These branches have short text strings and integers (object identifiers) to identify them. Text strings describe object names. Integers allow software to create compact, encoded representations of the names.
Each MIB variable is assigned an
object identifier (OID). The OID is the sequence of numeric labels on the nodes
along a path from the root to the object. For example, as shown in the following
figure, the sysDescr
is:
1.3.6.1.2.1.1.1
The corresponding name is:
iso.org.dod.internet.mgmt.mib-2.system.sysDescr
1.3.6.1.2.1.47
The corresponding name is:
iso.org.dod.internet.mgmt.mib-2.entityMIB
The other branches are part of the standard MIBs.
You can use a MIB browser to access the MIB variables. All MIB browsers load MIBs and perform queries.
Once the MIBs are loaded, read-only access provides access levels between the agent and management station. The access levels are described in the following table.
| Access level | Description |
|---|---|
| Not accessible/None | You cannot read or write to this variable. |
| Read-create | Specifies a tabular object that can be read, modified, or created as a new row in a table. |
| Read-only | You can only monitor information. |
| Read-write | You can read or modify this variable. |
| Accessible-to-notify | You can read this information only through traps. |