RFC Abstracts

RFC4607 - Source-Specific Multicast for IP
IP version 4 (IPv4) addresses in the 232/8 (232.0.0.0 to 232.255.255.255) range are designated as source-specific multicast (SSM) destination addresses and are reserved for use by source-specific applications and protocols. For IP version 6 (IPv6), the address prefix FF3x::/32 is reserved for source-specific multicast use. This document defines an extension to the Internet network service that applies to datagrams sent to SSM addresses and defines the host and router requirements to support this extension. [STANDARDS-TRACK]
RFC4606 - Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control
This document provides minor clarification to RFC 3946.
RFC4605 - Internet Group Management Protocol (IGMP) / Multicast Listener Discovery (MLD)-Based Multicast Forwarding ("IGMP/MLD Proxying")
In certain topologies, it is not necessary to run a multicast routing protocol. It is sufficient for a device to learn and proxy group membership information and simply forward multicast packets based upon that information. This document describes a mechanism for forwarding based solely upon Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) membership information. [STANDARDS-TRACK]
RFC4604 - Using Internet Group Management Protocol Version 3 (IGMPv3) and Multicast Listener Discovery Protocol Version 2 (MLDv2) for Source-Specific Multicast
The Internet Group Management Protocol Version 3 (IGMPv3) and the Multicast Listener Discovery Protocol Version 2 (MLDv2) are protocols that allow a host to inform its neighboring routers of its desire to receive IPv4 and IPv6 multicast transmissions, respectively. Source-specific multicast (SSM) is a form of multicast in which a receiver is required to specify both the network-layer address of the source and the multicast destination address in order to receive the multicast transmission. This document defines the notion of an "SSM-aware" router and host, and clarifies and (in some cases) modifies the behavior of IGMPv3 and MLDv2 on SSM-aware routers and hosts to accommodate source-specific multicast. This document updates the IGMPv3 and MLDv2 specifications. [STANDARDS-TRACK]
RFC4603 - Additional Values for the NAS-Port-Type Attribute
This document defines a set of values for the NAS-Port-Type RADIUS Attribute. This memo provides information for the Internet community.
RFC4602 - Protocol Independent Multicast - Sparse Mode (PIM-SM) IETF Proposed Standard Requirements Analysis
This document provides supporting documentation to advance the Protocol Independent Multicast - Sparse Mode (PIM-SM) routing protocol from IETF Experimental status to Proposed Standard. This memo provides information for the Internet community.
RFC4601 - Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)
This document specifies Protocol Independent Multicast - Sparse Mode (PIM-SM). PIM-SM is a multicast routing protocol that can use the underlying unicast routing information base or a separate multicast-capable routing information base. It builds unidirectional shared trees rooted at a Rendezvous Point (RP) per group, and optionally creates shortest-path trees per source.
RFC4598 - Real-time Transport Protocol (RTP) Payload Format for Enhanced AC-3 (E-AC-3) Audio
This document describes a Real-time Transport Protocol (RTP) payload format for transporting Enhanced AC-3 (E-AC-3) encoded audio data. E-AC-3 is a high-quality, multichannel audio coding format and is an extension of the AC-3 audio coding format, which is used in US High-Definition Television (HDTV), DVD, cable and satellite television, and other media. E-AC-3 is an optional audio format in US and world wide digital television and high-definition DVD formats. The RTP payload format as presented in this document includes support for data fragmentation. [STANDARDS-TRACK]
RFC4597 - Conferencing Scenarios
This document describes multimedia conferencing scenarios. It describes both basic and advanced conferencing scenarios involving voice, video, text, and interactive text sessions. These scenarios will help with the definition and evaluation of the protocols being developed in the centralized conferencing XCON working group. This memo provides information for the Internet community.
RFC4596 - Guidelines for Usage of the Session Initiation Protocol (SIP) Caller Preferences Extension
This document contains guidelines for usage of the Caller Preferences Extension to the Session Initiation Protocol (SIP). It demonstrates the benefits of caller preferences with specific example applications, provides use cases to show proper operation, provides guidance on the applicability of the registered feature tags, and describes a straightforward implementation of the preference and capability matching algorithm specified in Section 7.2 of RFC 3841. This memo provides information for the Internet community.
