RFC3419

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Network Working Group M. Daniele Request for Comments: 3419 Consultant Category: Standards Track J. Schoenwaelder

                                                     TU Braunschweig
                                                       December 2002
          Textual Conventions for Transport Addresses

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2002). All Rights Reserved.

Abstract

This document introduces a Management Information Base (MIB) module that defines textual conventions to represent commonly used transport-layer addressing information. The definitions are compatible with the concept of TAddress/TDomain pairs introduced by the Structure of Management Information version 2 (SMIv2) and support the Internet transport protocols over IPv4 and IPv6.

Introduction

Several MIB modules need to represent transport-layer addresses in a generic way. Typical examples are MIBs for application protocols that can operate over several different transports or application management MIBs that need to model generic communication endpoints.

The SMIv2 in STD 58, RFC 2579 RFC2579 defines the textual conventions TDomain and TAddress to represent generic transport layer endpoints. A generic TAddress value is interpreted in a given transport domain which is identified by a TDomain value. The TDomain is an object identifier which allows MIB authors to extend the set of supported transport domains by providing suitable definitions in standardized or enterprise specific MIB modules.

An initial set of TDomain values and concrete TAddress formats has been standardized in STD 62, RFC 3417 RFC3417. These definitions are however mixed up with SNMP semantics. Furthermore, definitions for Internet transport protocols over IPv4 and IPv6 are missing.

The purpose of this memo is to introduce a set of well-known textual conventions to represent commonly used transport-layer addressing information which is compatible with the original TDomain and TAddress approach and which includes definitions for additional Internet transport protocols over IPv4 and IPv6. This memo also introduces a new textual convention which enumerates the well-known transport domains since such an enumeration provides in many cases sufficient flexibility and is more efficient compared to object identifiers.

The key words "MUST", "MUST NOT", "SHOULD", "SHOULD NOT" and "MAY" in this document are to be interpreted as described in BCP 14, RFC 2119 RFC2119.

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 RFC3410.

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 RFC2578, STD 58, RFC 2579 RFC2579 and STD 58, RFC 2580 RFC2580.

Overview

This MIB module contains definitions for commonly used transport layer addressing information. In particular, it provides the following definitions:

1. Textual conventions for generic transport addresses

  (TransportAddress) and generic transport domains
  (TransportDomain).

2. Object identifier registrations for well-known transport domains.

3. An enumeration of the well-known transport domains, called a

  transport address type (TransportAddressType).

4. A set of textual conventions for the address formats used by

  well-known transport domains.  The DISPLAY-HINTs are aligned with
  the formats used in URIs RFC2396, RFC3291.

The textual conventions for well-known transport domains support scoped Internet addresses. The scope of an Internet address is a topological span within which the address may be used as a unique identifier for an interface or set of interfaces. A scope zone, or simply a zone, is a concrete connected region of topology of a given scope. Note that a zone is a particular instance of a topological region, whereas a scope is the size of a topological region [SCOPED]. Since Internet addresses on devices that connect multiple zones are not necessarily unique, an additional zone index is needed on these devices to select an interface. The textual conventions TransportAddressIPv4z and TransportAddressIPv6z are provided to support Internet transport addresses that include a zone index. In order to support arbitrary combinations of scoped Internet transport addresses, MIB authors SHOULD use a separate TransportDomain or TransportAddressType objects for each TransportAddress object.

There are two different ways how new transport domains and textual conventions for the address formats used by those new transport domains can be defined.

1. The MIB module contained in this memo can be updated and new

  constants for the TransportDomain and the TransportAddressType
  enumeration can be assigned.

2. Other MIB modules may define additional transport domains and

  associated textual conventions.  Such an extension can not update
  the TransportAddressType enumeration.

It is therefore a MIB designers choice whether he uses (a) a more compact TransportAddressType object with limited extensibility or (b) a more verbose TransportDomain object which allows arbitrary extensions in other MIB modules.

