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RFC 3599

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Request for Comments Summary RFC Numbers 3500-3599


Top       Page 1 
Network Working Group                                          S. Ginoza
Request for Comments: 3599                                           ISI
Category: Informational                                    December 2003

                      Request for Comments Summary

                         RFC Numbers 3500-3599

Status of This Memo

   This RFC is a slightly annotated list of the 100 RFCs from RFC 3500
   through RFC 3599.  This is a status report on these RFCs.  This memo
   provides information for the Internet community.  It does not specify
   an Internet standard of any kind.  Distribution of this memo is

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.


   Many RFCs, but not all, are Proposed Standards, Draft Standards, or
   Standards.  Since the status of these RFCs may change during the
   standards processing, we note here only that they are on the
   standards track.  Please see the latest edition of "Internet Official
   Protocol Standards" for the current state and status of these RFCs.
   In the following, RFCs on the standards track are marked [STANDARDS

RFC     Author          Date            Title
---     ------          ----            -----

3599    Ginoza                          Request for Comments Summary

This memo.

3598    Murchison       Sep 2003        Sieve Email Filtering --
                                        Subaddress Extension

On email systems that allow for "subaddressing" or "detailed addressing"
(e.g., ""), it is sometimes desirable to make
comparisons against these sub-parts of addresses.  This document defines
an extension to the Sieve mail filtering language that allows users to
compare against the user and detail parts of an address.  [STANDARDS

Top       Page 2 
3597    Gustafsson      Sep 2003        Handling of Unknown DNS
                                        Resource Record (RR) Types

Extending the Domain Name System (DNS) with new Resource Record (RR)
types currently requires changes to name server software.  This document
specifies the changes necessary to allow future DNS implementations to
handle new RR types transparently.  [STANDARDS TRACK]

3596    Thomson         Oct 2003        DNS Extensions to Support IP
                                        Version 6

This document defines the changes that need to be made to the Domain
Name System (DNS) to support hosts running IP version 6 (IPv6).  The
changes include a resource record type to store an IPv6 address, a
domain to support lookups based on an IPv6 address, and updated
definitions of existing query types that return Internet addresses as
part of additional section processing.  The extensions are designed to
be compatible with existing applications and, in particular, DNS
implementations themselves.  [STANDARDS TRACK]

3595    Wijnen          Sep 2003        Textual Conventions for IPv6
                                        Flow Label

This MIB module defines textual conventions to represent the commonly
used IPv6 Flow Label.  The intent is that these textual conventions
(TCs) will be imported and used in MIB modules that would otherwise
define their own representations.  [STANDARDS TRACK]

3594    Duffy           Sep 2003        PacketCable Security Ticket
                                        Control Sub-Option for the
                                        DHCP CableLabs Client
                                        Configuration (CCC) Option

This document defines a new sub-option for the DHCP CableLabs Client
Configuration (CCC) Option.  This new sub-option will be used to direct
CableLabs Client Devices (CCDs) to invalidate security tickets stored in
CCD non volatile memory (i.e., locally persisted security tickets).

Top       Page 3 
3593    Tesink, Ed.     Sep 2003        Textual Conventions for MIB
                                        Modules Using Performance
                                        History Based on 15 Minute

This document defines a set of Textual Conventions for MIB modules that
make use of performance history data based on 15 minute intervals.

This memo replaces RFC 2493.  Changes relative to RFC 2493 are
summarized in the MIB module's REVISION clause.  [STANDARDS TRACK]

3592    Tesink          Sep 2003        Definitions of Managed Objects
                                        for the Synchronous Optical
                                        Network/Synchronous Digital
                                        Hierarchy (SONET/SDH)
                                        Interface Type

This memo defines a portion of the Management Information Base (MIB) for
use with network management protocols in TCP/IP-based internets.  In
particular, it defines objects for managing Synchronous Optical
Network/Synchronous Digital Hierarchy (SONET/SDH) interfaces.  This
document is a companion to the documents that define Managed Objects for
the DS1/E1/DS2/E2 and DS3/E3 Interface Types.

This memo replaces RFC 2558.  Changes relative to RFC 2558 are
summarized in the MIB module's REVISION clause.  [STANDARDS TRACK]

3591    Lam             Sep 2003        Definitions of Managed Objects
                                        for the Optical Interface Type

This memo defines a portion of the Management Information Base (MIB) for
use with Simple Network Management Protocol (SNMP) in TCP/IP-based
internets.  In particular, it defines objects for managing Optical
Interfaces associated with WavelengthDivision Multiplexing systems or
characterized by the Optical Transport Network (OTN) in accordance with
the OTN architecture defined in ITU-T Recommendation G.872.

The MIB module defined in this memo can be used for performance
monitoring and/or configuration of such optical interface.  [STANDARDS

Top       Page 4 
3590    Haberman        Sep 2003        Source Address Selection for
                                        the Multicast Listener
                                        Discovery (MLD) Protocol

It has come to light that there is an issue with the selection of a
suitable IPv6 source address for Multicast Listener Discovery (MLD)
messages when a node is performing stateless address autoconfiguration.
This document is intended to clarify the rules on selecting an IPv6
address to use for MLD messages.  [STANDARDS TRACK]

3589    Loughney        Sep 2003        Diameter Command Codes for
                                        Third Generation Partnership
                                        Project (3GPP) Release 5

This document describes the IANA's allocation of a block of Diameter
Command Codes for the Third Generation Partnership Project (3GPP)
Release 5.  This document does not pass judgment on the usage of these
command codes.  Further more, these command codes are for use for
Release 5.  For future releases, these codes cannot be reused, but must
be allocated according to the Diameter Base specification.  This memo
provides information for the Internet community.

3588    Calhoun         Sep 2003        Diameter Base Protocol

The Diameter base protocol is intended to provide an Authentication,
Authorization and Accounting (AAA) framework for applications such as
network access or IP mobility.  Diameter is also intended to work in
both local Authentication, Authorization & Accounting and roaming
situations.  This document specifies the message format, transport,
error reporting, accounting and security services to be used by all
Diameter applications.  The Diameter base application needs to be
supported by all Diameter implementations.  [STANDARDS TRACK]

3587    Hinden          Aug 2003        IPv6 Global Unicast Address

This document obsoletes RFC 2374, "An IPv6 Aggregatable Global Unicast
Address Format".  It defined an IPv6 address allocation structure that
includes Top Level Aggregator (TLA) and Next Level Aggregator (NLA).
This document makes RFC 2374 and the TLA/NLA structure historic.  This
memo provides information for the Internet community.

