Motorola Series Switch WS5100 - Manual (Page 318)

7-10 WS5100 Series Switch System Reference Guide
Usm Statistics Displays SNMP v3 events specific to Usm. The User-based Security Model (USM) decrypts
incoming messages. The module then verifies authentication data. For outgoing messages,
the USM module encrypts PDUs and generates authentication data. The module then passes
the PDUs to the message processor, which then invokes the dispatcher.
The USM module's implementation of the SNMP-USER-BASED-SM-MIB enables SNMP to
issue commands to manage users and security keys. The MIB also enables the agent to
ensure a requesting user exists and has the proper authentication information. When
authentication is done, the request is carried out by the agent.
Values Displays the current numerical value for the Usm Metric described on the left-hand side of
the screen. The value equals the number of times the target event occurred. This data is
helpful in troubleshooting Usm (Authentication and Encryption) related problems within the
network.