Remote Management (RMON) Alarm Settings on SFE/SGE Managed Switches

Objective

Alarm settings play an important role in network management. Network alarms occur when there is a network problem or any event is detected. This document explains how to set up RMON alarms on SFE/SGE series devices.

Applicable Devices

• SFE/SGE Managed Switches

Software Version

• v3.0.0.18

RMON Alarms

Step 1. Log in to the web configuration utility and choose Statistics > RMON (Remote Management) > Alarms. The RMON Alarms page opens:

Step 2. Click Add. The Add RMON Alarm Page opens:

Step 3. In the Add Alarms page, click the desired option and choose the Interface from the Interface drop-down list. Interface indicates the interface for which statistics are displayed. The possible field values are: 

• Port — Defines the specific port for which Ethernet statistics are displayed. A port needs to have an event alarm.

• Link Aggregation(LAG) — Defines the specific LAG for which Ethernet statistics are displayed. The event is to be configured to the LAG ports.

Step 4. Choose the counter name from the Counter Name drop-down list. Counter name displays the selected Management Information Base (MIB) variable. MIB is a collection of information organized hierarchically and is accessed using a protocol such as SNMP. SNMP agents maintain a list of variables that are used to manage the device. The variables are defined in the Management Information Base (MIB). 

Step 5. Click the sample type radio button that corresponds to the snapshot. Sample type defines the sampling method for the selected variable and compares the value against the thresholds. The possible field values are:

• Absolute — Takes the current snapshot of the Management Information Base.

• Delta — Takes the difference between two consecutive samples.

Step 6. Enter the rising threshold to trigger a rising alarm or reset a falling alarm in the Rising Threshold field. Rising threshold displays the rising counter value that triggers the rising threshold alarm.

Step 7. (Optional) Choose the rising event from the Rising Event drop-down list. Rising event selects an event which is defined in the Events table that triggers the rising threshold alarm.

Step 8. Enter the falling threshold to trigger the switch with a falling alarm or reset a rising alarm in the Falling Threshold field. Falling threshold displays the falling counter value that triggers the falling threshold alarm.

Note: Falling threshold must be less than rising threshold.

Step 9. (Optional) Choose the falling event from the Falling Event drop-down list. Falling event chooses an event which is defined in the Events table that triggers the falling threshold alarm.

Step 10. (Optional) Choose the startup alarm type. Startup Alarm displays the trigger that activates the alarm generation. 

• Rising Alarm — Generated if the first sample after the alarm entry becomes active is greater than or equal to the rising threshold.

• Falling Alarm — Generated if the first sample after the alarm entry becomes active is less than or equal to the falling threshold.

• Rising and Falling — Generated if the first sample after the alarm entry becomes active satisfies either of the corresponding thresholds. 

Step 11. Enter an interval (in seconds) in the Interval field. This field defines the alarm interval time in seconds.

Step 12. (Optional) Enter the owner of the event in the Owner field. This field displays the device or user that defined the alarm.

Step 13. Click Apply to save the changes.

Caution: This only saves your configuration to the running configuration file. This means any changes made will be lost if the device is rebooted. If you wish to save these changes even after a system reboot, you need to copy the running configuration file to the startup configuration file. See Copy Configuration File on SFE/SGE Series Managed Switches for more information on how to do this.