Top       Page 5 
3586    Blaze           Aug 2003        IP Security Policy (IPSP)

This document describes the problem space and solution requirements for
developing an IP Security Policy (IPSP) configuration and management
framework.  The IPSP architecture provides a scalable, decentralized
framework for managing, discovering and negotiating the host and network
security policies that govern access, authorization, authentication,
confidentiality, data integrity, and other IP Security properties.  This
document highlights such architectural components and presents their
functional requirements.  [STANDARDS TRACK]

3585    Jason           Aug 2003        IPsec Configuration Policy
                                        Information Model

This document presents an object-oriented information model of IP
Security (IPsec) policy designed to facilitate agreement about the
content and semantics of IPsec policy, and enable derivations of task-
specific representations of IPsec policy such as storage schema,
distribution representations, and policy specification languages used to
configure IPsec-enabled endpoints.  The information model described in
this document models the configuration parameters defined by IPSec.  The
information model also covers the parameters found by the Internet Key
Exchange protocol (IKE).  Other key exchange protocols could easily be
added to the information model by a simple extension.  Further
extensions can further be added easily due to the object-oriented nature
of the model.

This information model is based upon the core policy classes as defined
in the Policy Core Information Model (PCIM) and in the Policy Core
Information Model Extensions (PCIMe).  [STANDARDS TRACK]

3584    Frye            Aug 2003        Coexistence between Version 1,
                                        Version 2, and Version 3 of
                                        the Internet-standard Network
                                        Management Framework

The purpose of this document is to describe coexistence between version
3 of the Internet-standard Network Management Framework, (SNMPv3),
version 2 of the Internet-standard Network Management Framework
(SNMPv2), and the original Internet-standard Network Management
Framework (SNMPv1).  This document also describes how to convert MIB
modules from SMIv1 format to SMIv2 format.  This document obsoletes RFC
2576.  This document specifies an Internet Best Current Practices for
the Internet Community, and requests discussion and suggestions for

Top       Page 6 
3583    Chaskar, Ed.    Sep 2003        Requirements of a Quality of
                                        Service (QoS) Solution for
                                        Mobile IP

Mobile IP ensures correct routing of packets to a mobile node as the
mobile node changes its point of attachment to the Internet.  However,
it is also required to provide proper Quality of Service (QoS)
forwarding treatment to the mobile node's packet stream at the
intermediate nodes in the network, so that QoS-sensitive IP services can
be supported over Mobile IP.  This document describes requirements for
an IP QoS mechanism for its satisfactory operation with Mobile IP.  This
memo provides information for the Internet community.

3582    Abley           Aug 2003        Goals for IPv6
                                        Site-Multihoming Architectures

This document outlines a set of goals for proposed new IPv6 site-
multihoming architectures.  It is recognised that this set of goals is
ambitious and that some goals may conflict with others.  The solution or
solutions adopted may only be able to satisfy some of the goals
presented here.  This memo provides information for the Internet

3581    Rosenberg       Aug 2003        An Extension to the Session
                                        Initiation Protocol (SIP) for
                                        Symmetric Response Routing

The Session Initiation Protocol (SIP) operates over UDP and TCP, among
others.  When used with UDP, responses to requests are returned to the
source address the request came from, and to the port written into the
topmost Via header field value of the request.  This behavior is not
desirable in many cases, most notably, when the client is behind a
Network Address Translator (NAT).  This extension defines a new
parameter for the Via header field, called "rport", that allows a client
to request that the server send the response back to the source IP
address and port from which the request originated.  [STANDARDS TRACK]

Top       Page 7 
3580    Congdon         Sep 2003        IEEE 802.1X Remote
                                        Authentication Dial In User
                                        Service (RADIUS) Usage

This document provides suggestions on Remote Authentication Dial In User
Service (RADIUS) usage by IEEE 802.1X Authenticators.  The material in
this document is also included within a non-normative Appendix within
the IEEE 802.1X specification, and is being presented as an IETF RFC for
informational purposes.  This memo provides information for the Internet

3579    Aboba           Sep 2003        RADIUS (Remote Authentication
                                        Dial In User Service)
                                        Support For Extensible
                                        Authentication Protocol (EAP)

This document defines Remote Authentication Dial In User Service
(RADIUS) support for the Extensible Authentication Protocol (EAP), an
authentication framework which supports multiple authentication
mechanisms.  In the proposed scheme, the Network Access Server (NAS)
forwards EAP packets to and from the RADIUS server, encapsulated within
EAP-Message attributes.  This has the advantage of allowing the NAS to
support any EAP authentication method, without the need for method-
specific code, which resides on the RADIUS server.  While EAP was
originally developed for use with PPP, it is now also in use with IEEE
802.  This memo provides information for the Internet community.

3578    Camarillo       Aug 2003        Mapping of Integrated Services
                                        Digital Network (ISDN) User
                                        Part (ISUP) Overlap Signalling
                                        to the Session Initiation
                                        Protocol (SIP)

This document describes a way to map Integrated Services Digital Network
User Part (ISUP) overlap signalling to Session Initiation Protocol
(SIP).  This mechanism might be implemented when using SIP in an
environment where part of the call involves interworking with the Public
Switched Telephone Network (PSTN).  [STANDARDS TRACK]

Top       Page 8 
3577    Waldbusser      Aug 2003        Introduction to the Remote
                                        Monitoring (RMON) Family of
                                        MIB Modules

The Remote Monitoring (RMON) Framework consists of a number of
interrelated documents.  This memo describes these documents and how
they relate to one another.  This memo provides information for the
Internet community.

3576    Chiba           Jul 2003        Dynamic Authorization
                                        Extensions to Remote
                                        Authentication Dial In User
                                        Service (RADIUS)

This document describes a currently deployed extension to the Remote
Authentication Dial In User Service (RADIUS) protocol, allowing dynamic
changes to a user session, as implemented by network access server
products.  This includes support for disconnecting users and changing
authorizations applicable to a user session.  This memo provides
information for the Internet community.

3575    Aboba           Jul 2003        IANA Considerations for RADIUS
                                        (Remote Authentication Dial In
                                        User Service)

This document describes the IANA considerations for the Remote
Authentication Dial In User Service (RADIUS).  [STANDARDS TRACK]

3574    Soininen, Ed.   Aug 2003        Transition Scenarios for 3GPP

This document describes different scenarios in Third Generation
Partnership Project (3GPP) defined packet network, i.e., General Packet
Radio Service (GPRS) that would need IP version 6 and IP version 4
transition.  The focus of this document is on the scenarios where the
User Equipment (UE) connects to nodes in other networks, e.g., in the
Internet.  GPRS network internal transition scenarios, i.e., between
different GPRS elements in the network, are out of scope.   The purpose
of the document is to list the scenarios for further discussion and
study.  This memo provides information for the Internet community.

Top       Page 9 
3573    Goyret          Jul 2003        Signaling of Modem-On-Hold
                                        status in Layer 2 Tunneling
                                        Protocol (L2TP)

The Layer 2 Tunneling Protocol (L2TP) defines a mechanism for tunneling
Point-to-Point Protocol (PPP) sessions.  It is common for these PPP
sessions to be established using modems connected over the public
switched telephone network.

