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Internet Engineering Task Force (IETF)                          E. Beili
Request for Comments: 7124                              Actelis Networks
Updates: 5066                                              February 2014
Category: Standards Track
ISSN: 2070-1721

        Ethernet in the First Mile Copper (EFMCu) Interfaces MIB

Abstract

   This document updates RFC 5066.  It amends that specification by
   informing the Internet community about the transition of the
   EFM-CU-MIB module from the concluded IETF Ethernet Interfaces and Hub
   MIB Working Group to the Institute of Electrical and Electronics
   Engineers (IEEE) 802.3 working group.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/RFC 7124.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Beili                        Standards Track                    [Page 1]
RFC 7124 EFMCu Interfaces MIB February 2014 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. The Internet-Standard Management Framework . . . . . . . . . 3 3. Mapping between EFM-CU-MIB and IEEE8023-EFM-CU-MIB . . . . . 3 4. Updating the MIB Modules . . . . . . . . . . . . . . . . . . 3 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 5 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.1. Normative References . . . . . . . . . . . . . . . . . . 5 7.2. Informative References . . . . . . . . . . . . . . . . . 5 1. Introduction RFC 5066 [RFC 5066] defines two MIB modules: EFM-CU-MIB, with a set of objects for managing 10PASS-TS and 2BASE-TL Ethernet in the First Mile Copper (EFMCu) interfaces; IF-CAP-STACK-MIB, with a set of objects describing cross-connect capability of a managed device with multi-layer (stacked) interfaces, extending the stack management objects in the Interfaces Group MIB and the Inverted Stack Table MIB modules. With the conclusion of the [HUBMIB] working group, the responsibility for the maintenance and further development of a MIB module for managing 2BASE-TL and 10PASS-TS interfaces has been transferred to the Institute of Electrical and Electronics Engineers (IEEE) 802.3 [IEEE802.3] working group. In 2011, the IEEE developed the IEEE8023-EFM-CU-MIB module, based on the original EFM-CU-MIB module [RFC 5066]. The current revision of IEEE8023-EFM-CU-MIB is defined in IEEE STD 802.3.1-2013 [IEEE802.3.1]. The IEEE8023-EFM-CU-MIB and EFM-CU-MIB MIB modules can coexist. Existing deployments of the EFM-CU-MIB need not be upgraded, but operators using the MIB should expect that new equipment will use the IEEE8023-EFM-CU-MIB. Please note that the IF-CAP-STACK-MIB module was not transferred to IEEE and remains as defined in RFC 5066. This memo provides an updated security considerations section for that module, since the original RFC did not list any security considerations for IF-CAP-STACK-MIB. Beili Standards Track [Page 2]
RFC 7124 EFMCu Interfaces MIB February 2014 2. The Internet-Standard Management Framework For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC 3410]. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC 2119]. 3. Mapping between EFM-CU-MIB and IEEE8023-EFM-CU-MIB The current version of IEEE8023-EFM-CU-MIB, defined in IEEE Std 802.3.1-2013, has MODULE-IDENTITY of ieee8023efmCuMIB with an object identifier allocated under the { iso(1) iso-identified-organization(3) ieee(111) standards-association-numbered-series-standards(2) lan-man-stds(802) ieee802dot3(3) ieee802dot3dot1mibs(1) } sub-tree. The EFM-CU-MIB has MODULE-IDENTITY of efmCuMIB with an object identifier allocated under the mib-2 sub-tree. The names of the objects in the first version of the IEEE8023-EFM-CU-MIB are identical to those in the EFM-CU-MIB. However, since both MIB modules have different OID values, they can coexist, allowing the management of the newer IEEE MIB-based devices alongside the legacy IETF MIB-based devices. 4. Updating the MIB Modules With the transfer of the responsibility for maintenance and further development of the EFM-CU-MIB module to the IEEE 802.3 working group, the EFM-CU-MIB defined in RFC 5066 becomes the last version of that MIB module. All further development of the EFM Copper Interfaces MIB will be done by the IEEE 802.3 working group in the IEEE8023-EFM-CU-MIB module. Requests and comments pertaining to EFM Copper Interfaces MIB should be sent to the IEEE 802.3.1 task force, currently chartered with MIB development, via its mailing list [LIST802.3.1]. The IF-CAP-STACK-MIB remains under IETF control and is currently maintained by the [OPSAWG] working group. Beili Standards Track [Page 3]
