vicfg-snmp.pl

   --communities
    -c
        Set communities separated by comma comm1[,...] (this overwrites previous settings)

C:\Program Files\VMware\VMware vSphere CLI\bin>vicfg-snmp.pl --server 192.168.1.190 --username root --password password -c public -t 192.168.1.80@162/public
Changing community list to: public...
Complete.
Changing notification(trap) targets list to: 192.168.1.80@162/public...
Complete.

C:\Program Files\VMware\VMware vSphere CLI\bin>vicfg-snmp.pl --server 192.168.1.190 --username root --password password --enable
Enabling agent...
Complete.

C:\Program Files\VMware\VMware vSphere CLI\bin>vicfg-snmp.pl --server 192.168.1.190 --username root --password password --test
Sending test nofication(trap) to all configured targets...
Complete. Check with each target to see if trap was received.

C:\Program Files\VMware\VMware vSphere CLI\bin>vicfg-snmp.pl --server 192.168.1.190 --username root --password password --disable
Disabling agent...
Complete.