Enable SNMP on VSphere ESXi 5.5

Below is the command needed to enable SNMP on VSphere 5.5:

esxcli system snmp set --communities SNMP_STRING_HERE
esxcli system snmp set --enable true
esxcli network firewall ruleset set --ruleset-id snmp --allowed-all true
esxcli network firewall ruleset set --ruleset-id snmp --enabled true
/etc/init.d/snmpd restart

change SNMP_STRING_HERE with community string that you are going to use