RFC 2020 (rfc2020) - Page 3 of 31

IEEE 802

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RFC 2020               IEEE 802.12 Interface MIB            October 1996


   To the extent that some of the attributes defined in [6] are
   represented by previously defined objects in the Internet-standard
   MIB [5] or in the Evolution of the Interfaces Group of MIB-II [7],
   such attributes are not redundantly represented by objects defined in
   this memo.  Among the attributes represented by objects defined in
   other memos are the number of octets transmitted or received on a
   particular interface, the MAC address of an interface, and multicast
   information associated with an interface.

3.1.  MAC Addresses

   All representations of MAC addresses in this MIB module, and in other
   related MIB modules (like RFC 1573), are in "canonical" order defined
   by 802.1a, i.e., as if it were transmitted least significant bit
   first.  This is true even if the interface is operating in token ring
   framing mode, which requires MAC addresses to be transmitted most
   significant bit first.

3.2.  Relation to RFC 1213

   This section applies only when this MIB is used in conjunction with
   the "old" (i.e., pre-RFC 1573) interface group.

   The relationship between an IEEE 802.12 interface and an interface in
   the context of the Internet-standard MIB is one-to-one.  As such, the
   value of an ifIndex object instance can be directly used to identify
   corresponding instances of the objects defined herein.

3.3.  Relation to RFC 1573

   RFC 1573, the Interface MIB Evolution, requires that any MIB which is
   an adjunct of the Interface MIB, clarify specific areas within the
   Interface MIB.  These areas are intentionally left vague in RFC 1573
   to avoid over constraining the MIB, thereby precluding management of
   certain media-types.

   An agent which implements this MIB module must support the
   ifGeneralGroup, ifStackGroup, ifHCPacketGroup, and ifRcvAddressGroup
   of RFC 1573.

   Section 3.3 of RFC 1573 enumerates several areas which a media-
   specific MIB must clarify.  In addition, there are some objects in
   RFC 1573 for which additional clarification of how to apply them to
   an IEEE 802.12 interface would be helpful.  Each of these areas is
   addressed in a following subsection.  The implementor is referred to
   RFC 1573 in order to understand the general intent of these areas.





Flick                       Standards Track
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