RFC Abstracts

RFC4949 - Internet Security Glossary, Version 2
This Glossary provides definitions, abbreviations, and explanations of terminology for information system security. The 334 pages of entries offer recommendations to improve the comprehensibility of written material that is generated in the Internet Standards Process (RFC 2026). The recommendations follow the principles that such writing should (a) use the same term or definition whenever the same concept is mentioned; (b) use terms in their plainest, dictionary sense; (c) use terms that are already well-established in open publications; and (d) avoid terms that either favor a particular vendor or favor a particular technology or mechanism over other, competing techniques that already exist or could be developed. This memo provides information for the Internet community.
RFC4948 - Report from the IAB workshop on Unwanted Traffic March 9-10, 2006
This document reports the outcome of a workshop held by the Internet Architecture Board (IAB) on Unwanted Internet Traffic. The workshop was held on March 9-10, 2006 at USC/ISI in Marina del Rey, CA, USA. The primary goal of the workshop was to foster interchange between the operator, standards, and research communities on the topic of unwanted traffic, as manifested in, for example, Distributed Denial of Service (DDoS) attacks, spam, and phishing, to gain understandings on the ultimate sources of these unwanted traffic, and to assess their impact and the effectiveness of existing solutions. It was also a goal of the workshop to identify engineering and research topics that could be undertaken by the IAB, the IETF, the IRTF, and the network research and development community at large to develop effective countermeasures against the unwanted traffic. This memo provides information for the Internet community.
RFC4947 - Address Resolution Mechanisms for IP Datagrams over MPEG-2 Networks
This document describes the process of binding/associating IPv4/IPv6 addresses with MPEG-2 Transport Streams (TS). This procedure is known as Address Resolution (AR) or Neighbor Discovery (ND). Such address resolution complements the higher-layer resource discovery tools that are used to advertise IP sessions.
RFC4946 - Atom License Extension
This memo defines an extension to the Atom Syndication Format for describing licenses associated with Atom feeds and entries. This memo defines an Experimental Protocol for the Internet community.
RFC4945 - The Internet IP Security PKI Profile of IKEv1/ISAKMP, IKEv2, and PKIX
The Internet Key Exchange (IKE) and Public Key Infrastructure for X.509 (PKIX) certificate profile both provide frameworks that must be profiled for use in a given application. This document provides a profile of IKE and PKIX that defines the requirements for using PKI technology in the context of IKE/IPsec. The document complements protocol specifications such as IKEv1 and IKEv2, which assume the existence of public key certificates and related keying materials, but which do not address PKI issues explicitly. This document addresses those issues. The intended audience is implementers of PKI for IPsec. [STANDARDS-TRACK]
RFC4944 - Transmission of IPv6 Packets over IEEE 802.15.4 Networks
This document describes the frame format for transmission of IPv6 packets and the method of forming IPv6 link-local addresses and statelessly autoconfigured addresses on IEEE 802.15.4 networks. Additional specifications include a simple header compression scheme using shared context and provisions for packet delivery in IEEE 802.15.4 meshes. [STANDARDS-TRACK]
RFC4943 - IPv6 Neighbor Discovery On-Link Assumption Considered Harmful
This document describes the historical and background information behind the removal of the "on-link assumption" from the conceptual host sending algorithm defined in Neighbor Discovery for IP Version 6 (IPv6). According to the algorithm as originally described, when a host's default router list is empty, the host assumes that all destinations are on-link. This is particularly problematic with IPv6-capable nodes that do not have off-link IPv6 connectivity (e.g., no default router). This document describes how making this assumption causes problems and how these problems outweigh the benefits of this part of the conceptual sending algorithm. This memo provides information for the Internet community.