RFC4595 - Use of IKEv2 in the Fibre Channel Security Association Management Protocol
This document describes the use of IKEv2 to negotiate security protocols and transforms for Fibre Channel as part of the Fibre Channel Security Association Management Protocol. This usage requires that IKEv2 be extended with Fibre-Channel-specific security protocols, transforms, and name types. This document specifies these IKEv2 extensions and allocates identifiers for them. Using new IKEv2 identifiers for Fibre Channel security protocols avoids any possible confusion between IKEv2 negotiation for IP networks and IKEv2 negotiation for Fibre Channel. This memo provides information for the Internet community.
RFC4594 - Configuration Guidelines for DiffServ Service Classes
This document describes service classes configured with Diffserv and recommends how they can be used and how to construct them using Differentiated Services Code Points (DSCPs), traffic conditioners, Per-Hop Behaviors (PHBs), and Active Queue Management (AQM) mechanisms. There is no intrinsic requirement that particular DSCPs, traffic conditioners, PHBs, and AQM be used for a certain service class, but as a policy and for interoperability it is useful to apply them consistently. This memo provides information for the Internet community.
RFC4593 - Generic Threats to Routing Protocols
Routing protocols are subject to attacks that can harm individual users or network operations as a whole. This document provides a description and a summary of generic threats that affect routing protocols in general. This work describes threats, including threat sources and capabilities, threat actions, and threat consequences, as well as a breakdown of routing functions that might be attacked separately. This memo provides information for the Internet community.
RFC4592 - The Role of Wildcards in the Domain Name System
This is an update to the wildcard definition of RFC 1034. The interaction with wildcards and CNAME is changed, an error condition is removed, and the words defining some concepts central to wildcards are changed. The overall goal is not to change wildcards, but to refine the definition of RFC 1034. [STANDARDS-TRACK]
RFC4591 - Frame Relay over Layer 2 Tunneling Protocol Version 3 (L2TPv3)
The Layer 2 Tunneling Protocol, Version 3, (L2TPv3) defines a protocol for tunneling a variety of data link protocols over IP networks. This document describes the specifics of how to tunnel Frame Relay over L2TPv3, including frame encapsulation, virtual-circuit creation and deletion, and status change notification. [STANDARDS-TRACK]
RFC4590 - RADIUS Extension for Digest Authentication
This document defines an extension to the Remote Authentication Dial-In User Service (RADIUS) protocol to enable support of Digest Authentication, for use with HTTP-style protocols like the Session Initiation Protocol (SIP) and HTTP. [STANDARDS-TRACK]
RFC4589 - Location Types Registry
This document creates a registry for describing the types of places a human or end system might be found. The registry is then referenced by other protocols that need a common set of location terms as protocol constants. Examples of location terms defined in this document include aircraft, office, and train station. [STANDARDS-TRACK]
RFC4588 - RTP Retransmission Payload Format
RTP retransmission is an effective packet loss recovery technique for real-time applications with relaxed delay bounds. This document describes an RTP payload format for performing retransmissions. Retransmitted RTP packets are sent in a separate stream from the original RTP stream. It is assumed that feedback from receivers to senders is available. In particular, it is assumed that Real-time Transport Control Protocol (RTCP) feedback as defined in the extended RTP profile for RTCP-based feedback (denoted RTP/AVPF) is available in this memo. [STANDARDS-TRACK]
RFC4587 - RTP Payload Format for H.261 Video Streams
This memo describes a scheme to packetize an H.261 video stream for transport using the Real-time Transport Protocol, RTP, with any of the underlying protocols that carry RTP.
RFC4586 - Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback: Results of the Timing Rule Simulations
This document describes the results achieved when simulating the timing rules of the Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback, denoted AVPF. Unicast and multicast topologies are considered as well as several protocol and environment configurations. The results show that the timing rules result in better performance regarding feedback delay and still preserve the well-accepted RTP rules regarding allowed bit rates for control traffic. This memo provides information for the Internet community.
RFC4585 - Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)
Real-time media streams that use RTP are, to some degree, resilient against packet losses. Receivers may use the base mechanisms of the Real-time Transport Control Protocol (RTCP) to report packet reception statistics and thus allow a sender to adapt its transmission behavior in the mid-term. This is the sole means for feedback and feedback-based error repair (besides a few codec-specific mechanisms). This document defines an extension to the Audio-visual Profile (AVP) that enables receivers to provide, statistically, more immediate feedback to the senders and thus allows for short-term adaptation and efficient feedback-based repair mechanisms to be implemented. This early feedback profile (AVPF) maintains the AVP bandwidth constraints for RTCP and preserves scalability to large groups. [STANDARDS-TRACK]
RFC4584 - Extension to Sockets API for Mobile IPv6
This document describes data structures and API support for Mobile IPv6 as an extension to the Advanced Socket API for IPv6.
