|
Many devices use SNMP to report their health and operations. They often use SNMP traps to notify failures but the best case is when they embed a true SNMP agent and a documented MIB which specifies the meaning of each SNMP OID. Polling SNMP agents is a good method to ensure that your device is operating properly.
The SNMP Monitor is designed to poll the SNMP agent and retrieve the values of a given OID (object identifier), or the values of an SNMP table, thereby enabling you to be notified when a problem occurs or just be informed of the status of the monitored device/attribute.
 SNMP polling supports SNMP v1, v2c, and v3.
To monitor an SNMP agent
| 1. | Access the Monitoring Studio Configuration panel, as explained in the Configure Monitors chapter. |
| 2. | In the Monitors section, click the SNMP button. The SNMP panel is displayed. |
| 3. | Define the SNMP Information: |
| ▪ | Select the version of the SNMP protocol used by the device to be monitored. Possible values are 1, 2c, or 3. |
| ▪ | Use the spin button to indicate the SNMP port number you wish to use to perform SNMP queries. By default the SNMP queries are performed through port 161. |
Using the SNMP Protocol - SNMP Information
| 4. | If you selected SNMP Version 1, indicate the SNMP Community string to use to perform SNMP v1 queries: |
Using the SNMP Protocol - SNMP v1 Connection Settings
The timeout used in SNMP v1 is the one configured through the PATROL Agent Configuration variable /snmp/default_timeout.
| 5. | If you selected SNMP Version 2c, indicate: |
| ▪ | the SNMP Community string to use to perform SNMP v2c queries. |
| ▪ | the number of seconds Monitoring Studio will wait for the completion of the SNMP polling (default: 120 seconds). This timeout must be long enough to complete the polling of an entire SNMP table. |
Using the SNMP Protocol - SNMP v2c Connection Settings
| 6. | If you selected SNMP Version 3, indicate: |
| ▪ | the Username to be used to perform the SNMP v3 queries. |
| ▪ | the Authentication Protocol to be used to authenticate the SNMP v3 messages. Possible values are: None, MD5, SHA. |
| ▪ | the Authentication password to be used to authenticate the SNMP v3 messages. |
| ▪ | the Privacy protocol to be used to encrypt SNMP v3 messages. Possible values are: None, AES, DES. |
| ▪ | the Privacy password associated with the privacy protocol. |
| ▪ | the Context name accessible to the SNMP entity. |
| ▪ | the number of seconds Monitoring Studio will wait for the completion of the SNMP polling (default: 120 seconds). This timeout must be long enough to complete the polling of an entire SNMP table. |
Using the SNMP Protocol - SNMP v3 Connection Settings
Polling SNMP Agents — Configuration Panel
 SNMP trap listening only supports SNMP version 1. SNMP v2c and v3 traps are not supported.
| 8. | Click Close to validate. |
|