RFC4942 - IPv6 Transition/Co-existence Security Considerations
The transition from a pure IPv4 network to a network where IPv4 and IPv6 coexist brings a number of extra security considerations that need to be taken into account when deploying IPv6 and operating the dual-protocol network and the associated transition mechanisms. This document attempts to give an overview of the various issues grouped into three categories:
RFC4941 - Privacy Extensions for Stateless Address Autoconfiguration in IPv6
Nodes use IPv6 stateless address autoconfiguration to generate addresses using a combination of locally available information and information advertised by routers. Addresses are formed by combining network prefixes with an interface identifier. On an interface that contains an embedded IEEE Identifier, the interface identifier is typically derived from it. On other interface types, the interface identifier is generated through other means, for example, via random number generation. This document describes an extension to IPv6 stateless address autoconfiguration for interfaces whose interface identifier is derived from an IEEE identifier. Use of the extension causes nodes to generate global scope addresses from interface identifiers that change over time, even in cases where the interface contains an embedded IEEE identifier. Changing the interface identifier (and the global scope addresses generated from it) over time makes it more difficult for eavesdroppers and other information collectors to identify when different addresses used in different transactions actually correspond to the same node. [STANDARDS-TRACK]
RFC4940 - IANA Considerations for OSPF
This memo creates a number of OSPF registries and provides guidance to IANA for assignment of code points within these registries. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC4939 - Definitions of Managed Objects for iSNS (Internet Storage Name Service)
The iSNS (Internet Storage Name Service) protocol provides storage name service functionality on an IP network that is being used for iSCSI (Internet Small Computer System Interface) or iFCP (Internet Fibre Channel Protocol) storage. This document provides a mechanism to monitor multiple iSNS Servers, including information about registered objects in an iSNS Server. [STANDARDS-TRACK]
RFC4938 - PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics
This document extends the Point-to-Point over Ethernet (PPPoE) Protocol with a credit-based flow control mechanism and Link Quality Metric report. This optional extension should improve the performance of PPPoE over media with variable bandwidth and limited buffering, such as mobile radio links. This memo provides information for the Internet community.
RFC4937 - IANA Considerations for PPP over Ethernet (PPPoE)
This document describes the IANA considerations for the PPP over Ethernet (PPPoE) protocol. This memo provides information for the Internet community.
RFC4936 - Fibre Channel Zone Server MIB
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 for information related to a Fibre Channel Zone Server. [STANDARDS-TRACK]
RFC4935 - Fibre Channel Fabric Configuration Server MIB
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 for information related to the Fabric Configuration Server function of a Fibre Channel network. [STANDARDS-TRACK]
RFC4934 - Extensible Provisioning Protocol (EPP) Transport Over TCP
This document describes how an Extensible Provisioning Protocol (EPP) session is mapped onto a single Transmission Control Protocol (TCP) connection. This mapping requires use of the Transport Layer Security (TLS) protocol to protect information exchanged between an EPP client and an EPP server. This document obsoletes RFC 3734. [STANDARDS-TRACK]
RFC4933 - Extensible Provisioning Protocol (EPP) Contact Mapping
This document describes an Extensible Provisioning Protocol (EPP) mapping for the provisioning and management of individual or organizational social information identifiers (known as "contacts") stored in a shared central repository. Specified in Extensible Markup Language (XML), the mapping defines EPP command syntax and semantics as applied to contacts. This document obsoletes RFC 3733. [STANDARDS-TRACK]
RFC4932 - Extensible Provisioning Protocol (EPP) Host Mapping
This document describes an Extensible Provisioning Protocol (EPP) mapping for the provisioning and management of Internet host names stored in a shared central repository. Specified in XML, the mapping defines EPP command syntax and semantics as applied to host names. This document obsoletes RFC 3732. [STANDARDS-TRACK]
RFC4931 - Extensible Provisioning Protocol (EPP) Domain Name Mapping
This document describes an Extensible Provisioning Protocol (EPP) mapping for the provisioning and management of Internet domain names stored in a shared central repository. Specified in XML, the mapping defines EPP command syntax and semantics as applied to domain names. This document obsoletes RFC 3731. [STANDARDS-TRACK]
