RFC Abstracts

RFC5547 - A Session Description Protocol (SDP) Offer/Answer Mechanism to Enable File Transfer
This document provides a mechanism to negotiate the transfer of one or more files between two endpoints by using the Session Description Protocol (SDP) offer/answer model specified in RFC 3264. SDP is extended to describe the attributes of the files to be transferred. The offerer can describe either the files it wants to send or the files it would like to receive. The answerer can either accept or reject the offer separately for each individual file. The transfer of one or more files is initiated after a successful negotiation. The Message Session Relay Protocol (MSRP) is defined as the default mechanism to actually carry the files between the endpoints. The conventions on how to use MSRP for file transfer are also provided in this document. [STANDARDS-TRACK]
RFC5546 - iCalendar Transport-Independent Interoperability Protocol (iTIP)
This document specifies a protocol that uses the iCalendar object specification to provide scheduling interoperability between different calendaring systems. This is done without reference to a specific transport protocol so as to allow multiple methods of communication between systems. Subsequent documents will define profiles of this protocol that use specific, interoperable methods of communication between systems.
RFC5545 - Internet Calendaring and Scheduling Core Object Specification (iCalendar)
This document defines the iCalendar data format for representing and exchanging calendaring and scheduling information such as events, to-dos, journal entries, and free/busy information, independent of any particular calendar service or protocol. [STANDARDS-TRACK]
RFC5544 - Syntax for Binding Documents with Time-Stamps
This document describes an envelope that can be used to bind a file (not necessarily protected by means of cryptographic techniques) with one or more time-stamp tokens obtained for that file, where "time-stamp token" has the meaning defined in RFC 3161 or its successors. Additional types of temporal evidence are also allowed.
RFC5543 - BGP Traffic Engineering Attribute
This document defines a new BGP attribute, the Traffic Engineering attribute, that enables BGP to carry Traffic Engineering information.
RFC5542 - Definitions of Textual Conventions for Pseudowire (PW) Management
This memo defines a Management Information Base (MIB) module that contains textual conventions (TCs) to represent commonly used pseudowire (PW) management information. The intent is that these TCs will be imported and used in PW-related MIB modules that would otherwise define their own representations. [STANDARDS-TRACK]
RFC5541 - Encoding of Objective Functions in the Path Computation Element Communication Protocol (PCEP)
The computation of one or a set of Traffic Engineering Label Switched Paths (TE LSPs) in MultiProtocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks is subject to a set of one or more specific optimization criteria, referred to as objective functions (e.g., minimum cost path, widest path, etc.).
RFC5540 - 40 Years of RFCs
This RFC marks the 40th anniversary of the RFC document series. This memo provides information for the Internet community.
RFC5539 - NETCONF over Transport Layer Security (TLS)
The Network Configuration Protocol (NETCONF) provides mechanisms to install, manipulate, and delete the configuration of network devices. This document describes how to use the Transport Layer Security (TLS) protocol to secure NETCONF exchanges. [STANDARDS-TRACK]
RFC5538 - The 'news' and 'nntp' URI Schemes
This memo specifies the 'news' and 'nntp' Uniform Resource Identifier (URI) schemes that were originally defined in RFC 1738. The purpose of this document is to allow RFC 1738 to be made obsolete while keeping the information about these schemes on the Standards Track. [STANDARDS-TRACK]
RFC5537 - Netnews Architecture and Protocols
This document defines the architecture of Netnews systems and specifies the correct manipulation and interpretation of Netnews articles by software that originates, distributes, stores, and displays them. It also specifies the requirements that must be met by any protocol used to transport and serve Netnews articles. [STANDARDS-TRACK]
RFC5536 - Netnews Article Format
This document specifies the syntax of Netnews articles in the context of the Internet Message Format (RFC 5322) and Multipurpose Internet Mail Extensions (MIME) (RFC 2045). This document obsoletes RFC 1036, providing an updated specification to reflect current practice and incorporating incremental changes specified in other documents. [STANDARDS-TRACK]
RFC5535 - Hash-Based Addresses (HBA)
