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Manual Chapter: SNMP Trap Configuration
Manual Chapter
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Overview: SNMP trap configuration

On the BIG-IP system, traps are definitions of unsolicited notification messages that the BIG-IP alert system and the SNMP agent send to the SNMP manager when certain events occur on the BIG-IP system. Configuring SNMP traps on a BIG-IP system means configuring the way that the BIG-IP system handles traps, as well as setting the destination for notifications that the alert system and the SNMP agent send to an SNMP manager.

The BIG-IP system stores traps in two specific files:

/etc/alertd/alert.conf
Contains default SNMP traps.
Important: Do not add or remove traps from the /etc/alertd/alert.conf file.
/config/user_alert.conf
Contains user-defined SNMP traps.

You use the Configuration utility to enable traps and set trap destinations. When you configure traps, the BIG-IP system automatically updates the alert.conf and user_alert.conf files.

Task summary

You can enable traps for certain events and set trap destinations.

Task list

Enabling traps for specific events

You can configure the SNMP agent on the BIG-IP system to send, or refrain from sending, notifications when the following events occur:

  • The SNMP agent on the BIG-IP system stops or starts. By default, this trap is enabled.
  • The BIG-IP system receives an authentication warning, generated when a client system attempts to access the SNMP agent. By default, this trap is disabled.
  • The BIG-IP system receives any type of warning. By default, this trap is enabled.
  1. On the Main tab, click System > SNMP.
  2. From the Traps menu, choose Configuration.
  3. To send traps when someone starts or stops the SNMP agent, verify that the Agent Start/Stop check box is selected.
  4. To send notifications when authentication warnings occur, select the Agent Authentication check box.
  5. To send notifications when certain warnings occur, verify that the Device check box is selected.
  6. Click Update.

Setting v1 and v2c trap destination

You must specify the destination SNMP manager to which the BIG-IP system should send notifications. For SNMP v1 and v2c only, you specify a destination system by providing the community name to which the BIG-IP system belongs, the IP address of the SNMP manager, and the target port number of the SNMP manager.

Important: This procedure applies to SNMP v1 and v2c only.
  1. On the Main tab, click System > SNMP.
  2. From the Traps menu, select Destination.
  3. In the upper-right corner of the screen, click Create.
  4. For the Version setting, select an SNMP version number.
  5. In the Community field, type the community name for the SNMP agent running on the BIG-IP system.
  6. In the Destination field, type the IP address of the SNMP management system.
  7. In the Port field, type the SNMP management system port number that is to receive the traps.
  8. Click Finished.

Setting v3 trap destination

You must specify the destination SNMP manager to which the BIG-IP system should send notifications. For SNMP v3 only, you specify a destination system by providing the IP address and target port number of the SNMP manager, as well as authentication and security information for accessing the SNMP manager.

Important: This procedure applies to SNMP v3 only.
  1. On the Main tab, click System > SNMP > Traps > Destination.
  2. In the upper-right corner of the screen, click Create.
  3. For the Version setting, select v3.
  4. In the Destination field, type the IP address of the SNMP management system.
  5. In the Port field, type the SNMP management system port number that is assigned to receive the traps.
  6. From the Security Level list, select the level of security at which you want SNMP messages processed.
    Option Description
    Option Description
    Auth, No Privacy Process SNMP messages using authentication but without encryption. When you use this value, you must also provide values for the Security Name, Authentication Protocol, and Authentication Password settings.
    Auth and Privacy Process SNMP messages using authentication and encryption. When you use this value, you must also provide values for the Security Name, Authentication Protocol, Authentication Password, Privacy Protocol, and Privacy Password settings.
  7. In the Security Name field, type the user name the system uses to handle SNMP v3 traps.
  8. From the Authentication Protocol list, select the algorithm the system uses to authenticate SNMP v3 traps. Your options are MD5 or SHA. When you set this value, you must also enter a value in the Authentication Password field.
  9. In the Authentication Password field, type the password the system uses to handle an SNMP v3 trap. When you set this value, you must also select a value from the Authentication Protocol list.
    Note: The authentication password must be at least 8 characters long.
  10. If you selected Auth and Privacy from the Security Level list, from the Privacy Protocol list, select the algorithm the system uses to encrypt SNMP v3 traps. Your options are AES or DES. When you set this value, you must also enter a value in the Privacy Password field.
  11. If you selected Auth and Privacy from the Security Level list, in the Privacy Password field, type the password the system uses to handle an encrypted SNMP v3 trap. When you set this value, you must also select a value from the Privacy Protocol list.
    Note: The authentication password must be at least 8 characters long.
  12. Click Finished.
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