One of the standards governing modem operation defines procedures that
enable a client modem to put the call on hold and later, re-establish
the modem link with minimal delay and without having to redial.  While
the modem call is on hold, the client phone line can be used to place or
receive other calls.

The L2TP base protocol does not provide any means to signal these events
from the L2TP Access Controller (LAC), where the modem is physically
connected, to the L2TP Network Server (LNS), where the PPP session is

This document describes a method to let the LNS know when a client modem
connected to a LAC has placed the call on hold.  [STANDARDS TRACK]

3572    Ogura           Jul 2003        Internet Protocol Version 6
                                        over MAPOS (Multiple Access
                                        Protocol Over SONET/SDH)

Multiple Access Protocol over SONET/SDH (MAPOS) is a high-speed link-
layer protocol that provides multiple access capability over a
Synchronous Optical NETwork/Synchronous Digital Hierarchy (SONET/SDH).

This document specifies the frame format for encapsulating an IPv6
datagram in a MAPOS frame.  It also specifies the method of forming IPv6
interface identifiers, the method of detecting duplicate addresses, and
the format of the Source/Target Link-layer Addresses option field used
in IPv6 Neighbor Discovery messages.  This memo provides information for
the Internet community.

3571    Rawlins         Aug 2003        Framework Policy Information
                                        Base for Usage Feedback

This document describes a portion of the Policy Information Base (PIB)
to control policy usage collection and reporting in a device.

Top       Page 10 
The provisioning classes specified here allow a Policy Decision Point
(PDP) to select which policy objects should collect usage information,
what information should be collected and when it should be reported.

This PIB requires the presence of other PIBs (defined elsewhere) that
provide the policy objects from which usage information is collected.
This memo provides information for the Internet community.

3570    Rzewski         Jul 2003        Content Internetworking (CDI)

In describing content internetworking as a technology targeted for use
in production networks, it is useful to provide examples of the sequence
of events that may occur when two content networks decide to
interconnect.  The scenarios presented here seek to provide some
concrete examples of what content internetworking is, and also to
provide a basis for evaluating content internetworking proposals.  This
memo provides information for the Internet community.

3569    Bhattacharyya   Jul 2003        An Overview of Source-Specific
                                        Multicast (SSM)

The purpose of this document is to provide an overview of
Source-Specific Multicast (SSM) and issues related to its deployment.
It discusses how the SSM service model addresses the challenges faced in
inter-domain multicast deployment, changes needed to routing protocols
and applications to deploy SSM and interoperability issues with current
multicast service models.  This memo provides information for the
Internet community.

3568    Barbir          Jul 2003        Known Content Network (CN)
                                        Request-Routing Mechanisms

This document presents a summary of Request-Routing techniques that are
used to direct client requests to surrogates based on various policies
and a possible set of metrics.  The document covers techniques that were
commonly used in the industry on or before December 2000.  In this memo,
the term Request-Routing represents techniques that is commonly called
content routing or content redirection.  In principle, Request-Routing
techniques can be classified under: DNS Request-Routing, Transport-layer
Request-Routing, and Application-layer Request-Routing.  This memo
provides information for the Internet community.

Top       Page 11 
3567    Li              Jul 2003        Intermediate System to
                                        Intermediate System (IS-IS)
                                        Cryptographic Authentication

This document describes the authentication of Intermediate System to
Intermediate System (IS-IS) Protocol Data Units (PDUs) using the Hashed
Message Authentication Codes - Message Digest 5 (HMAC-MD5) algorithm as
found in RFC 2104.  IS-IS is specified in International Standards
Organization (ISO) 10589, with extensions to support Internet Protocol
version 4 (IPv4) described in RFC 1195.  The base specification includes
an authentication mechanism that allows for multiple authentication
algorithms.  The base specification only specifies the algorithm for
cleartext passwords.

This document proposes an extension to that specification that allows
the use of the HMAC-MD5 authentication algorithm to be used in
conjunction with the existing authentication mechanisms.  This memo
provides information for the Internet community.

3566    Frankel         Sep 2003        The AES-XCBC-MAC-96 Algorithm
                                        and Its Use With IPsec

A Message Authentication Code (MAC) is a key-dependent one way hash
function.  One popular way to construct a MAC algorithm is to use a
block cipher in conjunction with the Cipher-Block-Chaining (CBC) mode of
operation.  The classic CBC-MAC algorithm, while secure for messages of
a pre-selected fixed length, has been shown to be insecure across
messages of varying lengths such as the type found in typical IP
datagrams.  This memo specifies the use of AES in CBC mode with a set of
extensions to overcome this limitation.  This new algorithm is named

3565    Schaad          Jul 2003        Use of the Advanced Encryption
                                        Standard (AES) Encryption
                                        Algorithm in Cryptographic
                                        Message Syntax (CMS)

This document specifies the conventions for using the Advanced
Encryption Standard (AES) algorithm for encryption with the
Cryptographic Message Syntax (CMS).  [STANDARDS TRACK]

Top       Page 12 
3564    Le Faucheur     Jul 2003        Requirements for Support of
                                        Differentiated Services-aware
                                        MPLS Traffic Engineering

This document presents Service Provider requirements for support of
Differentiated Services (Diff-Serv)-aware MPLS Traffic Engineering (DS-

Its objective is to provide guidance for the definition, selection and
specification of a technical solution addressing these requirements.
Specification for this solution itself is outside the scope of this

A problem statement is first provided.  Then, the document describes
example applications scenarios identified by Service Providers where
existing MPLS Traffic Engineering mechanisms fall short and
Diff-Serv-aware Traffic Engineering can address the needs.  The detailed
requirements that need to be addressed by the technical solution are
also reviewed.  Finally, the document identifies the evaluation criteria
that should be considered for selection and definition of the technical
solution.  This memo provides information for the Internet community.

3563    Zinin           Jul 2003        Cooperative Agreement Between
                                        the ISOC/IETF and ISO/IEC
                                        Joint Technical Committee
                                        1/Sub Committee 6 (JTC1/SC6)
                                        on IS-IS Routing Protocol

This document contains the text of the agreement signed between
ISOC/IETF and ISO/IEC JTC1/SC6 regarding cooperative development of the
IS-IS routing protocol.  The agreement includes definitions of the
related work scopes for the two organizations, request for creation and
maintenance of an IS-IS registry by IANA, as well as collaboration
guidelines.  This memo provides information for the Internet community.

3562    Leech           Jul 2003        Key Management Considerations
                                        for the TCP MD5 Signature

The TCP MD5 Signature Option (RFC 2385), used predominantly by BGP, has
seen significant deployment in critical areas of Internet
infrastructure.  The security of this option relies heavily on the
quality of the keying material used to compute the MD5 signature.  This
document addresses the security requirements of that keying material.
This memo provides information for the Internet community.

