Configuring Authentication (C-Web Interface)
To configure the authentication type for SNMPv3 users:
Click Configure, and expand SNMP>V3>USM>Local Engine.
To configure MD5 authentication, from the side pane, expand the name of the user, and click Authentication MD5.
To configure SHA authentication, from the side pane, expand the name of the user, and click Authentication SHA.
Specify the authentication password as described in the Help text in the main pane, and then click Create.
The password must be at least eight characters.