If you configure the vCenter Server Appliance SNMP agent for polling, it can listen for and respond to requests from SNMP management client systems, such as GET, GETNEXT, and GETBULK requests. The vCenter Server Appliance supports only notifications such as v1 and v2c traps, and v3 traps with all security levels. You configure the agent differently depending on whether you want to use SNMP v1/v2c or SNMP v3. You can use the appliance shell API commands to enable and configure the vCenter Server Appliance SNMP agent.
The vCenter Server Appliance includes an SNMP agent that can send trap notifications and receive GET, GETBULK, and GETNEXT requests.