This memo describes a mechanism to provide a secure binding between the multiple addresses with different prefixes available to a host within a multihomed site. This mechanism employs either Cryptographically Generated Addresses (CGAs) or a new variant of the same theme that uses the same format in the addresses. The main idea in the new variant is that information about the multiple prefixes is included within the addresses themselves. This is achieved by generating the interface identifiers of the addresses of a host as hashes of the available prefixes and a random number. Then, the multiple addresses are generated by prepending the different prefixes to the generated interface identifiers. The result is a set of addresses, called Hash-Based Addresses (HBAs), that are inherently bound to each other. [STANDARDS-TRACK]
RFC5534 - Failure Detection and Locator Pair Exploration Protocol for IPv6 Multihoming
This document specifies how the level 3 multihoming Shim6 protocol (Shim6) detects failures between two communicating nodes. It also specifies an exploration protocol for switching to another pair of interfaces and/or addresses between the same nodes if a failure occurs and an operational pair can be found. [STANDARDS-TRACK]
RFC5533 - Shim6: Level 3 Multihoming Shim Protocol for IPv6
This document defines the Shim6 protocol, a layer 3 shim for providing locator agility below the transport protocols, so that multihoming can be provided for IPv6 with failover and load-sharing properties, without assuming that a multihomed site will have a provider-independent IPv6 address prefix announced in the global IPv6 routing table. The hosts in a site that has multiple provider- allocated IPv6 address prefixes will use the Shim6 protocol specified in this document to set up state with peer hosts so that the state can later be used to failover to a different locator pair, should the original one stop working. [STANDARDS-TRACK]
RFC5532 - Network File System (NFS) Remote Direct Memory Access (RDMA) Problem Statement
This document addresses enabling the use of Remote Direct Memory Access (RDMA) by the Network File System (NFS) protocols. NFS implementations historically incur significant overhead due to data copies on end-host systems, as well as other processing overhead. This document explores the potential benefits of RDMA to these implementations and evaluates the reasons why RDMA is especially well-suited to NFS and network file protocols in general. This memo provides information for the Internet community.
RFC5531 - RPC: Remote Procedure Call Protocol Specification Version 2
This document describes the Open Network Computing (ONC) Remote Procedure Call (RPC) version 2 protocol as it is currently deployed and accepted. This document obsoletes RFC 1831. [STANDARDS-TRACK]
RFC5530 - IMAP Response Codes
IMAP responses consist of a response type (OK, NO, BAD), an optional machine-readable response code, and a human-readable text.
RFC5529 - Modes of Operation for Camellia for Use with IPsec
This document describes the use of the Camellia block cipher algorithm in Cipher Block Chaining (CBC) mode, Counter (CTR) mode, and Counter with CBC-MAC (CCM) mode as additional, optional-to- implement Internet Key Exchange Protocol version 2 (IKEv2) and Encapsulating Security Payload (ESP) mechanisms to provide confidentiality, data origin authentication, and connectionless integrity. [STANDARDS-TRACK]
RFC5528 - Camellia Counter Mode and Camellia Counter with CBC-MAC Mode Algorithms
This document describes the algorithms and presents test vectors for the Camellia block cipher algorithm in Counter mode (CTR) and Counter with Cipher Block Chaining MAC mode (CCM). The purpose of this document is to make the Camellia-CTR and Camellia-CCM algorithm conveniently available to the Internet Community. This memo provides information for the Internet community.
RFC5527 - Combined User and Infrastructure ENUM in the e164.arpa Tree
This memo defines an interim solution for Infrastructure ENUM in order to allow a combined User and Infrastructure ENUM implementation in e164.arpa as a national choice. This interim solution will be deprecated after implementation of the long-term solution. This memo provides information for the Internet community.
RFC5526 - The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application for Infrastructure ENUM
This document defines the use case for Infrastructure ENUM and proposes its implementation as a parallel namespace to "e164.arpa", as defined in RFC 3761, as the long-term solution to the problem of allowing carriers to provision DNS records for telephone numbers independently of those provisioned by end users (number assignees). This memo provides information for the Internet community.
