RFC 1369 (rfc1369) - Page 2 of 7


Implementation Notes and Experience for the Internet Ethernet MIB



Alternative Format: Original Text Document



RFC 1369              Ethernet MIB Implementations          October 1992


   This document reflects the currently known status of 11 different
   implementations of the MIB by 7 different vendors on 7 different
   Ethernet interface chips.

2.  Observations

   There are some interesting points to be noted from this information:

   1)  Only 4 variables are actually implemented in all
       implementations: AlignmentErrors, FCSErrors,
       ExcessiveCollisions and InternalMacTransmitErrors.

   2)  There were another five variables implemented in all but
       one of the reported implementations,
       SingleCollisionFrames, MultipleCollisionFrames,
       LateCollisions, FrameTooLongs, and CarrierSenseErrors.

       Three of these variables exist in implementations that
       use the same chip as the implementation that does not
       contain the variable.  Specifically:

    A)   SingleCollisionFrames is not implemented in
         implementation number 3, which uses the AMD LANCE.
         However, other AMD LANCE implementations (7, 8, and 10)
         do implement the variable, implying that it is
         available on the LANCE.

    B)   MultipleCollisionFrames is not implemented in
         implementation number 3, which uses the AMD LANCE.
         However, other AMD LANCE implementations (7, 8, and 10)
         do implement the variable, implying that it is
         available on the LANCE.

    C)   LateCollisions is not implemented in implementation
         number 1, which uses the Intel 82586. However, another
         Intel 82586 based implementation (11) does implement
         the variable, implying that it is available on the
         Intel 82586.

    D)   CarrierSenseErrors is not implemented on implementation
         number 2, which is based on the Fujitsu 86950 chip.
         However, there is only one implementation based on this
         chip and I have not been able to locate a data sheet on
         this part so no conclusion can be drawn at this time.

    E)   FrameTooLongs is not implemented on implementation
         number 5, which is based on the National NIC 8390 chip.
         However, there is only one implementation based on this



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