Before you enable the ESXi embedded SNMP agent, you must configure at least one community for the agent.
An SNMP community defines a group of devices and management systems. Only devices and management systems that are members of the same community can exchange SNMP messages. A device or management system can be a member of multiple communities.
To configure SNMP communities, run esxcli system snmp set or vicfg-snmp -c, specifying a comma-separated list of communities as shown in the following examples.
esxcli system snmp set -c public, internal
vicfg-snmp <conn_options> -c public, internal
Each time you specify a community with this command, the settings that you specify overwrite the previous configuration.