RFC5525 - Reliable Server Pooling MIB Module Definition
Reliable Server Pooling (RSerPool) is a framework to provide reliable server pooling. The RSerPool framework consists of two protocols: ASAP (Aggregate Server Access Protocol) and ENRP (Endpoint Handlespace Redundancy Protocol). This document defines an \%SMIv2- compliant (Structure of Management Information Version 2) Management Information Base (MIB) module providing access to managed objects in an RSerPool implementation. This memo defines an Experimental Protocol for the Internet community.
RFC5524 - Extended URLFETCH for Binary and Converted Parts
The URLFETCH command defined as part of URLAUTH provides a mechanism for third parties to gain access to data held within messages in a user's private store; however, this data is sent verbatim, which is not suitable for a number of applications. This memo specifies a method for obtaining data in forms suitable for non-mail applications. [STANDARDS-TRACK]
RFC5523 - OSPFv3-Based Layer 1 VPN Auto-Discovery
This document defines an OSPFv3-based (Open Shortest Path First version 3) Layer 1 Virtual Private Network (L1VPN) auto-discovery mechanism. This document parallels the existing OSPF version 2 L1VPN auto-discovery mechanism. The notable functional difference is the support of IPv6. This memo defines an Experimental Protocol for the Internet community.
RFC5522 - Network Mobility Route Optimization Requirements for Operational Use in Aeronautics and Space Exploration Mobile Networks
This document describes the requirements and desired properties of Network Mobility (NEMO) Route Optimization techniques for use in global-networked communications systems for aeronautics and space exploration.
RFC5521 - Extensions to the Path Computation Element Communication Protocol (PCEP) for Route Exclusions
The Path Computation Element (PCE) provides functions of path computation in support of traffic engineering (TE) in Multi-Protocol Label Switching (MPLS) and Generalized MPLS (GMPLS) networks.
RFC5520 - Preserving Topology Confidentiality in Inter-Domain Path Computation Using a Path-Key-Based Mechanism
Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Traffic Engineering (TE) Label Switched Paths (LSPs) may be computed by Path Computation Elements (PCEs). Where the TE LSP crosses multiple domains, such as Autonomous Systems (ASes), the path may be computed by multiple PCEs that cooperate, with each responsible for computing a segment of the path. However, in some cases (e.g., when ASes are administered by separate Service Providers), it would break confidentiality rules for a PCE to supply a path segment to a PCE in another domain, thus disclosing AS-internal topology information. This issue may be circumvented by returning a loose hop and by invoking a new path computation from the domain boundary Label Switching Router (LSR) during TE LSP setup as the signaling message enters the second domain, but this technique has several issues including the problem of maintaining path diversity.
RFC5519 - Multicast Group Membership Discovery 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 objects used for managing the Internet Group Management Protocol (IGMP) and the Multicast Listener Discovery (MLD) protocol. [STANDARDS-TRACK]
RFC5518 - Vouch By Reference
This document describes the Vouch By Reference (VBR) protocol. VBR is a protocol for adding third-party certification to email. It permits independent third parties to certify the owner of a domain name that is associated with received mail. [STANDARDS-TRACK]
RFC5517 - Cisco Systems' Private VLANs: Scalable Security in a Multi-Client Environment
This document describes a mechanism to achieve device isolation through the application of special Layer 2 forwarding constraints. Such a mechanism allows end devices to share the same IP subnet while being Layer 2 isolated, which in turn allows network designers to employ larger subnets and so reduce the address management overhead.
RFC5516 - Diameter Command Code Registration for the Third Generation Partnership Project (3GPP) Evolved Packet System (EPS)
This document registers a set of IANA Diameter Command Codes to be used in new vendor-specific Diameter applications defined for the Third Generation Partnership Project (3GPP) Evolved Packet System (EPS). These new Diameter applications are defined for Mobile Management Entity (MME)- and Serving GPRS (General Packet Radio Service) Support Node (SGSN)-related interfaces in the architecture for the Evolved 3GPP Packet Switched Domain, which is also known as the Evolved Packet System (EPS). This memo provides information for the Internet community.
