MIB and view-based MIB access control
A MIB stores variables called "nodes" or "objects" in a tree hierarchy and identifies each node with a unique OID. An OID is a dotted numeric string that uniquely identifies the path from the root node to a leaf node. For example, object B in Figure 46 is uniquely identified by the OID {1.2.1.1}.
Figure 46: MIB tree
A MIB view represents a set of MIB objects (or MIB object hierarchies) with certain access privileges and is identified by a view name. The MIB objects included in the MIB view are accessible while those excluded from the MIB view are inaccessible.
A MIB view can have multiple view records each identified by a view-name oid-tree pair.
You control access to the MIB by assigning MIB views to SNMP groups or communities.