RFC4930 - Extensible Provisioning Protocol (EPP)
This document describes an application layer client-server protocol for the provisioning and management of objects stored in a shared central repository. Specified in XML, the protocol defines generic object management operations and an extensible framework that maps protocol operations to objects. This document includes a protocol specification, an object mapping template, and an XML media type registration. This document obsoletes RFC 3730. [STANDARDS-TRACK]
RFC4929 - Change Process for Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Protocols and Procedures
This document provides guidelines for applying or extending the MPLS or GMPLS ((G)MPLS) protocol suites and clarifies the IETF's (G)MPLS working groups' responsibility for the (G)MPLS protocols. This document is directed to multi-vendor fora and Standards Development Organizations (SDOs) to provide an understanding of (G)MPLS work in the IETF and documents the requisite use of IETF review procedures when considering (G)MPLS applications or protocol extensions in their work. This document does not modify IETF processes. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC4928 - Avoiding Equal Cost Multipath Treatment in MPLS Networks
This document describes the Equal Cost Multipath (ECMP) behavior of currently deployed MPLS networks. This document makes best practice recommendations for anyone defining an application to run over an MPLS network that wishes to avoid the reordering that can result from transmission of different packets from the same flow over multiple different equal cost paths. These recommendations rely on inspection of the IP version number field in packets. Despite the heuristic nature of the recommendations, they provide a relatively safe way to operate MPLS networks, even if future allocations of IP version numbers were made for some purpose. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC4927 - Path Computation Element Communication Protocol (PCECP) Specific Requirements for Inter-Area MPLS and GMPLS Traffic Engineering
For scalability purposes, a network may comprise multiple Interior Gateway Protocol (IGP) areas. An inter-area Traffic Engineered Label Switched Path (TE-LSP) is an LSP that transits through at least two IGP areas. In a multi-area network, topology visibility remains local to a given area, and a head-end Label Switching Router (LSR) cannot compute an inter-area shortest constrained path. One key application of the Path Computation Element (PCE)-based architecture is the computation of inter-area TE-LSP paths. The PCE Communication Protocol (PCECP) is used to communicate computation requests from Path Computation Clients (PCCs) to PCEs, and to return computed paths in responses. This document lists a detailed set of PCECP-specific requirements for support of inter-area TE-LSP path computation. It complements the generic requirements for a PCE Communication Protocol. This memo provides information for the Internet community.
RFC4926 - A URN Namespace for GEANT
This document describes a proposed URN (Uniform Resource Name) namespace that would be managed by DANTE, representing European Research and academic networks, for naming persistent resources defined by GEANT, the Consortium of European Academic and Research Networks, its projects, activities, working groups, and other designated subordinates. This memo provides information for the Internet community.
RFC4925 - Softwire Problem Statement
This document captures the problem statement for the Softwires Working Group, which is developing standards for the discovery, control, and encapsulation methods for connecting IPv4 networks across IPv6-only networks as well as IPv6 networks across IPv4-only networks. The standards will encourage multiple, inter-operable vendor implementations by identifying, and extending where necessary, existing standard protocols to resolve a selected set of "IPv4/IPv6" and "IPv6/IPv4" transition problems. This document describes the specific problems ("Hubs and Spokes" and "Mesh") that will be solved by the standards developed by the Softwires Working Group. Some requirements (and non-requirements) are also identified to better describe the specific problem scope. This memo provides information for the Internet community.
RFC4924 - Reflections on Internet Transparency
This document provides a review of previous IAB statements on Internet transparency, as well a discussion of new transparency issues. Far from having lessened in relevance, technical implications of intentionally or inadvertently impeding network transparency play a critical role in the Internet's ability to support innovation and global communication. This document provides some specific illustrations of those potential impacts. This memo provides information for the Internet community.