Top       Page 13 
3561    Perkins         Jul 2003        Ad hoc On-Demand Distance
                                        Vector (AODV) Routing

The Ad hoc On-Demand Distance Vector (AODV) routing protocol is intended
for use by mobile nodes in an ad hoc network.  It offers quick
adaptation to dynamic link conditions, low processing and memory
overhead, low network utilization, and determines unicast routes to
destinations within the ad hoc network.  It uses destination sequence
numbers to ensure loop freedom at all times (even in the face of
anomalous delivery of routing control messages), avoiding problems (such
as "counting to infinity") associated with classical distance vector
protocols.  This memo defines an Experimental Protocol for the Internet

3560    Housley         Jul 2003        Use of the RSAES-OAEP Key
                                        Transport Algorithm in
                                        the Cryptographic Message
                                        Syntax (CMS)

This document describes the conventions for using the RSAES-OAEP key
transport algorithm with the Cryptographic Message Syntax (CMS).  The
CMS specifies the enveloped-data content type, which consists of an
encrypted content and encrypted content-encryption keys for one or more
recipients.  The RSAES-OAEP key transport algorithm can be used to
encrypt content-encryption keys for intended recipients.  [STANDARDS

3559    Thaler          Jun 2003        Multicast Address Allocation

This memo defines a portion of the Management Information Base (MIB) for
use with network management protocols in the Internet community.  In
particular, it describes managed objects used for managing multicast
address allocation.  [STANDARDS TRACK]

Top       Page 14 
3558    Li              Jul 2003        RTP Payload Format for
                                        Enhanced Variable Rate Codecs
                                        (EVRC) and Selectable Mode
                                        Vocoders (SMV)

This document describes the RTP payload format for Enhanced Variable
Rate Codec (EVRC) Speech and Selectable Mode Vocoder (SMV) Speech.  Two
sub-formats are specified for different application scenarios.  A
bundled/interleaved format is included to reduce the effect of packet
loss on speech quality and amortize the overhead of the RTP header over
more than one speech frame.  A non-bundled format is also supported for
conversational applications.  [STANDARDS TRACK]

3557    Xie, Ed.        Jul 2003        RTP Payload Format for
                                        European Telecommunications
                                        Standards Institute (ETSI)
                                        European Standard ES 201 108
                                        Distributed Speech Recognition

This document specifies an RTP payload format for encapsulating European
Telecommunications Standards Institute (ETSI) European Standard (ES) 201
108 front-end signal processing feature streams for distributed speech
recognition (DSR) systems.  [STANDARDS TRACK]

3556    Casner          Jul 2003        Session Description Protocol
                                        (SDP) Bandwidth Modifiers
                                        for RTP Control Protocol
                                        (RTCP) Bandwidth

This document defines an extension to the Session Description Protocol
(SDP) to specify two additional modifiers for the bandwidth attribute.
These modifiers may be used to specify the bandwidth allowed for RTP
Control Protocol (RTCP) packets in a Real-time Transport Protocol (RTP)

Top       Page 15 
3555    Casner          Jul 2003        MIME Type Registration of RTP
                                        Payload Formats

This document defines the procedure to register RTP Payload Formats as
audio, video or other MIME subtype names.  This is useful in a text-
based format or control protocol to identify the type of an RTP
transmission.  This document also registers all the RTP payload formats
defined in the RTP Profile for Audio and Video Conferences as MIME
subtypes.  Some of these may also be used for transfer modes other than

3554    Bellovin        Jul 2003        On the Use of Stream Control
                                        Transmission Protocol (SCTP)
                                        with IPsec

This document describes functional requirements for IPsec (RFC 2401) and
Internet Key Exchange (IKE) (RFC 2409) to facilitate their use in
securing SCTP (RFC 2960) traffic.  [STANDARDS TRACK]

3553    Mealling        Jun 2003        An IETF URN Sub-namespace for
                                        Registered Protocol Parameters

This document describes a new sub-delegation for the 'ietf' URN
namespace for registered protocol items.  The 'ietf' URN namespace is
defined in RFC 2648 as a root for persistent URIs that refer to IETF-
defined resources.  This document specifies an Internet Best Current
Practices for the Internet Community, and requests discussion and
suggestions for improvements.

3552    Rescorla        Jul 2003        Guidelines for Writing RFC
                                        Text on Security

All RFCs are required to have a Security Considerations section.
Historically, such sections have been relatively weak.  This document
provides guidelines to RFC authors on how to write a good Security
Considerations section.   This document specifies an Internet Best
Current Practices for the Internet Community, and requests discussion
and suggestions for improvements.

Top       Page 16 
3551    Schulzrinne     Jul 2003        RTP Profile for Audio and
                                        Video Conferences with Minimal

This document describes a profile called "RTP/AVP" for the use of the
real-time transport protocol (RTP), version 2, and the associated
control protocol, RTCP, within audio and video multiparticipant
conferences with minimal control.  It provides interpretations of
generic fields within the RTP specification suitable for audio and video
conferences.  In particular, this document defines a set of default
mappings from payload type numbers to encodings.

This document also describes how audio and video data may be carried
within RTP.  It defines a set of standard encodings and their names when
used within RTP.  The descriptions provide pointers to reference
implementations and the detailed standards.  This document is meant as
an aid for implementors of audio, video and other real-time multimedia

This memorandum obsoletes RFC 1890.  It is mostly backwards-compatible
except for functions removed because two interoperable implementations
were not found.  The additions to RFC 1890 codify existing practice in
the use of payload formats under this profile and include new payload
formats defined since RFC 1890 was published.  [STANDARDS TRACK]

3550    Schulzrinne     Jul 2003        RTP: A Transport Protocol for
                                        Real-Time Applications

This memorandum describes RTP, the real-time transport protocol.  RTP
provides end-to-end network transport functions suitable for
applications transmitting real-time data, such as audio, video or
simulation data, over multicast or unicast network services.  RTP does
not address resource reservation and does not guarantee quality-of-
service for real-time services.  The data transport is augmented by a
control protocol (RTCP) to allow monitoring of the data delivery in a
manner scalable to large multicast networks, and to provide minimal
control and identification functionality.  RTP and RTCP are designed to
be independent of the underlying transport and network layers.  The
protocol supports the use of RTP-level translators and mixers.

Most of the text in this memorandum is identical to RFC 1889 which it
obsoletes.  There are no changes in the packet formats on the wire, only
changes to the rules and algorithms governing how the protocol is used.
The biggest change is an enhancement to the scalable timer algorithm for
calculating when to send RTCP packets in order to minimize transmission
in excess of the intended rate when many participants join a session
simultaneously.  [STANDARDS TRACK]

Top       Page 17 
3549    Salim           Jul 2003        Linux Netlink as an IP
                                        Services Protocol

This document describes Linux Netlink, which is used in Linux both as an
intra-kernel messaging system as well as between kernel and user space.
The focus of this document is to describe Netlink's functionality as a
protocol between a Forwarding Engine Component (FEC) and a Control Plane
Component (CPC), the two components that define an IP service.  As a
result of this focus, this document ignores other uses of Netlink,
including its use as a intra-kernel messaging system, as an inter-
process communication scheme (IPC), or as a configuration tool for other
non-networking or non-IP network services (such as decnet, etc.).