RFC5515 - Layer 2 Tunneling Protocol (L2TP) Access Line Information Attribute Value Pair (AVP) Extensions
This document describes a set of Layer 2 Tunneling Protocol (L2TP) Attribute Value Pair (AVP) extensions designed to carry the subscriber Access Line identification and characterization information that arrives at the Broadband Remote Access Server (BRAS) with L2TP Access Concentrator (LAC) functionality. It also describes a mechanism to report connection speed changes, after the initial connection speeds are sent during session establishment. The primary purpose of this document is to provide a reference for DSL equipment vendors wishing to interoperate with other vendors' products. The L2TP AVPs defined in this document are applicable to both L2TPv2 and L2TPv3. This memo provides information for the Internet community.
RFC5514 - IPv6 over Social Networks
There is a lack of IPv6 utilization in early 2009; this is partly linked to the fact that the number of IPv6 nodes is rather low. This document proposes to vastly increase the number of IPv6 hosts by transforming all Social Networking platforms into IPv6 networks. This will immediately add millions of IPv6 hosts to the existing IPv6 Internet. This document includes sections on addressing and transport of IPv6 over a Social Network. A working prototype has been developed. This memo defines an Experimental Protocol for the Internet community.
RFC5513 - IANA Considerations for Three Letter Acronyms
Three Letter Acronyms (TLAs) are commonly used to identify components of networks or protocols as designed or specified within the IETF. A common concern is that one acronym may have multiple expansions. While this may not have been an issue in the past, network convergence means that protocols that did not previously operate together are now found in close proximity. This results in contention for acronyms, and confusion in interpretation. Such confusion has the potential to degrade the performance of the Internet as misunderstandings lead to misconfiguration or other operating errors.
RFC5512 - The BGP Encapsulation Subsequent Address Family Identifier (SAFI) and the BGP Tunnel Encapsulation Attribute
In certain situations, transporting a packet from one Border Gateway Protocol (BGP) speaker to another (the BGP next hop) requires that the packet be encapsulated by the first BGP speaker and decapsulated by the second. To support these situations, there needs to be some agreement between the two BGP speakers with regard to the "encapsulation information", i.e., the format of the encapsulation header as well as the contents of various fields of the header.
RFC5511 - Routing Backus-Naur Form (RBNF): A Syntax Used to Form Encoding Rules in Various Routing Protocol Specifications
Several protocols have been specified in the Routing Area of the IETF using a common variant of the Backus-Naur Form (BNF) of representing message syntax. However, there is no formal definition of this version of BNF.
RFC5510 - Reed-Solomon Forward Error Correction (FEC) Schemes
This document describes a Fully-Specified Forward Error Correction (FEC) Scheme for the Reed-Solomon FEC codes over GF(2^^m), where m is in {2..16}, and its application to the reliable delivery of data objects on the packet erasure channel (i.e., a communication path where packets are either received without any corruption or discarded during transmission). This document also describes a Fully-Specified FEC Scheme for the special case of Reed-Solomon codes over GF(2^^8) when there is no encoding symbol group. Finally, in the context of the Under-Specified Small Block Systematic FEC Scheme (FEC Encoding ID 129), this document assigns an FEC Instance ID to the special case of Reed-Solomon codes over GF(2^^8).
RFC5509 - Internet Assigned Numbers Authority (IANA) Registration of Instant Messaging and Presence DNS SRV RRs for the Session Initiation Protocol (SIP)
This document registers with IANA two new DNS SRV protocol labels for resolving Instant Messaging and Presence services with SIP. [STANDARDS TRACK]
RFC5508 - NAT Behavioral Requirements for ICMP
This document specifies the behavioral properties required of the Network Address Translator (NAT) devices in conjunction with the Internet Control Message Protocol (ICMP). The objective of this memo is to make NAT devices more predictable and compatible with diverse application protocols that traverse the devices. Companion documents provide behavioral recommendations specific to TCP, UDP, and other protocols. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC5507 - Design Choices When Expanding the DNS
This note discusses how to extend the DNS with new data for a new application. DNS extension discussions too often focus on reuse of the TXT Resource Record Type. This document lists different mechanisms to extend the DNS, and concludes that the use of a new DNS Resource Record Type is the best solution. This memo provides information for the Internet community.
