Management information for 802.3 repeaters.

The following references are used throughout
this MIB module:

[IEEE 802.3 Std]
    refers to IEEE 802.3/ISO 8802-3 Information
    processing systems - Local area networks -
    Part 3: Carrier sense multiple access with

    collision detection (CSMA/CD) access method
    and physical layer specifications (1993).

[IEEE 802.3 Mgt]
    refers to IEEE 802.3u-1995, '10 Mb/s &
    100 Mb/s Management, Section 30,'
    Supplement to ANSI/IEEE 802.3.

The following terms are used throughout this
MIB module.  For complete formal definitions,
the IEEE 802.3 standards should be consulted
wherever possible:

System - A managed entity compliant with this
MIB, and incorporating at least one managed
802.3 repeater.

Chassis - An enclosure for one managed repeater,
part of a managed repeater, or several managed
repeaters.  It typically contains an integral
power supply and a variable number of available
module slots.

Repeater-unit - The portion of the repeater set
that is inboard of the physical media interfaces.
The physical media interfaces (MAUs, AUIs) may be
physically separated from the repeater-unit, or
they may be integrated into the same physical
package.

Trivial repeater-unit - An isolated port that can
gather statistics.

Group - A recommended, but optional, entity
defined by the IEEE 802.3 management standard,
in order to support a modular numbering scheme.
The classical example allows an implementor to
represent field-replaceable units as groups of
ports, with the port numbering matching the
modular hardware implementation.

System interconnect segment - An internal
segment allowing interconnection of ports
belonging to different physical entities
into the same logical manageable repeater.
Examples of implementation might be
backplane busses in modular hubs, or
chaining cables in stacks of hubs.

Stack - A scalable system that may include
managed repeaters, in which modularity is
achieved by interconnecting a number of
different chassis.

Module - A building block in a modular
chassis.  It typically maps into one 'slot';
however, the range of configurations may be
very large, with several modules entering
one slot, or one module covering several
slots.