This document is intended as informational in the context of prior art
for the ForCES IETF working group.  This memo provides information for
the Internet community.

3548    Josefsson       Jul 2003        The Base16, Base32, and Base64
                                        Data Encodings

This document describes the commonly used base 64, base 32, and base 16
encoding schemes.  It also discusses the use of line-feeds in encoded
data, use of padding in encoded data, use of non-alphabet characters in
encoded data, and use of different encoding alphabets.  This memo
provides information for the Internet community.

3547    Baugher         Jul 2003        The Group Domain of

This document presents an ISAMKP Domain of Interpretation (DOI) for
group key management to support secure group communications.  The GDOI
manages group security associations, which are used by IPSEC and
potentially other data security protocols running at the IP or
application layers.  These security associations protect one or more
key-encrypting keys, traffic-encrypting keys, or data shared by group

Top       Page 18 
3546    Blake-Wilson    Jun 2003        Transport Layer Security (TLS)

This document describes extensions that may be used to add functionality
to Transport Layer Security (TLS).  It provides both generic extension
mechanisms for the TLS handshake client and server hellos, and specific
extensions using these generic mechanisms.

The extensions may be used by TLS clients and servers.  The extensions
are backwards compatible - communication is possible between TLS 1.0
clients that support the extensions and TLS 1.0 servers that do not
support the extensions, and vice versa.  [STANDARDS TRACK]

3545    Koren           Jul 2003        Enhanced Compressed RTP (CRTP)
                                        for Links with High Delay,
                                        Packet Loss and Reordering

This document describes a header compression scheme for point to point
links with packet loss and long delays.  It is based on Compressed
Real-time Transport Protocol (CRTP), the IP/UDP/RTP header compression
described in RFC 2508.  CRTP does not perform well on such links: packet
loss results in context corruption and due to the long delay, many more
packets are discarded before the context is repaired.  To correct the
behavior of CRTP over such links, a few extensions to the protocol are
specified here.  The extensions aim to reduce context corruption by
changing the way the compressor updates the context at the decompressor:
updates are repeated and include updates to full and differential
context parameters.  With these extensions, CRTP performs well over
links with packet loss, packet reordering and long delays.  [STANDARDS

3544    Koren           Jul 2003        IP Header Compression over PPP

This document describes an option for negotiating the use of header
compression on IP datagrams transmitted over the Point-to-Point Protocol
(RFC 1661).  It defines extensions to the PPP Control Protocols for IPv4
and IPv6 (RFC 1332, RFC 2472).  Header compression may be applied to
IPv4 and IPv6 datagrams in combination with TCP, UDP and RTP transport
protocols as specified in RFC 2507, RFC 2508 and RFC 3545.  [STANDARDS

Top       Page 19 
3543    Glass           Aug 2003        Registration Revocation in
                                        Mobile IPv4

This document defines a Mobile IPv4 Registration Revocation mechanism
whereby a mobility agent involved in providing Mobile IP services to a
mobile node can notify the other mobility agent providing Mobile IP
services to the same mobile node of the termination of this
registration.  The mechanism is also usable by a home agent to notify a
co-located mobile node of the termination of its binding as well.
Moreover, the mechanism provides for this notification to be
acknowledged.  A signaling mechanism already defined by the Mobile IPv4
protocol is leveraged as a way to inform a mobile node of the revocation
of its binding.  [STANDARDS TRACK]

3542    Stevens         May 2003        Advanced Sockets Application
                                        Program Interface (API) for

This document provides sockets Application Program Interface (API) to
support "advanced" IPv6 applications, as a supplement to a separate
specification, RFC 3493.  The expected applications include Ping,
Traceroute, routing daemons and the like, which typically use raw
sockets to access IPv6 or ICMPv6 header fields.  This document proposes
some portable interfaces for applications that use raw sockets under
IPv6.  There are other features of IPv6 that some applications will need
to access: interface identification (specifying the outgoing interface
and determining the incoming interface), IPv6 extension headers, and
path Maximum Transmission Unit (MTU) information.  This document
provides API access to these features too.  Additionally, some extended
interfaces to libraries for the "r" commands are defined.  The extension
will provide better backward compatibility to existing implementations
that are not IPv6-capable.  This memo provides information for the
Internet community.

3541    Walsh           May 2003        A Uniform Resource Name (URN)
                                        Namespace for the Web3D
                                        Consortium (Web3D)

This document describes a Uniform Resource Name (URN) namespace for the
Web3D Consortium (Web3D) for naming persistent resources such as
technical documents and specifications, Virtual Reality Modeling
Language (VRML) and Extensible 3D (X3D) files and resources, Extensible
Markup Language (XML) Document Type Definitions (DTDs), XML Schemas,
namespaces, style sheets, media assets, and other resources produced or
managed by Web3D.  This memo provides information for the Internet

Top       Page 20 
3540    Spring          Jun 2003        Robust Explicit Congestion
                                        Notification (ECN)
                                        Signaling with Nonces

This note describes the Explicit Congestion Notification (ECN)-nonce, an
optional addition to ECN that protects against accidental or malicious
concealment of marked packets from the TCP sender.  It improves the
robustness of congestion control by preventing receivers from exploiting
ECN to gain an unfair share of network bandwidth.  The ECN-nonce uses
the two ECN-Capable Transport (ECT)codepoints in the ECN field of the IP
header, and requires a flag in the TCP header.  It is computationally
efficient for both routers and hosts.  This memo defines an Experimental
Protocol for the Internet community.

3539    Aboba           Jun 2003        Authentication, Authorization
                                        and Accounting (AAA) Transport

This document discusses transport issues that arise within protocols for
Authentication, Authorization and Accounting (AAA).  It also provides
recommendations on the use of transport by AAA protocols.  This includes
usage of standards-track RFCs as well as experimental proposals.

3538    Kawatsura       Jun 2003        Secure Electronic Transaction
                                        (SET) Supplement for the v1.0
                                        Internet Open Trading Protocol

This document describes detailed Input/Output parameters for the
Internet Open Trading Protocol (IOTP) Payment Application Programming
Interface (API).  It also describes procedures in the Payment Bridge for
the use of SET (SET Secure Electronic Transaction) as the payment
protocol within Version 1.0 of the IOTP.  This memo provides information
for the Internet community.

Top       Page 21 
3537    Schaad          May 2003        Wrapping a Hashed Message
                                        Authentication Code (HMAC) key
                                        with a Triple-Data Encryption
                                        Standard (DES) Key or an
                                        Advanced Encryption Standard
                                        (AES) Key

This document defines two methods for wrapping an HMAC (Hashed Message
Authentication Code) key.  The first method defined uses a Triple DES
(Data Encryption Standard) key to encrypt the HMAC key.  The second
method defined uses an AES (Advanced Encryption Standard) key to encrypt
the HMAC key.  One place that such an algorithm is used is for the
Authenticated Data type in CMS (Cryptographic Message Syntax).