RFC4923 - Quality of Service (QoS) Signaling in a Nested Virtual Private Network
Some networks require communication between an interior and exterior portion of a Virtual Private Network (VPN) or through a concatenation of such networks resulting in a nested VPN, but have sensitivities about what information is communicated across the boundary, especially while providing quality of service to communications with different precedence. This note seeks to outline the issues and the nature of the proposed solutions based on the framework for Integrated Services operation over Diffserv networks as described in RFC 2998. This memo provides information for the Internet community.
RFC4920 - Crankback Signaling Extensions for MPLS and GMPLS RSVP-TE
In a distributed, constraint-based routing environment, the information used to compute a path may be out of date. This means that Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineered (TE) Label Switched Path (LSP) setup requests may be blocked by links or nodes without sufficient resources. Crankback is a scheme whereby setup failure information is returned from the point of failure to allow new setup attempts to be made avoiding the blocked resources. Crankback can also be applied to LSP recovery to indicate the location of the failed link or node.
RFC4919 - IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs): Overview, Assumptions, Problem Statement, and Goals
This document describes the assumptions, problem statement, and goals for transmitting IP over IEEE 802.15.4 networks. The set of goals enumerated in this document form an initial set only. This memo provides information for the Internet community.
RFC4918 - HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV)
Web Distributed Authoring and Versioning (WebDAV) consists of a set of methods, headers, and content-types ancillary to HTTP/1.1 for the management of resource properties, creation and management of resource collections, URL namespace manipulation, and resource locking (collision avoidance).
RFC4917 - Mobile IPv4 Message String Extension
This document specifies a new extension for use in Mobile IPv4. This extension can be added by the Home Agent and the Foreign Agent to Registration Reply messages. This extension carries a text string that is intended for the user of the Mobile Node. [STANDARDS-TRACK]
RFC4916 - Connected Identity in the Session Initiation Protocol (SIP)
This document provides a means for a Session Initiation Protocol (SIP) User Agent (UA) that receives a dialog-forming request to supply its identity to the peer UA by means of a request in the reverse direction, and for that identity to be signed by an Authentication Service. Because of retargeting of a dialog-forming request (changing the value of the Request-URI), the UA that receives it (the User Agent Server, UAS) can have a different identity from that in the To header field. The same mechanism can be used to indicate a change of identity during a dialog, e.g., because of some action in the Public Switched Telephone Network (PSTN) behind a gateway. This document normatively updates RFC 3261 (SIP). [STANDARDS-TRACK]
RFC4915 - Multi-Topology (MT) Routing in OSPF
This document describes an extension to Open Shortest Path First (OSPF) in order to define independent IP topologies called Multi- Topologies (MTs). The Multi-Topologies extension can be used for computing different paths for unicast traffic, multicast traffic, different classes of service based on flexible criteria, or an in- band network management topology.
RFC4914 - Abstract Syntax Notation X (ASN.X) Representation of Encoding Instructions for the XML Encoding Rules (XER)
Abstract Syntax Notation X (ASN.X) is an Extensible Markup Language (XML) representation for Abstract Syntax Notation One (ASN.1) specifications. This document specifies the ASN.X representation of encoding instructions for the XML Encoding Rules (XER). This memo defines an Experimental Protocol for the Internet community.
RFC4913 - Abstract Syntax Notation X (ASN.X) Representation of Encoding Instructions for the Generic String Encoding Rules (GSER)
Abstract Syntax Notation X (ASN.X) is an Extensible Markup Language (XML) representation for Abstract Syntax Notation One (ASN.1) specifications. This document specifies the ASN.X representation of encoding instructions for the Generic String Encoding Rules (GSER). This memo defines an Experimental Protocol for the Internet community.