The MIB module contained in this memo does NOT define the transport mappings of any particular protocol. Rather, it defines a set of common identifiers and textual conventions that are intended to be used within various transport mappings documents.

Relationship to Other MIBs

This section discusses how the definitions provided by the MIB module contained in this memo relate to definitions in other MIB modules.

SNMPv2-TC (TAddress, TDomain)

The SNMPv2-TC MIB module RFC2579 defines the textual conventions TAddress and TDomain to represent generic transport addresses.

A TAddress is an octet string with a size between 1 and 255 octets. Experience has shown that there is sometimes a need to represent unknown transport addresses. The MIB module contained in this memo therefore introduces a new textual convention TransportAddress which is an octet string with a size between 0 and 255 octets and otherwise identical semantics. In other words, the sub-type TransportAddress (SIZE (1..255)) is identical with the TAddress defined in the SNMPv2-TC MIB module RFC2579.

This MIB module also introduces a new textual convention TransportDomain which is compatible with the TDomain definition so that a complete set of definitions is contained in a single MIB module. New MIB modules SHOULD use the generic TransportDomain, TransportAddressType and TransportAddress definitions defined in this memo. Existing MIB modules may be updated to use the definitions provided in this memo by replacing TDomain with TransportDomain and TAddress with TransportAddress (SIZE (1..255)).

SNMPv2-TM

The transport domain values defined in the SNMPv2-TM MIB module RFC3417 all contain "snmp" as the prefix in their name and are registered under `snmpDomains' (from RFC 2578 RFC2578). They were originally intended to describe SNMP transport domains only - but they were later also used for non-SNMP transport endpoints. These definitions are also incomplete since new transport address domains are needed to support (at least) SNMP over UDP over IPv6.

The transport domain values defined in this memo are independent of the protocol running over the transport-layer and SHOULD be used for all transport endpoints not carrying SNMP traffic. Programs that interpret transport domain values should in addition accept the transport domain values defined in the SNMPv2-TM MIB module in order to provide interoperability with existing implementations that use the SNMP specific transport domain values.

Transport endpoints which carry SNMP traffic SHOULD continue to use the definitions from the SNMPv2-TM MIB module where applicable. They SHOULD use the transport domain values defined in this memo for SNMP transports not defined in the SNMPv2-TM MIB module, such as SNMP over UDP over IPv6. Programs that interpret transport domain values should in addition accept all the transport domain values defined in this memo in order to provide interoperability in cases where it is not possible or desirable to distinguish the protocols running over a transport endpoint.

INET-ADDRESS-MIB (InetAddressType, InetAddress)

The INET-ADDRESS-MIB MIB module RFC3291 defines the textual conventions InetAddressType and InetAddress to represent Internet network layer endpoints. Some MIB modules use these textual conventions in conjunction with the InetPortNumber textual convention to represent Internet transport-layer endpoints. This approach is fine as long as a MIB models protocols or applications that are specific to the Internet suite of transport protocols. For protocols or applications that can potentially use other transport protocols, the use of the definitions contained in this memo is more appropriate.

Definitions

TRANSPORT-ADDRESS-MIB DEFINITIONS ::= BEGIN

IMPORTS

MODULE-IDENTITY, OBJECT-IDENTITY, mib-2     FROM SNMPv2-SMI
TEXTUAL-CONVENTION                          FROM SNMPv2-TC;

transportAddressMIB MODULE-IDENTITY

LAST-UPDATED "200211010000Z"
ORGANIZATION
    "IETF Operations and Management Area"
CONTACT-INFO
    "Juergen Schoenwaelder (Editor)
     TU Braunschweig
     Bueltenweg 74/75
     38106 Braunschweig, Germany
     Phone: +49 531 391-3289
     EMail: [email protected]
     Send comments to <[email protected]>."
DESCRIPTION
    "This MIB module provides commonly used transport
     address definitions.
     Copyright (C) The Internet Society (2002). This version of
     this MIB module is part of RFC 3419; see the RFC itself for
     full legal notices."
-- Revision log
REVISION    "200211010000Z"
DESCRIPTION
    "Initial version, published as RFC 3419."
::= { mib-2 100 }