3536    Hoffman         May 2003        Terminology Used in
                                        Internationalization in the

This document provides a glossary of terms used in the IETF when
discussing internationalization.  The purpose is to help frame
discussions of internationalization in the various areas of the IETF and
to help introduce the main concepts to IETF participants.  This memo
provides information for the Internet community.

3535    Schoenwaelder   May 2003        Overview of the 2002 IAB
                                        Network Management

This document provides an overview of a workshop held by the Internet
Architecture Board (IAB) on Network Management.  The workshop was hosted
by CNRI in Reston, VA, USA on June 4 thru June 6, 2002.  The goal of the
workshop was to continue the important dialog started between network
operators and protocol developers, and to guide the IETFs focus on
future work regarding network management.  This report summarizes the
discussions and lists the conclusions and recommendations to the
Internet Engineering Task Force (IETF) community.  This memo provides
information for the Internet community.

Top       Page 22 
3534    Walleij         May 2003        The application/ogg Media

The Ogg Bitstream Format aims at becoming a general, freely-available
standard for transporting multimedia content across computing platforms
and networks.  The intention of this document is to define the MIME
media type application/ogg to refer to this kind of content when
transported across the Internet.  It is the intention of the Ogg
Bitstream Format developers that it be usable without intellectual
property concerns.  [STANDARDS TRACK]

3533    Pfeiffer        May 2003        The Ogg Encapsulation
                                        Format Version 0
This document describes the Ogg bitstream format version 0, which is a
general, freely-available encapsulation format for media streams.  It is
able to encapsulate any kind and number of video and audio encoding
formats as well as other data streams in a single bitstream.  This memo
provides information for the Internet community.  This memo provides
information for the Internet community.

3532    Anderson        May 2003        Requirements for the Dynamic
                                        Partitioning of Switching

This document identifies a set of requirements for the mechanisms used
to dynamically reallocate the resources of a switching element (e.g., an
ATM switch) to its partitions.  These requirements are particularly
critical in the case of an operator creating a switch partition and then
leasing control of that partition to a third party.  This memo provides
information for the Internet community.

Top       Page 23 
3531    Blanchet        Apr 2003        A Flexible Method for Managing
                                        the Assignment of Bits of an
                                        IPv6 Address Block

This document proposes a method to manage the assignment of bits of an
IPv6 address block or range.  When an organisation needs to make an
address plan for its subnets or when an ISP needs to make an address
plan for its customers, this method enables the organisation to postpone
the final decision on the number of bits to partition in the address
space they have.  It does it by keeping the bits around the borders of
the partition to be free as long as possible.  This scheme is applicable
to any bits addressing scheme using bits with partitions in the space,
but its first intended use is for IPv6.  It is a generalization of RFC
1219 and can be used for IPv6 assignments.  This memo provides
information for the Internet community.

3530    Shepler         Apr 2003        Network File System (NFS)
                                        version 4 Protocol

The Network File System (NFS) version 4 is a distributed filesystem
protocol which owes heritage to NFS protocol version 2, RFC 1094, and
version 3, RFC 1813.  Unlike earlier versions, the NFS version 4
protocol supports traditional file access while integrating support for
file locking and the mount protocol.  In addition, support for strong
security (and its negotiation), compound operations, client caching, and
internationalization have been added.  Of course, attention has been
applied to making NFS version 4 operate well in an Internet environment.

This document replaces RFC 3010 as the definition of the NFS version 4
protocol.  [STANDARDS TRACK]

3529    Harold          Apr 2003        XML-RPC is an Extensible

Markup Language-Remote Procedure Calling protocol that works over the
Internet.  It defines an XML format for messages that are transfered
between clients and servers using HTTP.  An XML-RPC message encodes
either a procedure to be invoked by the server, along with the
parameters to use in the invocation, or the result of an invocation.
Procedure parameters and results can be scalars, numbers, strings,
dates, etc.; they can also be complex record and list structures.

This document specifies a how to use the Blocks Extensible Exchange
Protocol (BEEP) to transfer messages encoded in the XML-RPC format
between clients and servers.  This memo defines an Experimental Protocol
for the Internet community.

Top       Page 24 
3528    Zhao            Apr 2003        Mesh-enhanced Service Location
                                        Protocol (mSLP)

This document describes the Mesh-enhanced Service Location Protocol
(mSLP).  mSLP enhances the Service Location Protocol (SLP) with a
scope-based fully-meshed peering Directory Agent (DA) architecture.
Peer DAs exchange new service registrations in shared scopes via anti-
entropy and direct forwarding.  mSLP improves the reliability and
consistency of SLP DA services, and simplifies Service Agent (SA)
registrations in systems with multiple DAs.  mSLP is backward compatible
with SLPv2 and can be deployed incrementally.  This memo defines an
Experimental Protocol for the Internet community.

3527    Kinnear         Apr 2003        Link Selection sub-option
                                        for the Relay Agent
                                        Information Option for DHCPv4

This document describes the link selection sub-option of the relay-
agent-information option for the Dynamic Host Configuration Protocol
(DHCPv4).  The giaddr specifies an IP address which determines both a
subnet, and thereby a link on which a Dynamic Host Configuration
Protocol (DHCP) client resides as well as an IP address that can be used
to communicate with the relay agent.  The subnet-selection option allows
the functions of the giaddr to be split so that when one entity is
performing as a DHCP proxy, it can specify the subnet/link from which to
allocate an IP address, which is different from the IP address with
which it desires to communicate with the DHCP server.  Analogous
situations exist where the relay agent needs to specify the subnet/link
on which a DHCP client resides, which is different from an IP address
that can be used to communicate with the relay agent.  [STANDARDS TRACK]

3526    Kivinen         May 2003        More Modular Exponential
                                        (MODP) Diffie-Hellman groups
                                        for Internet Key Exchange

This document defines new Modular Exponential (MODP) Groups for the
Internet Key Exchange (IKE) protocol.  It documents the well known and
used 1536 bit group 5, and also defines new 2048, 3072, 4096, 6144, and
8192 bit Diffie-Hellman groups numbered starting at 14.  The selection
of the primes for theses groups follows the criteria established by
Richard Schroeppel.  [STANDARDS TRACK]

Top       Page 25 
3525    Groves          Jun 2003        Gateway Control Protocol
                                        Version 1

This document defines the protocol used between elements of a physically
decomposed multimedia gateway, i.e., a Media Gateway and a Media Gateway
Controller.  The protocol presented in this document meets the
requirements for a media gateway control protocol as presented in RFC

This document replaces RFC 3015.  It is the result of continued
cooperation between the IETF Megaco Working Group and ITU-T Study Group
16.  It incorporates the original text of RFC 3015, modified by
corrections and clarifications discussed on the Megaco
E-mail list and incorporated into the Study Group 16 Implementor's Guide
for Recommendation H.248.  The present version of this document
underwent  ITU-T Last Call as Recommendation H.248 Amendment 1.  Because
of ITU-T renumbering, it was published by the ITU-T as Recommendation
H.248.1 (03/2002), Gateway Control Protocol Version 1.

