Enable SNMP on ESX(i)

Open SSH and Putty in to your device. Then

esxcli system snmp set -r

esxcli system snmp set -c <community.name.you.want>

esxcli system snmp set -p 161

esxcli system snmp set -L "<City>,<Country>"

esxcli system snmp set -C <noc@example.com>

esxcli system snmp set -e yes

Now start the SNMP service through the UI and you are done.

Connect with SNMP V2.