transportDomains OBJECT IDENTIFIER ::= { transportAddressMIB 1 }

transportDomainUdpIpv4 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The UDP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4 for
     global IPv4 addresses."
::= { transportDomains 1 }

transportDomainUdpIpv6 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The UDP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6 for
     global IPv6 addresses."
::= { transportDomains 2 }

transportDomainUdpIpv4z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The UDP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4z for
     scoped IPv4 addresses with a zone index."
::= { transportDomains 3 }

transportDomainUdpIpv6z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The UDP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6z for
     scoped IPv6 addresses with a zone index."
::= { transportDomains 4 }

transportDomainTcpIpv4 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The TCP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4 for
     global IPv4 addresses."
::= { transportDomains 5 }

transportDomainTcpIpv6 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The TCP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6 for
     global IPv6 addresses."
::= { transportDomains 6 }

transportDomainTcpIpv4z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The TCP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4z for
     scoped IPv4 addresses with a zone index."
::= { transportDomains 7 }

transportDomainTcpIpv6z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The TCP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6z for
     scoped IPv6 addresses with a zone index."
::= { transportDomains 8 }

transportDomainSctpIpv4 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The SCTP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4 for
     global IPv4 addresses. This transport domain usually
     represents the primary address on multihomed SCTP
     endpoints."
::= { transportDomains 9 }

transportDomainSctpIpv6 OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The SCTP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6 for
     global IPv6 addresses. This transport domain usually
     represents the primary address on multihomed SCTP
     endpoints."
::= { transportDomains 10 }

transportDomainSctpIpv4z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The SCTP over IPv4 transport domain.  The corresponding
     transport address is of type TransportAddressIPv4z for
     scoped IPv4 addresses with a zone index. This transport
     domain usually represents the primary address on
     multihomed SCTP endpoints."
::= { transportDomains 11 }

transportDomainSctpIpv6z OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The SCTP over IPv6 transport domain.  The corresponding
     transport address is of type TransportAddressIPv6z for
     scoped IPv6 addresses with a zone index. This transport
     domain usually represents the primary address on
     multihomed SCTP endpoints."
::= { transportDomains 12 }

transportDomainLocal OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The Posix Local IPC transport domain. The corresponding
     transport address is of type TransportAddressLocal.
     The Posix Local IPC transport domain incorporates the
     well-known UNIX domain sockets."
::= { transportDomains 13 }

transportDomainUdpDns OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The UDP transport domain using fully qualified domain
     names. The corresponding transport address is of type
     TransportAddressDns."
::= { transportDomains 14 }

transportDomainTcpDns OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The TCP transport domain using fully qualified domain
     names. The corresponding transport address is of type
     TransportAddressDns."
::= { transportDomains 15 }

transportDomainSctpDns OBJECT-IDENTITY

STATUS      current
DESCRIPTION
    "The SCTP transport domain using fully qualified domain
     names. The corresponding transport address is of type
     TransportAddressDns."
::= { transportDomains 16 }

TransportDomain ::= TEXTUAL-CONVENTION

STATUS      current
DESCRIPTION
    "A value that represents a transport domain.
     Some possible values, such as transportDomainUdpIpv4, are
     defined in this module.  Other possible values can be
     defined in other MIB modules."
SYNTAX      OBJECT IDENTIFIER

-- -- The enumerated values of the textual convention below should -- be identical to the last sub-identifier of the OID registered -- for the same domain. --

