Cabletron Systems ATX, Reference Manual

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Navigating Through the MIB Tree Structure
ATX MIB Reference Guide 1-7
Many parameters are described by existing Management Information Base
(MIB) documents. The meanings of those parameters are not always
implemented exactly by the unit; instead, the parameters are treated as best as can
be correlated to the unit’s parameters. The unit’s parameters that cannot be
correlated are part of a Cabletron proprietary MIB, called:
2
sigma OBJECT IDENTIFIER = {enterprises 97}
The parameters and traps which are supported are described in the chapters that
follow.
1.7 NAVIGATING THROUGH THE MIB TREE
STRUCTURE
The MIB structure is a hierarchical tree structure. Each MIB variable has a
numeric value that indicates its place in the hierarchy. The structure was
originally created, and is still maintained by the International Organization for
Standardization (ISO) and the International Telecommunications Union (ITU),
two international standards organizations. You can get and set MIB variables by
navigating down the tree to a specific MIB, a group or table within that MIB, and
then to the individual variable. Figure 1-1 shows the path down the MIB tree
structure. Under the “mib-2” and the Cabletron enterprise branch, are all the
relevant MIBs that the unit supports.
2.
Usually, it is better to support a standard parameter in a non-standard fashion, than not
support the standard parameter at all. Deciding what constitutes an acceptable deviation is
a gray area.