3Com Baseline 2928 PWR Plus User Manual page 158

The configuration on NMS must be consistent with that on the agent. Otherwise, you cannot perform
corresponding operations.
SNMPv3 adopts a security mechanism of authentication and privacy. You need to configure username
and security level. According to the configured security level, you need to configure the related
authentication mode, authentication password, privacy mode, privacy password, and so on.
Besides, you need to configure the aging time and retry times. After the above configurations, you can
configure the device as needed through the NMS. For related configurations, refer to the manual
provided for NMS.
Configuration verification
After the above configuration, the NMS can establish an SNMP connection with the agent and
query and reconfigure values of objects in the agent MIB.
If an idle interface on the agent is shut down or brought up, the NMS will receive a trap information
sent by the agent.
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