RFC4912 - Abstract Syntax Notation X (ASN.X)
Abstract Syntax Notation X (ASN.X) is a semantically equivalent Extensible Markup Language (XML) representation for Abstract Syntax Notation One (ASN.1) specifications. ASN.X completely avoids the numerous ambiguities inherent in the ASN.1 language; therefore, specifications written in ASN.X are much easier to parse and manage than original ASN.1 specifications. ASN.X, together with the Robust XML Encoding Rules (RXER), constitutes a schema language for XML documents that offers, through other ASN.1 encoding rules, alternative compact binary encodings for XML instance documents. This memo defines an Experimental Protocol for the Internet community.
RFC4911 - Encoding Instructions for the Robust XML Encoding Rules (RXER)
This document defines encoding instructions that may be used in an Abstract Syntax Notation One (ASN.1) specification to alter how ASN.1 values are encoded by the Robust XML Encoding Rules (RXER) and Canonical Robust XML Encoding Rules (CRXER), for example, to encode a component of an ASN.1 value as an Extensible Markup Language (XML) attribute rather than as a child element. Some of these encoding instructions also affect how an ASN.1 specification is translated into an Abstract Syntax Notation X (ASN.X) specification. Encoding instructions that allow an ASN.1 specification to reference definitions in other XML schema languages are also defined. This memo defines an Experimental Protocol for the Internet community.
RFC4910 - Robust XML Encoding Rules (RXER) for Abstract Syntax Notation One (ASN.1)
This document defines a set of Abstract Syntax Notation One (ASN.1) encoding rules, called the Robust XML Encoding Rules or RXER, that produce an Extensible Markup Language (XML) representation for values of any given ASN.1 data type. Rules for producing a canonical RXER encoding are also defined. This memo defines an Experimental Protocol for the Internet community.
RFC4909 - Multimedia Internet KEYing (MIKEY) General Extension Payload for Open Mobile Alliance BCAST LTKM/STKM Transport
This document specifies a new Multimedia Internet KEYing (MIKEY) General Extension payload (RFC 3830) to transport the short-term key message (STKM) and long-term key message (LTKM) payloads defined in the Open Mobile Alliance's (OMA) Browser and Content (BAC) Broadcast (BCAST) group's Service and Content protection specification. This memo provides information for the Internet community.
RFC4908 - Multi-homing for small scale fixed network Using Mobile IP and NEMO
Multihoming technology improves the availability of host and network connectivity. Since the behaviors of fixed and mobile networks differ, distinct architectures for each have been discussed and proposed. This document proposes a common architecture for both mobile and fixed networking environments, using mobile IP (RFC 3775) and Network Mobility (NEMO; RFC 3963). The proposed architecture requires a modification of mobile IP and NEMO so that multiple Care-of Addresses (CoAs) can be used. In addition, multiple Home Agents (HAs) that are located in different places are required for redundancy. This memo defines an Experimental Protocol for the Internet community.
RFC4907 - Architectural Implications of Link Indications
A link indication represents information provided by the link layer to higher layers regarding the state of the link. This document describes the role of link indications within the Internet architecture. While the judicious use of link indications can provide performance benefits, inappropriate use can degrade both robustness and performance. This document summarizes current proposals, describes the architectural issues, and provides examples of appropriate and inappropriate uses of link indications. This memo provides information for the Internet community.
RFC4906 - Transport of Layer 2 Frames Over MPLS
This document describes methods for transporting the Protocol Data Units (PDUs) of layer 2 protocols such as Frame Relay, Asynchronous Transfer Mode (ATM) Adaption Layer 5 (AAL5), and Ethernet, and for providing a Synchronized Optical Network (SONET) circuit emulation service across an MPLS network. This document describes the so-called "draft-martini" protocol, which has since been superseded by the Pseudowire Emulation Edge to Edge Working Group specifications described in RFC 4447 and related documents. This memo defines a Historic Document for the Internet community.