TransportAddressType ::= TEXTUAL-CONVENTION

STATUS      current
DESCRIPTION
    "A value that represents a transport domain. This is the
     enumerated version of the transport domain registrations
     in this MIB module. The enumerated values have the
     following meaning:
     unknown(0)     unknown transport address type
     udpIpv4(1)     transportDomainUdpIpv4
     udpIpv6(2)     transportDomainUdpIpv6
     udpIpv4z(3)    transportDomainUdpIpv4z
     udpIpv6z(4)    transportDomainUdpIpv6z
     tcpIpv4(5)     transportDomainTcpIpv4
     tcpIpv6(6)     transportDomainTcpIpv6
     tcpIpv4z(7)    transportDomainTcpIpv4z
     tcpIpv6z(8)    transportDomainTcpIpv6z
     sctpIpv4(9)    transportDomainSctpIpv4
     sctpIpv6(10)   transportDomainSctpIpv6
     sctpIpv4z(11)  transportDomainSctpIpv4z
     sctpIpv6z(12)  transportDomainSctpIpv6z
     local(13)      transportDomainLocal
     udpDns(14)     transportDomainUdpDns
     tcpDns(15)     transportDomainTcpDns
     sctpDns(16)    transportDomainSctpDns
     This textual convention can be used to represent transport
     domains in situations where a syntax of TransportDomain is
     unwieldy (for example, when used as an index).
     The usage of this textual convention implies that additional
     transport domains can only be supported by updating this MIB
     module. This extensibility restriction does not apply for the
     TransportDomain textual convention which allows MIB authors
     to define additional transport domains independently in
     other MIB modules."
SYNTAX      INTEGER {
                unknown(0),
                udpIpv4(1),
                udpIpv6(2),
                udpIpv4z(3),
                udpIpv6z(4),
                tcpIpv4(5),
                tcpIpv6(6),
                tcpIpv4z(7),
                tcpIpv6z(8),
                sctpIpv4(9),
                sctpIpv6(10),
                sctpIpv4z(11),
                sctpIpv6z(12),
                local(13),
                udpDns(14),
                tcpDns(15),
                sctpDns(16)
            }

TransportAddress ::= TEXTUAL-CONVENTION

STATUS      current
DESCRIPTION
    "Denotes a generic transport address.
     A TransportAddress value is always interpreted within the
     context of a TransportAddressType or TransportDomain value.
     Every usage of the TransportAddress textual convention MUST
     specify the TransportAddressType or TransportDomain object
     which provides the context. Furthermore, MIB authors SHOULD
     define a separate TransportAddressType or TransportDomain
     object for each TransportAddress object. It is suggested that
     the TransportAddressType or TransportDomain is logically
     registered before the object(s) which use the
     TransportAddress textual convention if they appear in the
     same logical row.
     The value of a TransportAddress object must always be
     consistent with the value of the associated
     TransportAddressType or TransportDomain object. Attempts
     to set a TransportAddress object to a value which is
     inconsistent with the associated TransportAddressType or
     TransportDomain must fail with an inconsistentValue error.
     When this textual convention is used as a syntax of an
     index object, there may be issues with the limit of 128
     sub-identifiers specified in SMIv2, STD 58. In this case,
     the OBJECT-TYPE declaration MUST include a 'SIZE' clause
     to limit the number of potential instance sub-identifiers."
SYNTAX      OCTET STRING (SIZE (0..255))

TransportAddressIPv4 ::= TEXTUAL-CONVENTION

DISPLAY-HINT "1d.1d.1d.1d:2d"
STATUS      current
DESCRIPTION
    "Represents a transport address consisting of an IPv4
     address and a port number (as used for example by UDP,
     TCP and SCTP):
      octets       contents         encoding
       1-4         IPv4 address     network-byte order
       5-6         port number      network-byte order
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair."
SYNTAX      OCTET STRING (SIZE (6))

TransportAddressIPv6 ::= TEXTUAL-CONVENTION

DISPLAY-HINT "0a[2x:2x:2x:2x:2x:2x:2x:2x]0a:2d"
STATUS      current
DESCRIPTION
    "Represents a transport address consisting of an IPv6
     address and a port number (as used for example by UDP,
     TCP and SCTP):
      octets       contents         encoding
       1-16        IPv6 address     network-byte order
      17-18        port number      network-byte order
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair."
SYNTAX      OCTET STRING (SIZE (18))