RFC4583 - Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams
This document specifies how to describe Binary Floor Control Protocol (BFCP) streams in Session Description Protocol (SDP) descriptions. User agents using the offer/answer model to establish BFCP streams use this format in their offers and answers. [STANDARDS-TRACK]
RFC4582 - The Binary Floor Control Protocol (BFCP)
Floor control is a means to manage joint or exclusive access to shared resources in a (multiparty) conferencing environment. Thereby, floor control complements other functions -- such as conference and media session setup, conference policy manipulation, and media control -- that are realized by other protocols.
RFC4581 - Cryptographically Generated Addresses (CGA) Extension Field Format
This document defines a Type-Length-Value format for Cryptographically Generated Address (CGA) Extensions. This document updates RFC 3972. [STANDARDS-TRACK]
RFC4580 - Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Relay Agent Subscriber-ID Option
This memo defines a new Relay Agent Subscriber-ID option for the Dynamic Host Configuration Protocol for IPv6 (DHCPv6). The option allows a DHCPv6 relay agent to associate a stable "Subscriber-ID" with DHCPv6 client messages in a way that is independent of the client and of the underlying physical network infrastructure. [STANDARDS-TRACK]
RFC4579 - Session Initiation Protocol (SIP) Call Control - Conferencing for User Agents
This specification defines conferencing call control features for the Session Initiation Protocol (SIP). This document builds on the Conferencing Requirements and Framework documents to define how a tightly coupled SIP conference works. The approach is explored from the perspective of different user agent (UA) types: conference-unaware, conference-aware, and focus UAs. The use of Uniform Resource Identifiers (URIs) in conferencing, OPTIONS for capabilities discovery, and call control using REFER are covered in detail with example call flow diagrams. The usage of the isfocus feature tag is defined. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
RFC4578 - Dynamic Host Configuration Protocol (DHCP) Options for the Intel Preboot eXecution Environment (PXE)
We define Dynamic Host Configuration Protocol (DHCP) options being used by Preboot eXecution Environment (PXE) and Extensible Firmware Interface (EFI) clients to uniquely identify booting client machines and their pre-OS runtime environment so that the DHCP and/or PXE boot server can return the correct OS bootstrap image (or pre-boot application) name and server to the client. This memo provides information for the Internet community.
RFC4577 - OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs)
Many Service Providers offer Virtual Private Network (VPN) services to their customers, using a technique in which customer edge routers (CE routers) are routing peers of provider edge routers (PE routers). The Border Gateway Protocol (BGP) is used to distribute the customer's routes across the provider's IP backbone network, and Multiprotocol Label Switching (MPLS) is used to tunnel customer packets across the provider's backbone. This is known as a "BGP/MPLS IP VPN". The base specification for BGP/MPLS IP VPNs presumes that the routing protocol on the interface between a PE router and a CE router is BGP. This document extends that specification by allowing the routing protocol on the PE/CE interface to be the Open Shortest Path First (OSPF) protocol.
RFC4576 - Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)
This document specifies a procedure that deals with a particular issue that may arise when a Service Provider (SP) provides "BGP/MPLS IP VPN" service to a customer and the customer uses OSPFv2 to advertise its routes to the SP. In this situation, a Customer Edge (CE) Router and a Provider Edge (PE) Router are OSPF peers, and customer routes are sent via OSPFv2 from the CE to the PE. The customer routes are converted into BGP routes, and BGP carries them across the backbone to other PE routers. The routes are then converted back to OSPF routes sent via OSPF to other CE routers. As a result of this conversion, some of the information needed to prevent loops may be lost. A procedure is needed to ensure that once a route is sent from a PE to a CE, the route will be ignored by any PE that receives it back from a CE. This document specifies the necessary procedure, using one of the options bits in the LSA (Link State Advertisements) to indicate that an LSA has already been forwarded by a PE and should be ignored by any other PEs that see it. [STANDARDS-TRACK]
RFC4575 - A Session Initiation Protocol (SIP) Event Package for Conference State
This document defines a conference event package for tightly coupled conferences using the Session Initiation Protocol (SIP) events framework, along with a data format used in notifications for this package. The conference package allows users to subscribe to a conference Uniform Resource Identifier (URI). Notifications are sent about changes in the membership of this conference and optionally about changes in the state of additional conference components. [STANDARDS-TRACK]
RFC4574 - The Session Description Protocol (SDP) Label Attribute
This document defines a new Session Description Protocol (SDP) media-level attribute: "label". The "label" attribute carries a pointer to a media stream in the context of an arbitrary network application that uses SDP. The sender of the SDP document can attach the "label" attribute to a particular media stream or streams. The application can then use the provided pointer to refer to each particular media stream in its context. [STANDARDS-TRACK]
RFC4573 - MIME Type Registration for RTP Payload Format for H.224
In conversational video applications, far-end camera control protocol is used by participants to control the remote camera. The protocol that is commonly used is ITU H.281 over H.224. The document registers the H224 media type. It defines the syntax and the semantics of the Session Description Protocol (SDP) parameters needed to support far-end camera control protocol using H.224. [STANDARDS-TRACK]
RFC4572 - Connection-Oriented Media Transport over the Transport Layer Security (TLS) Protocol in the Session Description Protocol (SDP)
This document specifies how to establish secure connection-oriented media transport sessions over the Transport Layer Security (TLS) protocol using the Session Description Protocol (SDP). It defines a new SDP protocol identifier, 'TCP/TLS'. It also defines the syntax and semantics for an SDP 'fingerprint' attribute that identifies the certificate that will be presented for the TLS session. This mechanism allows media transport over TLS connections to be established securely, so long as the integrity of session descriptions is assured.
