Network Working Group
Request for Comments: 1089
M. Schoffstall
Rensselaer Polytechnic Institute
C. Davin
MIT Laboratory for Computer Science
M. Fedor
NYSERNet, Inc.
J. Case
University of Tennessee at Knoxville
February 1989

SNMP over Ethernet

Status of This Memo

This memo describes an experimental method by which the Simple Network Management Protocol (SNMP) as specified in [1] can be used over Ethernet MAC layer framing [2] 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 [3] and [4]. 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 [1].


     [1]  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.
     [2]  DEC, "The Ethernet - A Local Area Network", Version 2.0,
          Digital Equipment Corporation, Intel Corporation, Xerox
     [3]  Hornig, C., "A Standard for the Transmission of IP Datagrams
          over Ethernet Networks", RFC-894, Symbolics, April 1984.
     [4]  Postel, J., and J. Reynolds, "A Standard for the Transmission
          of IP Datagrams over IEEE 802 Networks", RFC-1042, USC
          Information Sciences Institute, February 1988.

Authors' Addresses

Marty Schoffstall
Rensselaer Technology Park
165 Jordan Road
Troy, NY 12180


          (518) 276-2654

Chuck Davin
MIT Laboratory for Computer Science, NE43-507
545 Technology Square
Cambridge, MA 02139


          (617) 253-6020

Mark Fedor
Nysernet, Inc.
Rensselaer Technology Park
125 Jordan Road
Troy, NY 12180
(518) 283-8860


          (518) 283-8860
   EMail: fedor@patton.NYSER.NET

Jeff Case
University of Tennessee Computing Center
Associate Director
200 Stokely Management Center
Knoxville, TN 37996-0520


          (615) 974-6721
   EMail: case@UTKUX1.UTK.EDU