TransportAddressIPv4z ::= TEXTUAL-CONVENTION

DISPLAY-HINT "1d.1d.1d.1d%4d:2d"
STATUS      current
DESCRIPTION
    "Represents a transport address consisting of an IPv4
     address, a zone index and a port number (as used for
     example by UDP, TCP and SCTP):
      octets       contents         encoding
       1-4         IPv4 address     network-byte order
       5-8         zone index       network-byte order
       9-10        port number      network-byte order
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair."
SYNTAX      OCTET STRING (SIZE (10))

TransportAddressIPv6z ::= TEXTUAL-CONVENTION

DISPLAY-HINT "0a[2x:2x:2x:2x:2x:2x:2x:2x%4d]0a:2d"
STATUS      current
DESCRIPTION
    "Represents a transport address consisting of an IPv6
     address, a zone index and a port number (as used for
     example by UDP, TCP and SCTP):
      octets       contents         encoding
       1-16        IPv6 address     network-byte order
      17-20        zone index       network-byte order
      21-22        port number      network-byte order
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair."
SYNTAX      OCTET STRING (SIZE (22))

TransportAddressLocal ::= TEXTUAL-CONVENTION

DISPLAY-HINT "1a"
STATUS      current
DESCRIPTION
    "Represents a POSIX Local IPC transport address:
      octets       contents                   encoding
       all         POSIX Local IPC address    string
     The Posix Local IPC transport domain subsumes UNIX domain
     sockets.
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair.
     When this textual convention is used as a syntax of an
     index object, there may be issues with the limit of 128
     sub-identifiers specified in SMIv2, STD 58. In this case,
     the OBJECT-TYPE declaration MUST include a 'SIZE' clause
     to limit the number of potential instance sub-identifiers."
REFERENCE
    "Protocol Independent Interfaces (IEEE POSIX 1003.1g)"
SYNTAX      OCTET STRING (SIZE (1..255))

TransportAddressDns ::= TEXTUAL-CONVENTION

DISPLAY-HINT "1a"
STATUS      current
DESCRIPTION
    "Represents a DNS domain name followed by a colon ':'
     (ASCII character 0x3A) and a port number in ASCII.
     The name SHOULD be fully qualified whenever possible.
     Values of this textual convention are not directly useable as
     transport-layer addressing information, and require runtime
     resolution. As such, applications that write them must be
     prepared for handling errors if such values are not
     supported, or cannot be resolved (if resolution occurs at the
     time of the management operation).
     The DESCRIPTION clause of TransportAddress objects that may
     have TransportAddressDns values must fully describe how (and
     when) such names are to be resolved to IP addresses and vice
     versa.
     This textual convention SHOULD NOT be used directly in object
     definitions since it restricts addresses to a specific format.
     However, if it is used, it MAY be used either on its own or
     in conjunction with TransportAddressType or TransportDomain
     as a pair.
     When this textual convention is used as a syntax of an
     index object, there may be issues with the limit of 128
     sub-identifiers specified in SMIv2, STD 58. In this case,
     the OBJECT-TYPE declaration MUST include a 'SIZE' clause
     to limit the number of potential instance sub-identifiers."
SYNTAX      OCTET STRING (SIZE (1..255))

END

Examples

This section shows some examples how transport addresses are encoded and rendered using some of the transport address definitions.

Description: Unspecified IPv4 address on port 80. Encoding (hex): 000000000050 Display: 0.0.0.0:80

Description: Global IPv4 address on port 80. Encoding (hex): 86A922010050 Display: 134.169.34.1:80

Description: Unspecified IPv6 address on port 80. Encoding (hex): 000000000000000000000000000000000050 Display: [0:0:0:0:0:0:0:0]:80

Description: Global IPv6 address on port 80. Encoding (hex): 108000000000000000080800200C417A0050 Display: [1080:0:0:0:8:800:200C:417A]:80

Description: Link-local IPv6 address with zone-index 42 on port 80. Encoding (hex): FE8000000000000000010000000002000000002A0050 Display: [FE80:0:0:0:1:0:0:200%42]:80

Description: Posix Local IPC address (UNIX domain). Encoding (hex): 2F7661722F6167656E74782F6D6173746572 Display: /var/agentx/master

Description: Fully qualified domain name on port 80. Encoding (hex): 7777772E6578616D706C652E6E65743A3830 Display: www.example.net:80

Security Considerations

The MIB module contained in this memo does not define any management objects. Instead, it defines a set of textual conventions which may be used by other MIB modules to define management objects.