RFC4571 - Framing Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP) Packets over Connection-Oriented Transport
This memo defines a method for framing Real-time Transport Protocol (RTP) and RTP Control Protocol (RTCP) packets onto connection-oriented transport (such as TCP). The memo also defines how session descriptions may specify RTP streams that use the framing method. [STANDARDS-TRACK]
RFC4570 - Session Description Protocol (SDP) Source Filters
This document describes how to adapt the Session Description Protocol (SDP) to express one or more source addresses as a source filter for one or more destination "connection" addresses. It defines the syntax and semantics for an SDP "source-filter" attribute that may reference either IPv4 or IPv6 address(es) as either an inclusive or exclusive source list for either multicast or unicast destinations. In particular, an inclusive source-filter can be used to specify a Source-Specific Multicast (SSM) session. [STANDARDS-TRACK]
RFC4569 - Internet Assigned Number Authority (IANA) Registration of the Message Media Feature Tag
This document registers with the IANA a new media feature tag associated with the 'message' media type. This media feature tag indicates that a particular device supports 'message' as a streaming media type. Media feature tags can be used to route calls to devices that support certain features. This memo provides information for the Internet community.
RFC4568 - Session Description Protocol (SDP) Security Descriptions for Media Streams
This document defines a Session Description Protocol (SDP) cryptographic attribute for unicast media streams. The attribute describes a cryptographic key and other parameters that serve to configure security for a unicast media stream in either a single message or a roundtrip exchange. The attribute can be used with a variety of SDP media transports, and this document defines how to use it for the Secure Real-time Transport Protocol (SRTP) unicast media streams. The SDP crypto attribute requires the services of a data security protocol to secure the SDP message. [STANDARDS-TRACK]
RFC4567 - Key Management Extensions for Session Description Protocol (SDP) and Real Time Streaming Protocol (RTSP)
This document defines general extensions for Session Description Protocol (SDP) and Real Time Streaming Protocol (RTSP) to carry messages, as specified by a key management protocol, in order to secure the media. These extensions are presented as a framework, to be used by one or more key management protocols. As such, their use is meaningful only when complemented by an appropriate key management protocol.
RFC4566 - SDP: Session Description Protocol
This memo defines the Session Description Protocol (SDP). SDP is intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. [STANDARDS-TRACK]
RFC4565 - Evaluation of Candidate Control and Provisioning of Wireless Access Points (CAPWAP) Protocols
This document is a record of the process and findings of the Control and Provisioning of Wireless Access Points Working Group (CAPWAP WG) evaluation team. The evaluation team reviewed the 4 candidate protocols as they were submitted to the working group on June 26, 2005. his memo provides information for the Internet community.
RFC4564 - Objectives for Control and Provisioning of Wireless Access Points (CAPWAP)
This document presents objectives for an interoperable protocol for the Control and Provisioning of Wireless Access Points (CAPWAP). The document aims to establish a set of focused requirements for the development and evaluation of a CAPWAP protocol. The objectives address architecture, operation, security, and network operator requirements that are necessary to enable interoperability among Wireless Local Area Network (WLAN) devices of alternative designs. This memo provides information for the Internet community.
