Setting up alarms

Alarm and SNMP configuration is done under Account > Alarms. Specifically, the items configured are:

  • SNMP managers
  • Email lists
  • Alarm templates
  • Automatic alarm suppressions

SNMP Manager settings

Netrounds can send SNMP traps to an SNMP manager whenever the SLA is violated during a monitoring. Netrounds supports SNMP version 2c as well as the more secure SNMP version 3. 

Note: The SNMP traps, regardless of SNMP version, are sent from the Netrounds cloud server (app.netrounds.com), using the standard SNMP port (UDP port 162). No traps are sent directly from Test Agents.

The SNMP MIB will be sent to you on request. Send an email to support@netrounds.com to obtain the MIB.

When setting up a monitoring, you select which SNMP manager should receive alarm traps.

Here is how to set up a new SNMP manager:

  • Click the button Add Manager.
  • In the dialog that appears, choose SNMP version: v2c or v3.

Further parameters for version v2c are as follows:

  • IP address: The IP address of your SNMP manager (trap sink).
  • Community: The community string used for authentication.

For version v3, a couple more parameters need specifying:

 

  • IP address: The IP address of your SNMP manager (trap sink).
  • Engine ID: The engine id to use. This identity should be the same in Netrounds and in your SNMP manager.
  • User name: The user name to supply for authentication.
  • Security: The security level to use when sending traps. SNMPv3 defines three levels of security:
    • No authentication, no privacy
    • Authentication, no privacy
    • Authentication, privacy

If you choose the security level Authentication, no privacy, you need to provide a password for authentication. The password must be at least 8 characters in length. The authentication protocol is MD5.

If you choose the security level Authentication, privacy, you need to provide a password for privacy (= encryption of the SNMP trap). The password must be at least 8 characters in length. The privacy protocol is DES.

The picture below shows an example of SNMP manager settings for the two SNMP versions supported.

Email settings

As an alternative to SNMP traps, you can send alarms by email. You set up an email list in the Alarm settings and point to that list when setting up a monitoring. An email will then be sent to all email addresses on the list whenever one of the following happens:

  • an alarm is raised (some SLA threshold violated), or
  • the severity level of the alarm changes, or
  • the alarm is cleared (ES level back below SLA threshold).

To set up an email list:

  • Click the button Add Email List.

  • Name: Enter a name for the email list. 
  • Emails: Enter email addresses, separated by commas.

Alarm templates

Alarm templates are used to predefine alarm conditions. To set up such a template:

  • Click the button Add Template and configure the parameters as described below.

  • SNMP manager: SNMP manager to send alarms to.
  • Email list: Email list to send alarms to. 

    Note: You can choose either an SNMP manager, or an email list, or both. 

  • Window size (s): The size of the sliding window used when calculating the ES level to be compared to the SLA thresholds.
  • Send interval (s): The interval between resending of alarms if no change has occurred in severity. Leave this blank if you want to send the alarm only once. The default is 3600 seconds = 1 hour.

The thresholds are used to evaluate whether or not an alarm should be sent, and if so which severity the alarm should have.

For each severity level, an alarm is raised if the number of errored seconds reaches the Raise threshold within the sliding window, and the alarm is cleared if the number of errored seconds drops below the Clear threshold within the window.

  • Critical threshold (s): Raise and clear thresholds for alarms with severity "Critical". No defaults.
  • Major threshold (s): Raise and clear thresholds for alarms with severity "Major". Defaults: Raise 6 ES, Clear 0 ES.
  • Minor threshold (s): Raise and clear thresholds for alarms with severity "Minor". No defaults.
  • Warning threshold (s): Raise and clear thresholds for alarms with severity "Warning". No defaults.

Example: If Window size is set to 60, and the threshold for raising a critical alarm (Critical threshold/Raise) is 10, this means that a critical alarm will be raised if 10 or more errored seconds have occurred during the last 60 seconds.

To avoid frequent on/off toggling of alarms, you should set the Clear threshold lower than the Raise threshold for a given severity (even though it is possible to set them equal).

  • Action (optional): This is a free-text field where you can suggest an action to be performed when an alarm is raised. The Action text will be included in each sent email or SNMP trap. One way to use this field is to add a link to a test (for example, "https://app.netrounds.com/exampleaccount/testing/11111/") which the recipient of the alarm should run in order to troubleshoot the problem.
  • Template name: Enter a name for the alarm template here.

Alarm suppressions

It is possible to suppress alarms during a specified time interval. No alarms will then be sent even if thresholds are exceeded. This function is useful if a monitoring or a Test Agent is temporarily affected by maintenance or other planned work.

To set up an alarm suppression:

  • Click the button Add Suppression and configure the parameters as described below.

  • Name: Enter a name for the alarm suppression.
  • Monitoring: The monitorings the suppression should apply to.
  • Test Agent: The Test Agents the suppression should apply to.
  • Start time, End time: The time interval during which the suppression will be in effect (for example, a maintenance window). 

Finish by clicking Save. The suppression is now activated and will suppress alarms during the specified period.

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