ESXi enable snmp service

In everyday use, we may use snmp service to monitor the health of ESXi, chapter summary, I will simply combing enable snmp service for ESXi.
In the following edit ESXi host profile /etc/vmware/snmp.xml
details are as follows:
<XML Version = "1.0" encoding = "the ISO-8859-1"??>
<Config> <snmpSettings> <enable> to true < / enable> <port> 161 < / port> <syscontact> </ syscontact> <syslocation> </ syslocation> <EnvEventSource> indications </ EnvEventSource> <communities> public </ communities> <engineid> 00000063000000a100000000 </ engineid> < loglevel> info </ loglevel> < authProtocol> </ authProtocol> <privProtocol> </ privProtocol> <largestorage> true </ largestorage> </ snmpSettings> </ config>
finished modifying the configuration file after start the service.
/ etc / init.