RFC 1284 (rfc1284) - Page 3 of 21

Definitions of Managed Objects for the Ethernet-like Interface Types

RFC 1284                 ETHERNET-LIKE OBJECTS             December 1991


4.  Overview

   Instances of these object types represent attributes of an interface
   to an ethernet-like communications medium.  At present, ethernet-like
   media are identified by three values of the ifType object in the
   Internet-standard MIB:

               ethernet-csmacd(6)
               iso88023-csmacd(7)
               starLan(11)

   For these interfaces, the value of the ifSpecific variable in the
   MIB-II [6] has the OBJECT IDENTIFIER value:

               dot3    OBJECT IDENTIFER ::= { transmission 7 }

   The definitions presented here are based on the IEEE 802.3 Layer
   Management Specification [9], as originally interpreted by Frank
   Kastenholz of Interlan in [10].  Implementors of these MIB objects
   should note that the IEEE document explicitly describes (in the form
   of Pascal pseudocode) when, where, and how various MAC attributes are
   measured.  The IEEE document also describes the effects of MAC
   actions that may be invoked by manipulating instances of the MIB
   objects defined here.

   To the extent that some of the attributes defined in [9] are
   represented by previously defined objects in the Internet-standard
   MIB or in the generic interface extensions MIB [11], 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 number of frames transmitted or received on a
   particular interface, the promiscuous status of an interface, the MAC
   address of an interface, and multicast information associated with an
   interface.

   The relationship between an ethernet-like 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.











Transmission MIB Working Group