RFC5506 - Support for Reduced-Size Real-Time Transport Control Protocol (RTCP): Opportunities and Consequences
This memo discusses benefits and issues that arise when allowing Real-time Transport Protocol (RTCP) packets to be transmitted with reduced size. The size can be reduced if the rules on how to create compound packets outlined in RFC 3550 are removed or changed. Based on that analysis, this memo defines certain changes to the rules to allow feedback messages to be sent as Reduced-Size RTCP packets under certain conditions when using the RTP/AVPF (Real-time Transport Protocol / Audio-Visual Profile with Feedback) profile (RFC 4585). This document updates RFC 3550, RFC 3711, and RFC 4585. [STANDARDS-TRACK]
RFC5505 - Principles of Internet Host Configuration
This document describes principles of Internet host configuration. It covers issues relating to configuration of Internet-layer parameters, as well as parameters affecting higher-layer protocols. This memo provides information for the Internet community.
RFC5504 - Downgrading Mechanism for Email Address Internationalization
Traditional mail systems handle only ASCII characters in SMTP envelope and mail header fields. The Email Address Internationalization (UTF8SMTP) extension allows UTF-8 characters in SMTP envelope and mail header fields. To avoid rejecting internationalized email messages when a server in the delivery path does not support the UTF8SMTP extension, some sort of converting mechanism is required. This document describes a downgrading mechanism for Email Address Internationalization. Note that this is a way to downgrade, not tunnel. There is no associated up-conversion mechanism, although internationalized email clients might use original internationalized addresses or other data when displaying or replying to downgraded messages. This memo defines an Experimental Protocol for the Internet community.
RFC5503 - Private Session Initiation Protocol (SIP) Proxy-to-Proxy Extensions for Supporting the PacketCable Distributed Call Signaling Architecture
In order to deploy a residential telephone service at a very large scale across different domains, it is necessary for trusted elements owned by different service providers to exchange trusted information that conveys customer-specific information and expectations about the parties involved in the call. This document describes private extensions to the Session Initiation Protocol, RFC 3261, for supporting the exchange of customer information and billing information between trusted entities in the PacketCable Distributed Call Signaling Architecture. These extensions provide mechanisms for access network coordination to prevent theft of service, customer originated trace of harassing calls, support for operator services and emergency services, and support for various other regulatory issues. The use of the extensions is only applicable within closed administrative domains, or among federations of administrative domains with previously agreed-upon policies where coordination of charging and other functions is required. This memo provides information for the Internet community.
RFC5502 - The SIP P-Served-User Private-Header (P-Header) for the 3GPP IP Multimedia (IM) Core Network (CN) Subsystem
This document specifies the SIP P-Served-User P-header. This header field addresses an issue that was found in the 3rd Generation Partnership Project (3GPP) IMS (IP Multimedia Subsystem) between an S-CSCF (Serving Call Session Control Function) and an AS (Application Server) on the ISC (IMS Service Control) interface. This header field conveys the identity of the served user and the session case that applies to this particular communication session and application invocation. This memo provides information for the Internet community.
RFC5501 - Requirements for Multicast Support in Virtual Private LAN Services
This document provides functional requirements for network solutions that support multicast over Virtual Private LAN Service (VPLS). It specifies requirements both from the end user and service provider standpoints. It is intended that potential solutions will use these requirements as guidelines. This memo provides information for the Internet community.
RFC5498 - IANA Allocations for Mobile Ad Hoc Network (MANET) Protocols
This document enumerates several common IANA allocations for use by Mobile Ad hoc NETwork (MANET) protocols. The following well-known numbers are required: a UDP port number, an IP protocol number, and a link-local multicast group address. [STANDARDS-TRACK]
RFC5497 - Representing Multi-Value Time in Mobile Ad Hoc Networks (MANETs)
This document describes a general and flexible TLV (type-length-value structure) for representing time-values, such as an interval or a duration, using the generalized Mobile Ad hoc NETwork (MANET) packet/ message format. It defines two Message TLVs and two Address Block TLVs for representing validity and interval times for MANET routing protocols. [STANDARDS-TRACK]
RFC5496 - The Reverse Path Forwarding (RPF) Vector TLV
This document describes a use of the Protocol Independent Multicast (PIM) Join Attribute as defined in RFC 5384, which enables PIM to build multicast trees through an MPLS-enabled network, even if that network's IGP does not have a route to the source of the tree. [STANDARDS-TRACK]