RFC 7124 EFMCu Interfaces MIB February 2014 5. Security Considerations There are no managed objects defined in the IF-CAP-STACK-MIB module with a MAX-ACCESS clause of read-write and/or read-create. So, if this MIB module is implemented correctly, then there is no risk that an intruder can alter or create any management objects of this MIB module via direct SNMP SET operations. Some of the readable objects in this MIB module (i.e., objects with a MAX-ACCESS other than not-accessible) may be considered sensitive or vulnerable in some network environments. In particular, ifCapStackStatus and ifInvCapStackStatus can identify cross-connect capability of multi-layer (stacked) network interfaces, potentially revealing the underlying hardware architecture of the managed device. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPsec), there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB module. Implementations SHOULD provide the security features described by the SNMPv3 framework (see [RFC 3410]), and implementations claiming compliance to the SNMPv3 standard MUST include full support for authentication and privacy via the User-based Security Model (USM) [RFC 3414] with the AES cipher algorithm [RFC 3826]. Implementations MAY also provide support for the Transport Security Model (TSM) [RFC 5591] in combination with a secure transport such as SSH [RFC 5592] or TLS/DTLS [RFC 6353]. Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them. Beili Standards Track [Page 4]
RFC 7124 EFMCu Interfaces MIB February 2014 6. Acknowledgments This document was produced by the OPSAWG working group, whose efforts were advanced by the contributions of the following people (in alphabetical order): Dan Romascanu David Harrington Michael MacFaden Tom Petch This document updates RFC 5066, authored by Edward Beili of Actelis Networks, and produced by the now-concluded HUBMIB working group. 7. References 7.1. Normative References [RFC 2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC 3414] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", STD 62, RFC 3414, December 2002. [RFC 3826] Blumenthal, U., Maino, F., and K. McCloghrie, "The Advanced Encryption Standard (AES) Cipher Algorithm in the SNMP User-based Security Model", RFC 3826, June 2004. [RFC 5066] Beili, E., "Ethernet in the First Mile Copper (EFMCu) Interfaces MIB", RFC 5066, November 2007. 7.2. Informative References [HUBMIB] IETF, "Ethernet Interfaces and Hub MIB (hubmib) Charter", <http://datatracker.ietf.org/wg/hubmib/charter/>. [IEEE802.3.1] IEEE, "IEEE Standard for Management Information Base (MIB) Definitions for Ethernet", IEEE STD 802.3.1-2013, June 2013, <http://standards.ieee.org/getieee802/download/ 802.3.1-2013.pdf>. Beili Standards Track [Page 5]
RFC 7124 EFMCu Interfaces MIB February 2014 [IEEE802.3] IEEE, "802.3 Ethernet Working Group", <http://www.ieee802.org/3>. [LIST802.3.1] IEEE, "802.3 MIB Email Reflector", <http://www.ieee802.org/3/be/reflector.html>. [OPSAWG] IETF, "Operations and Management Area Working Group (opsawg) Charter", <http://datatracker.ietf.org/wg/opsawg/charter/>. [RFC 3410] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction and Applicability Statements for Internet- Standard Management Framework", RFC 3410, December 2002. [RFC 5591] Harrington, D. and W. Hardaker, "Transport Security Model for the Simple Network Management Protocol (SNMP)", RFC 5591, June 2009. [RFC 5592] Harrington, D., Salowey, J., and W. Hardaker, "Secure Shell Transport Model for the Simple Network Management Protocol (SNMP)", RFC 5592, June 2009. [RFC 6353] Hardaker, W., "Transport Layer Security (TLS) Transport Model for the Simple Network Management Protocol (SNMP)", RFC 6353, July 2011. Author's Address Edward Beili Actelis Networks Bazel 25 Petach-Tikva 49103 Israel Phone: +972-73-237-6852 EMail: edward.beili@actelis.com Beili Standards Track [Page 6]