3. Technical information

3-13

Please tell me what kind of monitoring is performed by the Koban sensor's operation monitoring function (Koban sensor monitoring status).

In the case of Koban sensors, the NetSkateKoban Manager monitors them by polling the operational status of each Koban sensor at regular intervals. By default, polling occurs every 60 seconds.

When any of the following conditions are detected, a warning will be displayed (on the "Koban Sensor Monitoring Status" screen) and an email notification will be sent.

(1) When communication with the sensor is established and an anomaly is detected in the sensor process

=> Process stop

(2) When communication with the sensor cannot be established (by default, after two consecutive failed attempts)

=> Host unreachable

(3) When communication with the sensor was established but communication with the sensor monitoring function failed

=> Unable to connect

(4) If an error (such as insufficient memory) occurs on the machine on which the Koban sensor is operating

=> System error

When SwiMon sensor, a warning is issued if SNMP access is unavailable or if the required MIB information cannot be retrieved.

After that, we will not send email notifications while the warning status persists; however, once communication with the sensor is reestablished and the sensor process is confirmed to have recovered, we will update the display and send a recovery notification email.

The interval for checking the operational status of the Koban sensor and the number of failed communication attempts before a "Host Unreachable" warning is issued can be configured via the settings file. (See the "NetSkateKoban v5.3 Reference Manual: Administration" section, "13. Supplementary Information" → "13.2. Koban Manager Settings File".)

If you change the settings, please ensure that the operation check interval is set to a maximum of 180 seconds. Also, if you modify the configuration file, you must restart the NetSkateKoban Manager for the changes to take effect.

 

[config/manager/sensorMonitor.conf]

1. Immediately after installation
  INTERVAL=60
  NETWORK_ERROR_THRESHOLD=2

2. Configuration Example (Set the monitoring interval to 120 seconds and change the number of consecutive error detections
   required to trigger a "Host Unreachable" notification to 5)
  INTERVAL=120
  NETWORK_ERROR_THRESHOLD=5