When you configure the ESXi SNMP agent for SNMP v3, the agent supports sending informs as well as traps. SNMP v3 also provides stronger security than v1 or v2c, including key authentication and encryption.

An inform is a notification that the sender will resend up to 3 times or until the notification is acknowledged by the receiver.

1

Every SNMP v3 agent has an engine ID which serves as a unique identifier for the agent. The engine ID is used with a hashing function to generate keys for authentication and encryption of SNMP v3 messages.

2

SNMP v3 optionally supports authentication and privacy protocols.

3

You can configure up to 5 users who can access SNMP v3 information. Usernames must be no more than 32 characters long.

4

Configure SNMP v3 targets to allow the ESXi SNMP agent to send SNMP v3 traps and informs.