It is recommended that the implementors consider the security
features as provided by the SNMPv3 framework. Specifically, the use
of the User-based Security Model RFC2574 [12] and the View-based
Access Control Model RFC2575 [15] are recommended.
It is then the customer/user's responsibility to ensure that the SNMP
entity giving access to an instance of this MIB, is properly
configured to give access to those objects only to those principals
(users) that have legitimate rights to access them.
HDSL2-SHDSL layer connectivity from the xtuR will permit the
subscriber to manipulate both the HDSL2-SHDSL link directly and the
HDSL2-SHDSL embedded operations channel (EOC) for their own loop.
For example, unchecked or unfiltered fluctuations initiated by the
subscriber could generate sufficient notifications to potentially
overwhelm either the management interface to the network or the
element manager.
It should be noted that interface indices in this MIB are maintained
persistently. VACM data relating to these should be stored
persistently.
There are a number of management objects defined in this MIB that
have a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations.
8. Acknowledgments
The authors are deeply grateful to the authors of the ADSL LINE MIB
(RFC2662 [23]), Gregory Bathrick and Faye Ly, as much of the text
and structure of this document originates in their documents.
The authors are also grateful to the authors of FR MFR MIB (RFC3020
[24]), Prayson Pate, Bob Lynch, and Kenneth Rehbehn, as the majority
of the Security Considerations section was lifted from their
document.
The authors also acknowledge the importance of the contributions and
suggestions regarding interface indexing structures received from
David Horton of CITR.
Other contributions were received from the following:
Philip Bergstresser (Adtran)
Steve Blackwell (Centillium)
Umberto Bonollo (NEC Australia)
Yagal Hachmon (RAD)
Mark Johnson (Red Point)
Sharon Mantin (Orckit)
Moti Morgenstern (ECI)
Raymond Murphy (Ericsson)
Lee Nipper (Verilink)
Randy Presuhn (BMC Software)
Katy Sherman (Orckit)
Mike Sneed (ECI)
Jon Turney (DSL Solutions)
Aron Wahl (Memotec)
Bert Wijnen (Lucent)
Michael Wrobel (Memotec)
9. References
[1] Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for
Describing SNMP Management Frameworks", RFC2571, April 1999.
[2] Rose, M. and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based Internets", STD 16, RFC
1155, May 1990.
[3] Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16,
RFC1212, March 1991.
[4] Rose, M., "A Convention for Defining Traps for use with the
SNMP", RFC1215, March 1991.
[5] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC2578, April 1999.
[6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Textual Conventions for SMIv2", STD 58,
RFC2579, April 1999.
[7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose,
M. and S. Waldbusser, "Conformance Statements for SMIv2", STD
58, RFC2580, April 1999.
[8] Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
Network Management Protocol", STD 15, RFC1157, May 1990.
[9] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
"Introduction to Community-based SNMPv2", RFC1901, January
1996.
[10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
"Transport Mappings for Version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC1906, January 1996.
[11] Case, J., Harrington D., Presuhn, R. and B. Wijnen, "Message
Processing and Dispatching for the Simple Network Management
Protocol (SNMP)", RFC2572, April 1999.
[12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
for version 3 of the Simple Network Management Protocol
(SNMPv3)", RFC2574, April 1999.
[13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol
Operations for Version 2 of the Simple Network Management
Protocol (SNMPv2)", RFC1905, January 1996.
[14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC
2573, April 1999.
[15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
Control Model (VACM) for the Simple Network Management Protocol
(SNMP)", RFC2575, April 1999.
[16] Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction
to Version 3 of the Internet-standard Network Management
Framework", RFC2570, April 1999.
[17] Bradner, S., "Key Words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC2119, March 1997.
[18] American National Standards Institute, ANSI T1E1.4/2000-006,
February 2000.
[19] Blackwell, S., Editor, "Single-Pair High-Speed Digital
Subscriber Line (SHDSL) Transceivers", ITU-T Draft G.991.2,
April 2000.
[20] McCloghrie, K. and M. Rose, M., "Management Information Base
for Network Management of TCP/IP-based internets: MIB-II", STD
17, RFC1213, March 1991.
[21] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
RFC2863, June 2000.
[22] Tesink, K., "Textual Conventions for MIB Modules Using
Performance History Based on 15 Minute Intervals", RFC2493,
January 1999.
[23] Bathrick, G. and F. Ly, "Definitions of Managed Objects for the
ADSL Lines", RFC2662, August 1999.
[24] Pate, P., Lynch, B. and K. Rehbehn, "Definitions of Managed
Objects for Monitoring and Controlling the UNI/NNI Multilink
Frame Relay Function", RFC3020, December 2000.
[25] American National Standards Institute, "Coded Identification of
Equipment Entities of the North American Telecommunications
System for the Purpose of Information Exchange", T1.213-2001.
10. Intellectual Property Notice
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11. Authors' Addresses
Bob Ray
PESA Switching Systems, Inc.
330-A Wynn Drive
Huntsville, AL 35805 USA
Phone: +1 256 726 9200 ext. 142
Fax: +1 256 726 9271
EMail: rray@pesa.com
Rajesh Abbi
Alcatel USA
2912 Wake Forest Road
Raleigh, NC 27609-7860 USA
Phone: +1 919-850-6194
Fax: +1 919-850-6670
EMail: Rajesh.Abbi@alcatel.com
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