Users of this specification are advised to consult the H.248 Sub-series
Implementors' Guide at for
additional corrections and clarifications.  [STANDARDS TRACK]

3524    Camarillo       Apr 2003        Mapping of Media Streams to
                                        Resource Reservation Flows

This document defines an extension to the Session Description Protocol
(SDP) grouping framework.  It allows requesting a group of media streams
to be mapped into a single resource reservation flow.  The SDP syntax
needed is defined, as well as a new "semantics" attribute called Single
Reservation Flow (SRF).  [STANDARDS TRACK]

3523    Polk            Apr 2003        Internet Emergency
                                        Preparedness (IEPREP)
                                        Telephony Topology Terminology

This document defines the topology naming conventions that are to be
used in reference to Internet Emergency Preparedness (IEPREP) phone
calls.  These naming conventions should be used to focus the IEPREP
Working Group during discussions and when writing requirements, gap
analysis and other solutions documents.  This memo provides information
for the Internet community.

Top       Page 26 
3522    Ludwig          Apr 2003        The Eifel Detection Algorithm
                                        for TCP

The Eifel detection algorithm allows a TCP sender to detect a posteriori
whether it has entered loss recovery unnecessarily.  It requires that
the TCP Timestamps option defined in RFC 1323 be enabled for a
connection.  The Eifel detection algorithm makes use of the fact that
the TCP Timestamps option eliminates the retransmission ambiguity in
TCP.  Based on the timestamp of the first acceptable ACK that arrives
during loss recovery, it decides whether loss recovery was entered
unnecessarily.  The Eifel detection algorithm provides a basis for
future TCP enhancements.  This includes response algorithms to back out
of loss recovery by restoring a TCP sender's congestion control state.
This memo defines an Experimental Protocol for the Internet community.

3521    Hamer           Apr 2003        Framework for Session Set-up
                                        with Media Authorization

Establishing multimedia streams must take into account requirements for
end-to-end QoS, authorization of network resource usage and accurate
accounting for resources used.  During session set up, policies may be
enforced to ensure that the media streams being requested lie within the
bounds of the service profile established for the requesting host.
Similarly, when a host requests resources to provide a certain QoS for a
packet flow, policies may be enforced to ensure that the required
resources lie within the bounds of the resource profile established for
the requesting host.

To prevent fraud and to ensure accurate billing, this document describes
various scenarios and mechanisms that provide the linkage required to
verify that the resources being used to provide a requested QoS are in-
line with the media streams requested (and authorized) for the session.
This memo provides information for the Internet community.

Top       Page 27 
3520    Hamer           Apr 2003        Session Authorization Policy

This document describes the representation of a session authorization
policy element for supporting policy-based per-session authorization and
admission control.  The goal of session authorization is to allow the
exchange of information between network elements in order to authorize
the use of resources for a service and to co-ordinate actions between
the signaling and transport planes.  This document describes how a
process on a system authorizes the reservation of resources by a host
and then provides that host with a session authorization policy element
which can be inserted into a resource reservation protocol (e.g., the
Resource ReSerVation Protocol (RSVP) PATH message) to facilitate proper
and secure reservation of those resources within the network.  We
describe the encoding of session authorization information as a policy
element conforming to the format of a Policy Data object (RFC 2750) and
provide details relating to operations, processing rules and error
scenarios.  [STANDARDS TRACK]

3519    Levkowetz       May 2003        Mobile IP Traversal of Network
                                        Address Translation (NAT)

Mobile IP's datagram tunnelling is incompatible with Network Address
Translation (NAT).  This document presents extensions to the Mobile IP
protocol and a tunnelling method which permits mobile nodes using Mobile
IP to operate in private address networks which are separated from the
public internet by NAT devices.  The NAT traversal is based on using the
Mobile IP Home Agent UDP port for encapsulated data traffic.  [STANDARDS

3518    Higashiyama     Apr 2003        Point-to-Point Protocol (PPP)
                                        Bridging Control Protocol

The Point-to-Point Protocol (PPP) provides a standard method for
transporting multi-protocol datagrams over point-to-point links.  PPP
defines an extensible Link Control Protocol (LCP) and proposes a family
of Network Control Protocols (NCP) for establishing and configuring
different network-layer protocols.

This document defines the NCP for establishing and configuring Remote
Bridging for PPP links.

Top       Page 28 
This document obsoletes RFC 2878, which was based on the IEEE 802.1D-
1993 MAC Bridge.  This document extends that specification by improving
support for bridge control packets.  [STANDARDS TRACK]

3517    Blanton         Apr 2003        A Conservative Selective
                                        Acknowledgment (SACK)-based
                                        Loss Recovery Algorithm for

This document presents a conservative loss recovery algorithm for TCP
that is based on the use of the selective acknowledgment (SACK) TCP
option.  The algorithm presented in this document conforms to the spirit
of the current congestion control specification (RFC 2581), but allows
TCP senders to recover more effectively when multiple segments are lost
from a single flight of data.  [STANDARDS TRACK]

3516    Nerenberg       Apr 2003        IMAP4 Binary Content Extension

This memo defines the Binary extension to the Internet Message Access
Protocol (IMAP4).  It provides a mechanism for IMAP4 clients and servers
to exchange message body data without using a MIME content-transfer-
encoding.  [STANDARDS TRACK]

3515    Sparks          Apr 2003        The Session Initiation
                                        Protocol (SIP) Refer Method

This document defines the REFER method.  This Session Initiation
Protocol (SIP) extension requests that the recipient REFER to a resource
provided in the request.  It provides a mechanism allowing the party
sending the REFER to be notified of the outcome of the referenced
request.  This can be used to enable many applications, including call

In addition to the REFER method, this document defines the refer event
package and the Refer-To request header.  [STANDARDS TRACK]

3514    Bellovin        1 Apr 2003      The Security Flag in the IPv4

Firewalls, packet filters, intrusion detection systems, and the like
often have difficulty distinguishing between packets that have malicious
intent and those that are merely unusual.  We define a security flag in
the IPv4 header as a means of distinguishing the two cases.  This memo
provides information for the Internet community.

Top       Page 29 
3513    Hinden          Apr 2003        Internet Protocol Version 6
                                        (IPv6) Addressing Architecture

This specification defines the addressing architecture of the IP Version
6 (IPv6) protocol.  The document includes the IPv6 addressing model,
text representations of IPv6 addresses, definition of IPv6 unicast
addresses, anycast addresses, and multicast addresses, and an IPv6
node's required addresses.  [STANDARDS TRACK]

3512    MacFaden        Apr 2003        Configuring Networks and
                                        Devices with Simple Network
                                        Management Protocol (SNMP)

This document is written for readers interested in the Internet Standard
Management Framework and its protocol, the Simple Network Management
Protocol (SNMP).  In particular, it offers guidance in the effective use
of SNMP for configuration management.  This information is relevant to
vendors that build network elements, management application developers,
and those that acquire and deploy this technology in their networks.
This memo provides information for the Internet community.