Meaningful security considerations can only be written for MIB modules that define concrete management objects. This document has therefore no impact on the security of the Internet.

Acknowledgments

This document was produced by the Operations and Management Area "IPv6MIB" design team. The authors would like to thank Mark Ellison, Brian Haberman, Mike Heard, Glenn Mansfield Keeni, Erik Nordmark, Shawn A. Routhier, Bill Strahm, Dave Thaler and Bert Wijnen for their comments and suggestions.

Intellectual Property Notice

The IETF takes no position regarding the validity or scope of any intellectual property or other rights that might be claimed to pertain to the implementation or use of the technology described in this document or the extent to which any license under such rights might or might not be available; neither does it represent that it has made any effort to identify any such rights. Information on the IETF's procedures with respect to rights in standards-track and standards-related documentation can be found in BCP-11. Copies of claims of rights made available for publication and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementors or users of this specification can be obtained from the IETF Secretariat.

The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights which may cover technology that may be required to practice this standard. Please address the information to the IETF Executive Director.

Normative References

RFC2119 Bradner, S., "Key words for use in RFCs to Indicate

         Requirement Levels", BCP 14, RFC 2119, March 1997.

RFC2578 McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,

         Rose, M. and S. Waldbusser, "Structure of Management
         Information Version 2 (SMIv2)", STD 58, RFC 2578, April
         1999.

RFC2579 McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,

         Rose, M. and S. Waldbusser, "Textual Conventions for
         SMIv2", STD 58, RFC 2579, April 1999.

RFC2580 McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,

         Rose, M. and S. Waldbusser, "Conformance Statements for
         SMIv2", STD 58, RFC 2580, April 1999.

RFC3417 Presuhn, R., Case, J., McCloghrie, K., Rose, M. and S.

         Waldbusser, "Transport Mappings for the Simple Network
         Management Protocol (SNMP)", STD 62, RFC 3417, December
         2002.

Informative References

[SCOPED] Deering, S., Haberman, B., Jinmei, T., Nordmark, E., Onoe,

         A. and B. Zill, "IPv6 Scoped Address Architecture", Work in
         Progress.

RFC2396 Berners-Lee, T., Fielding, R. and L. Masinter, "Uniform

         Resource Identifiers (URI): Generic Syntax", RFC 2396,
         August 1998.

RFC2732 Hinden, R., Carpenter, B. and L. Masinter, "Format for

         Literal IPv6 Addresses in URL's", RFC 2732, August 1998.

RFC3291 Daniele, M., Haberman, B., Routhier, S. and J.

         Schoenwaelder, "Textual Conventions for Internet Network
         Addresses", RFC 3291, December 2001.

RFC3410 Case, J., Mundy, R., Partain, D. and B. Stewart,

         "Introduction and Applicability Statements for Internet-
         Standard Management Framework", RFC 3410, December 2002.

Authors' Addresses

Mike Daniele Consultant 19 Pinewood Rd Hudson, NH 03051 USA

Phone: +1 603 883-6365 EMail: [email protected]

Juergen Schoenwaelder TU Braunschweig Bueltenweg 74/75 38106 Braunschweig Germany

Phone: +49 531 391-3289 EMail: [email protected]

Full Copyright Statement

Copyright (C) The Internet Society (2002). All Rights Reserved.

This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.

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Acknowledgement

Funding for the RFC Editor function is currently provided by the Internet Society.