SNMP Enterprise Numbers

The SNMP MIB tree has parts that are universal and reflect various RFC standards; that is, each SNMP-enabled device supports the common lot of these functions; for example, sysDescr or .1.3.6.1.2.1.1.1.0 under mib-2-system returns the name of the device.

When you want to return data specific to your device, use the iso.org.dod.internet.private.enterprises path or under .1.3.6.1.4.1.x, where x is the unique number assigned to an organization or piece of equipment. Microsoft's number is 311; that is, anything under .1.3.6.1.4.1.311.y is a Microsoft MIB item. Plant SCADA's number is 6216.

These enterprise numbers are needed in a global WAN so that every unique piece of equipment in the world can be identified. In a private network, you can essentially use any enterprise number you want. You can obtain new numbers from http://www.iana.org/cgi-bin/enterprise.pl.

You can use this number when generating user-defined traps. The number .1.3.6.1.4.1.6216.1.x is reserved by Plant SCADA for internal use and testing. Users are free to use .1.3.6.1.4.1.6216.2.y , .1.3.6.1.4.1.6216.3.y, and so on.