RFC4563 - The Key ID Information Type for the General Extension Payload in Multimedia Internet KEYing (MIKEY)
This memo specifies a new Type (the Key ID Information Type) for the General Extension Payload in the Multimedia Internet KEYing (MIKEY) Protocol. This is used in, for example, the Multimedia Broadcast/Multicast Service specified in the Third Generation Partnership Project. [STANDARDS-TRACK]
RFC4562 - MAC-Forced Forwarding: A Method for Subscriber Separation on an Ethernet Access Network
This document describes a mechanism to ensure layer-2 separation of Local Area Network (LAN) stations accessing an IPv4 gateway over a bridged Ethernet segment.
RFC4561 - Definition of a Record Route Object (RRO) Node-Id Sub-Object
In the context of MPLS TE Fast Reroute, the Merge Point (MP) address is required at the Point of Local Repair (PLR) in order to select a backup tunnel intersecting a fast reroutable Traffic Engineering Label Switched Path (TE LSP) on a downstream Label Switching Router (LSR). However, existing protocol mechanisms are not sufficient to find an MP address in multi-domain routing networks where a domain is defined as an Interior Gateway Protocol (IGP) area or an Autonomous System (AS). Hence, the current MPLS Fast Reroute mechanism cannot be used in order to protect inter-domain TE LSPs from a failure of an Area Border Router (ABR) or Autonomous System Border Router (ASBR). This document specifies the use of existing Record Route Object (RRO) IPv4 and IPv6 sub-objects (with a new flag defined) thus defining the node-id sub-object in order to solve this issue. The MPLS Fast Reroute mechanism mentioned in this document refers to the "Facility backup" MPLS TE Fast Reroute method. [STANDARDS-TRACK]
RFC4560 - Definitions of Managed Objects for Remote Ping, Traceroute, and Lookup Operations
This memo defines Management Information Bases (MIBs) for performing ping, traceroute, and lookup operations at a host. When managing a network, it is useful to be able to initiate and retrieve the results of ping or traceroute operations when they are performed at a remote host. A lookup capability is defined in order to enable resolution of either an IP address to an DNS name or a DNS name to an IP address at a remote host.
RFC4559 - SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows
This document describes how the Microsoft Internet Explorer (MSIE) and Internet Information Services (IIS) incorporated in Microsoft Windows 2000 use Kerberos for security enhancements of web transactions. The Hypertext Transport Protocol (HTTP) auth-scheme of "negotiate" is defined here; when the negotiation results in the selection of Kerberos, the security services of authentication and, optionally, impersonation (the IIS server assumes the windows identity of the principal that has been authenticated) are performed. This document explains how HTTP authentication utilizes the Simple and Protected GSS-API Negotiation mechanism. Details of Simple And Protected Negotiate (SPNEGO) implementation are not provided in this document. This memo provides information for the Internet community.
RFC4558 - Node-ID Based Resource Reservation Protocol (RSVP) Hello: A Clarification Statement
Use of Node-ID based Resource Reservation Protocol (RSVP) Hello messages is implied in a number of cases, e.g., when data and control planes are separated, when TE links are unnumbered. Furthermore, when link level failure detection is performed by some means other than exchanging RSVP Hello messages, use of a Node-ID based Hello session is optimal for detecting signaling adjacency failure for Resource reSerVation Protocol-Traffic Engineering (RSVP-TE). Nonetheless, this implied behavior is unclear, and this document formalizes use of the Node-ID based RSVP Hello session in some scenarios. The procedure described in this document applies to both Multi-Protocol Label Switching (MPLS) and Generalized MPLS (GMPLS) capable nodes. [STANDARDS-TRACK]
RFC4557 - Online Certificate Status Protocol (OCSP) Support for Public Key Cryptography for Initial Authentication in Kerberos (PKINIT)
This document defines a mechanism to enable in-band transmission of Online Certificate Status Protocol (OCSP) responses in the Kerberos network authentication protocol. These responses are used to verify the validity of the certificates used in Public Key Cryptography for Initial Authentication in Kerberos (PKINIT), which is the Kerberos Version 5 extension that provides for the use of public key cryptography. [STANDARDS-TRACK]
RFC4556 - Public Key Cryptography for Initial Authentication in Kerberos (PKINIT)
This document describes protocol extensions (hereafter called PKINIT) to the Kerberos protocol specification. These extensions provide a method for integrating public key cryptography into the initial authentication exchange, by using asymmetric-key signature and/or encryption algorithms in pre-authentication data fields. [STANDARDS-TRACK]