower
threshold alarm event are alternate. When one upper threshold alarm event triggers, the next
must be the lower threshold alarm event. As the following figure, the value of alarm variable
Figure 4-37 Add a new statistics group
Table 4-10 Statistics group parameter
Description
ID number is user-defined.
It is the mapping reference number of switch port in SNMP client.
Figure 4-38 History
Advanced Settings 28