http://support.ipmonitor.com/mibs/network-appliance-mib/tree.aspx
http://www.360doc.com/content/10/1025/10/737570_63789902.shtml
http://chenlinux.com/2010/12/22/monitor-netapp-by-net-snmp/
http://www.oidview.com/mibs/789/NETWORK-APPLIANCE-MIB.html
http://www.it165.net/admin/html/201309/1818.html