Network Working Group M. Schoffstall
Request for Comments: 1089
Rensselaer Polytechnic Institute
MIT Laboratory for Computer Science
University of Tennessee at Knoxville
SNMP over Ethernet
Status of This Memo
This memo describes an experimental method by which the Simple
Network Management Protocol (SNMP) as specified in  can be used
over Ethernet MAC layer framing  instead of the Internet UDP/IP
protocol stack. This specification is useful for LAN based network
elements that support no higher layer protocols beyond the MAC sub-
layer. Distribution of this memo is unlimited.
Overview and Rational
SNMP has been successful in managing Internet capable network
elements which support the protocol stack at least through UDP the
connectionless Internet transport layer protocol. As originally
designed, SNMP is capable of running over any reasonable transport
mechanism (not necessarily a transport protocol) that supports bi-
directional flow and addressability.
Many non-Internet capable network elements are present in local
networks; for example, repeaters and wiring concentrators. They
include both addressability, and programmable intelligence. These
devices are widely used and increasingly important yet, for the most
part, invisible except through proprietary mechanisms.
Almost all Internet capable network elements use the same mechanism
for encapsulation of the Internet protocol stack regardless of
conformity with the physical characteristics of Ethernet or 802.3,
this mechanism is specified in  and . This specification
continues that style with the assignment (by XEROX) of 33100
(hexadecimal 814C) to the Ethernet Type field for SNMP. The data
portion of the Ethernet frame would then be a standard SNMP message
as specified in .
 Case, J., Fedor, M., Schoffstall, M., and J. Davin, "A Simple
Network Management Protocol", RFC-1067
, University of
Tennessee at Knoxville, NYSERNet, Inc., Rensselaer Polytechnic
Institute, and Proteon, Inc., August 1988.
 DEC, "The Ethernet - A Local Area Network", Version 2.0,
Digital Equipment Corporation, Intel Corporation, Xerox
 Hornig, C., "A Standard for the Transmission of IP Datagrams
over Ethernet Networks", RFC-894
, Symbolics, April 1984.
 Postel, J., and J. Reynolds, "A Standard for the Transmission
of IP Datagrams over IEEE 802 Networks", RFC-1042
Information Sciences Institute, February 1988.
Rensselaer Technology Park
165 Jordan Road
Troy, NY 12180
Phone: (518) 276-2654
MIT Laboratory for Computer Science, NE43-507
545 Technology Square
Cambridge, MA 02139
Phone: (617) 253-6020