Editing a User Security Model Entry

From the Setup menu, select Notifications, and then SNMP V3 Traps.

Click on the Configurations tab.

From the User Security Model Entries region, click Create. The User Security Model Entries dialog displays.

Specify a Username that uniquely identifies the credential. SNMP V3 allows multiple usernames to be set in an SNMP Agent as well as SNMP Manager applications.

Select a Security Level from the drop-down menu. Available parameters become available depending on the security level. There are three levels from which to choose:

AuthPriv (Authentication + Privacy:) The sender's identity must be confirmed by the receiver (authentication). SNMP V3 messages are encrypted by the sender and must be decrypted by the receiver (privacy).

AuthNoPriv (Authentication only): The receiver must authenticate the sender's identity before accepting the message.

NoAuthNoPriv (no security): Neither sender identity confirmation nor message encryption is used.

For AuthPriv and AuthNoPriv security levels, choose a the desired Authentication Protocol. Two authentication protocols are available:

Secure Hash Algorithm (SHA)

Message Digest algorithm (MD5)

The authentication protocols are used to build the message digest when the message is authenticated.

Privacy Protocol (used for the AuthPriv security level) is used to encrypt/decrypt messages. USM uses the Data Encryption Standard (DES). The Privacy Password is used in conjunction with the Privacy Protocol. the privacy password on both the SNMP Agent and SNMP Manager must match in order for encryption/decryption to succeed.

Click OK.

The new USM username will appear in the User Security Model Entries table. When creating new SNMP V3 Trap notification methods, the USM username will appear as a selectable option from the Existing Entries drop-down menu.

After editing the USM, you should verify the change via the notification methods that use it.