RFC4905 - Encapsulation Methods for Transport of Layer 2 Frames over MPLS Networks
This document describes methods for encapsulating the Protocol Data Units (PDUs) of layer 2 protocols such as Frame Relay, Asynchronous Transfer Mode (ATM), or Ethernet for transport across an MPLS network. This document describes the so-called "draft-martini" protocol, which has since been superseded by the Pseudowire Emulation Edge to Edge Working Group specifications described in RFC 4447 and related documents. This memo defines a Historic Document for the Internet community.
RFC4904 - Representing Trunk Groups in tel/sip Uniform Resource Identifiers (URIs)
This document describes a standardized mechanism to convey trunk group parameters in sip and tel Uniform Resource Identifiers (URIs). An extension to the tel URI is defined for this purpose. [STANDARDS-TRACK]
RFC4903 - Multi-Link Subnet Issues
There have been several proposals around the notion that a subnet may span multiple links connected by routers. This memo documents the issues and potential problems that have been raised with such an approach. This memo provides information for the Internet community.
RFC4902 - Integrity, Privacy, and Security in Open Pluggable Edge Services (OPES) for SMTP
The Open Pluggable Edge Services (OPES) framework is application agnostic. Application-specific adaptations extend that framework. Previous work has focused on HTTP and work for SMTP is in progress. These protocols differ fundamentally in the way data flows, and it turns out that existing OPES requirements and IAB considerations for OPES need to be reviewed with regards to how well they fit for SMTP adaptation. This document analyzes aspects about the integrity of SMTP and mail message adaptation by OPES systems and about privacy and security issues when the OPES framework is adapted to SMTP. It also lists requirements that must be considered when creating the "SMTP adaptation with OPES" document.
RFC4901 - Protocol Extensions for Header Compression over MPLS
This specification defines how to use Multi-Protocol Label Switching (MPLS) to route Header-Compressed (HC) packets over an MPLS label switched path. HC can significantly reduce packet-header overhead and, in combination with MPLS, can also increases bandwidth efficiency and processing scalability in terms of the maximum number of simultaneous compressed flows that use HC at each router). Here we define how MPLS pseudowires are used to transport the HC context and control messages between the ingress and egress MPLS label switching routers. This is defined for a specific set of existing HC mechanisms that might be used, for example, to support voice over IP. This specification also describes extension mechanisms to allow support for future, as yet to be defined, HC protocols. In this specification, each HC protocol operates independently over a single pseudowire instance, very much as it would over a single point-to-point link. [STANDARDS-TRACK]
RFC4898 - TCP Extended Statistics MIB
This document describes extended performance statistics for TCP. They are designed to use TCP's ideal vantage point to diagnose performance problems in both the network and the application. If a network-based application is performing poorly, TCP can determine if the bottleneck is in the sender, the receiver, or the network itself. If the bottleneck is in the network, TCP can provide specific information about its nature. [STANDARDS-TRACK]
RFC4897 - Handling Normative References to Standards-Track Documents
The Internet Engineering Task Force (IETF) and Request for Comments (RFC) Editor have a long-standing rule that a document at a given maturity level cannot be published until all of the documents that it references as normative are at that maturity level or higher. This rule has sometimes resulted in very long publication delays for documents and some claims that it was a major obstruction to advancing documents in maturity level. The IETF agreed on a way to bypass this rule with RFC 3967. This document describes a simpler procedure for downward references to Standards-Track and Best Current Practice (BCP) documents, namely "note and move on". The procedure in RFC 3967 still applies for downward references to other classes of documents. In both cases, annotations should be added to such References. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC4896 - Signaling Compression (SigComp) Corrections and Clarifications
This document describes common misinterpretations and some ambiguities in the Signaling Compression Protocol (SigComp), and offers guidance to developers to resolve any resultant problems. SigComp defines a scheme for compressing messages generated by application protocols such as the Session Initiation Protocol (SIP). This document updates the following RFCs: RFC 3320, RFC 3321, and RFC 3485. [STANDARDS-TRACK]