I'm not exactly sure what you are asking for!?
Is tit about how to setup SNMP (http://blogs.vmware.com/vsphere/2012/11/configuring-snmp-v1v2cv3-using-esxcli-5-1.html) or where you can find the mib modules (http://communities.vmware.com/community/vmtn/developer/forums/managementapi)?
André