3511    Hickman         Apr 2003        Benchmarking Methodology for
                                        Firewall Performance

This document discusses and defines a number of tests that may be used
to describe the performance characteristics of firewalls.  In addition
to defining the tests, this document also describes specific formats for
reporting the results of the tests.

This document is a product of the Benchmarking Methodology Working Group
(BMWG) of the Internet Engineering Task Force (IETF).  This memo
provides information for the Internet community.

3510    Herriot         Apr 2003        Internet Printing
                                        IPP URL Scheme

This memo defines the "ipp" URL (Uniform Resource Locator) scheme.  This
memo updates IPP/1.1: Encoding and Transport (RFC 2910), by expanding
and clarifying Section 5, "IPP URL Scheme", of RFC 2910.  An "ipp" URL
is used to specify the network location of a print service that supports
the IPP Protocol (RFC 2910), or of a network resource (for example, a
print job) managed by such a print service.  [STANDARDS TRACK]

Top       Page 30 
3509    Zinin           Apr 2003        Alternative Implementations of
                                        OSPF Area Border Routers

Open Shortest Path First (OSPF) is a link-state intra-domain routing
protocol used for routing in IP networks.  Though the definition of the
Area Border Router (ABR) in the OSPF specification does not require a
router with multiple attached areas to have a backbone connection, it is
actually necessary to provide successful routing to the inter-area and
external destinations.  If this requirement is not met, all traffic
destined for the areas not connected to such an ABR or out of the OSPF
domain, is dropped.  This document describes alternative ABR behaviors
implemented in Cisco and IBM routers.  This memo provides information
for the Internet community.

3508    Levin           Apr 2003        H.323 Uniform Resource Locator
                                        (URL) Scheme Registration

ITU-T Recommendation H.323 version 4 introduced an H.323-specific
Uniform Resource Locator (URL).  This document reproduces the H323-URL
definition found in H.323, and is published as an RFC for ease of access
and registration with the Internet Assigned Numbers Authority (IANA).
This memo provides information for the Internet community.

3507    Elson           Apr 2003        Internet Content Adaptation
                                        Protocol (ICAP)

ICAP, the Internet Content Adaption Protocol, is a protocol aimed at
providing simple object-based content vectoring for HTTP services.  ICAP
is, in essence, a lightweight protocol for executing a "remote procedure
call" on HTTP messages.  It allows ICAP clients to pass HTTP messages to
ICAP servers for some sort of transformation or other processing
("adaptation").  The server executes its transformation service on
messages and sends back responses to the client, usually with modified
messages.  Typically, the adapted messages are either HTTP requests or
HTTP responses.  This memo provides information for the Internet

Top       Page 31 
3506    Fujimura        Mar 2003        Requirements and Design for
                                        Voucher Trading System (VTS)

Crediting loyalty points and collecting digital coupons or gift
certificates are common functions in purchasing and trading
transactions.  These activities can be generalized using the concept of
a "voucher", which is a digital representation of the right to claim
goods or services.  This document presents a Voucher Trading System
(VTS) that circulates vouchers securely and its terminology; it lists
design principles and requirements for VTS and the Generic Voucher
Language (GVL), with which diverse types of vouchers can be described.
This memo provides information for the Internet community.

3505    Eastlake        Mar 2003        Electronic Commerce Modeling
                                        Language (ECML): Version 2

This document lists the design principles, scope, and requirements for
the Electronic Commerce Modeling Language (ECML) version 2
specification.  It includes requirements as they relate to Extensible
Markup Language (XML) syntax, data model, format, and payment
processing.  This memo provides information for the Internet community.

3504    Eastlake        Mar 2003        Internet Open Trading Protocol
                                        (IOTP) Version 1, Errata

Since the publication of the RFCs specifying Version 1.0 of the Internet
Open Trading Protocol (IOTP), some errors have been noted.  This
informational document lists these errors and provides corrections for
them.  This memo provides information for the Internet community.

3503    Melnikov        Mar 2003        Message Disposition
                                        Notification (MDN) profile for
                                        Internet Message Access
                                        Protocol (IMAP)

The Message Disposition Notification (MDN) facility defined in RFC 2298
provides a means by which a message can request that message processing
by the recipient be acknowledged as well as a format to be used for such
acknowledgements.  However, it doesn't describe how multiple Mail User
Agents (MUAs) should handle the generation of MDNs in an Internet
Message Access Protocol (IMAP4) environment.

Top       Page 32 
This document describes how to handle MDNs in such an environment and
provides guidelines for implementers of IMAP4 that want to add MDN
support to their products.  [STANDARDS TRACK]

3502    Crispin         Mar 2003        Internet Message Access
                                        Protocol (IMAP) - MULTIAPPEND

This document describes the multiappending extension to the Internet
Message Access Protocol (IMAP) (RFC 3501).  This extension provides
substantial performance improvements for IMAP clients which upload
multiple messages at a time to a mailbox on the server.

A server which supports this extension indicates this with a capability

3501    Crispin         Mar 2003        INTERNET MESSAGE ACCESS
                                        PROTOCOL - VERSION 4rev1

The Internet Message Access Protocol, Version 4rev1 (IMAP4rev1) allows a
client to access and manipulate electronic mail messages on a server.
IMAP4rev1 permits manipulation of mailboxes (remote message folders) in
a way that is functionally equivalent to local folders.  IMAP4rev1 also
provides the capability for an offline client to resynchronize with the

IMAP4rev1 includes operations for creating, deleting, and renaming
mailboxes, checking for new messages, permanently removing messages,
setting and clearing flags, RFC 2822 and RFC 2045 parsing, searching,
and selective fetching of message attributes, texts, and portions
thereof.  Messages in IMAP4rev1 are accessed by the use of numbers.
These numbers are either message sequence numbers or unique identifiers.

IMAP4rev1 supports a single server.  A mechanism for accessing
configuration information to support multiple IMAP4rev1 servers is
discussed in RFC 2244.

IMAP4rev1 does not specify a means of posting mail; this function is
handled by a mail transfer protocol such as RFC 2821.  [STANDARDS TRACK]

Top       Page 33 
3500                                    Never Issued

RFC 3500 was never issued.

Security Considerations

   Security issues are not discussed in this memo.

Author's Address

   Sandy Ginoza
   University of Southern California
   Information Sciences Institute
   4676 Admiralty Way
   Marina del Rey, CA 90292

   Phone:  (310) 822-1511

Top       Page 34 
Full Copyright Statement

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   or assist in its implementation may be prepared, copied, published
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   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
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   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an


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