3. CONFIGURATION
Each monitored value is uniquely identified using a numerical identifier
OID – Object Iden-
tifier
. This identifier consists of a progression of numbers separated by a point. The shape
of each OID is determined by the identifier value of the parent element and then this value is
complemented by a point and current number. So it is obvious that there is a tree structure.
The following figure displays the basic tree structure that is used for creating the OIDs.
Figure 50: OID Basic Structure
The SNMP values that are specific for Conel routers create the tree starting at OID =
.1.3.6.1.4.1.30140. You interpret the OID in the following manner:
iso.org.dod.internet.private.enterprises.conel
This means that the router provides for example, information about the binary input and
output. The following table shows the range of used OID values:
OID
Description
.1.3.6.1.4.1.30140.2.3.1.0
Binary input BIN0 (values 0,1)
.1.3.6.1.4.1.30140.2.3.2.0
Binary output OUT0 (values 0,1)
Table 55: Object identifier for binary input and output
77
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