Extreme Networks Summit WM3000 Series Reference Manual page 432

Controller Management
3 Refer to the following read-only statistics displayed within the SNMP Access Statistics screen:
V2/V3 Metrics
Values
Usm Statistics
Values
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Displays the individual SNMP Access events capable of having a value
tracked for them. The metrics range from general SNMP events (such as
the number of SNMP packets in and out) to specific error types that can
be used for troubleshooting SNMP events (such as Bad Value and Read-
Only errors).
Displays the current numerical value for the SNMP V2/V3 Metric
described on the left-hand side of the screen. The value equals the
number of times the target event has occurred. This data is helpful in
troubleshooting SNMP related problems within the network.
Displays SNMP v3 events specific to Usm. The
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.
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.
User-based Security
Summit WM3000 Series Controller System Reference Guide