addressing

This document specifies the approval process for changes to the "IPv6

Address Space" registry. It also updates RFC 7249.

Segment Routing over IPv6 (SRv6) uses IPv6 as the underlying data plane. Thus, Segment Identifiers (SIDs) used by SRv6 can resemble IPv6 addresses and behave like them while exhibiting slightly different behaviors in some situations. This document explores the characteristics of SRv6 SIDs and focuses on the relationship of SRv6 SIDs to the IPv6 Addressing Architecture. This document allocates and makes a dedicated prefix available for SRv6 SIDs.

Autonomic functions need a control plane to communicate, which depends on some addressing and routing. This Autonomic Control Plane should ideally be self-managing and be as independent as possible of configuration. This document defines such a plane and calls it the "Autonomic Control Plane", with the primary use as a control plane for autonomic functions. It also serves as a "virtual out-of-band channel" for Operations, Administration, and Management (OAM) communications over a network that provides automatically configured, hop-by-hop authenticated and encrypted communications via automatically configured IPv6 even when the network is not configured or is misconfigured.

This document describes an Extension Mechanisms for DNS (EDNS0) option that is in active use to carry information about the network that originated a DNS query and the network for which the subsequent response can be cached. Since it has some known operational and privacy shortcomings, a revision will be worked through the IETF for improvement.

This document describes a BGP/MPLS IP VPN-based subnet extension solution referred to as "Virtual Subnet", which can be used for building Layer 3 network virtualization overlays within and/or between data centers.

This document specifies a stateless solution for service providers to progressively deploy IPv6-only network domains while still offering IPv4 service to customers. The solution's distinctive properties are that TCP/UDP IPv4 packets are valid TCP/UDP IPv6 packets during domain traversal and that IPv4 fragmentation rules are fully preserved end to end. Each customer can be assigned one public IPv4 address, several public IPv4 addresses, or a shared address with a restricted port set.

The IPv6 unicast addressing format includes a separation between the prefix used to route packets to a subnet and the interface identifier used to specify a given interface connected to that subnet. Currently, the interface identifier is defined as 64 bits long for almost every case, leaving 64 bits for the subnet prefix. This document describes the advantages of this fixed boundary and analyzes the issues that would be involved in treating it as a variable boundary.

In an IPv6 network, it is possible to use only link-local addresses on infrastructure links between routers. This document discusses the advantages and disadvantages of this approach to facilitate the decision process for a given network.

The MPLS Transport Profile (MPLS-TP) is the set of MPLS protocol functions applicable to the construction and operation of packet- switched transport networks. This document presents considerations for link-layer addressing of Ethernet frames carrying MPLS-TP packets.

The framework for Operations, Administration and Maintenance (OAM) within the MPLS Transport Profile (MPLS-TP) describes how the Maintenance Entity Group Intermediate Points (MIPs) may be situated within network nodes at incoming and outgoing interfaces.

This document elaborates on important considerations for internal MIP addressing. More precisely, it describes important restrictions for any mechanism that specifies a way of forming OAM messages so that they can be targeted at MIPs on either incoming or outgoing interfaces and forwarded correctly through the forwarding engine. Furthermore, the document includes considerations for node implementations where there is no distinction between the incoming and outgoing MIP.

Many end-user sites in the Internet today still have predominantly IPv4 internal infrastructures. These sites range in size from small home/office networks to large corporate enterprise networks, but share the commonality that IPv4 provides satisfactory internal routing and addressing services for most applications. As more and more IPv6-only services are deployed, however, end-user devices within such sites will increasingly require at least basic IPv6 functionality. This document therefore provides operational guidance for deployment of IPv6 within predominantly IPv4 sites using the Intra-Site Automatic Tunnel Addressing Protocol (ISATAP).

In customer sites having IPv4-only Customer Premises Equipment (CPE), Teredo (RFC 4380, RFC 5991, RFC 6081) provides last-resort IPv6 connectivity. However, because it is designed to work without the involvement of Internet Service Providers, it has significant limitations (connectivity between IPv6 native addresses and Teredo addresses is uncertain; connectivity between Teredo addresses fails for some combinations of NAT types). 6a44 is a complementary solution that, being based on ISP cooperation, avoids these limitations. At the beginning of 6a44 IPv6 addresses, it replaces the Teredo well-known prefix, present at the beginning of Teredo IPv6 addresses, with network-specific /48 prefixes assigned by local ISPs (an evolution similar to that from 6to4 to 6rd (IPv6 Rapid Deployment on IPv4 Infrastructures)). The specification is expected to be complete enough for running code to be independently written and the solution to be incrementally deployed and used. This document defines an Experimental Protocol for the Internet community.

The purpose of this document is to provide a discussion of the potential problems of using private, RFC 1918, or non-globally routable addressing within the core of a Service Provider (SP) network. The discussion focuses on link addresses and, to a small extent, loopback addresses. While many of the issues are well recognised within the ISP community, there appears to be no document that collectively describes the issues. This document is not an Internet Standards Track specification; it is published for informational purposes.

This document requests the allocation of an IPv4 /10 address block to be used as Shared Address Space to accommodate the needs of Carrier- Grade NAT (CGN) devices. It is anticipated that Service Providers will use this Shared Address Space to number the interfaces that connect CGN devices to Customer Premises Equipment (CPE).

Shared Address Space is distinct from RFC 1918 private address space because it is intended for use on Service Provider networks. However, it may be used in a manner similar to RFC 1918 private address space on routing equipment that is able to do address translation across router interfaces when the addresses are identical on two different interfaces. Details are provided in the text of this document.

This document details the allocation of an additional special-use IPv4 address block and updates RFC 5735. This memo documents an Internet Best Current Practice.

When a private network or internetwork grows very large, it is sometimes not possible to address all interfaces using private IPv4 address space because there are not enough addresses. This document describes the problems faced by those networks, the available options, and the issues involved in assigning a new block of private IPv4 address space.

While this informational document does not make a recommendation for action, it documents the issues surrounding the various options that have been considered. This document is not an Internet Standards Track specification; it is published for informational purposes.

This document describes a framework for how the current IPv4 address space can be divided into two new address categories: a core address space (Area Locators, ALOCs) that is globally unique, and an edge address space (Endpoint Locators, ELOCs) that is regionally unique. In the future, the ELOC space will only be significant in a private network or in a service provider domain. Therefore, a 32x32 bit addressing scheme and a hierarchical routing architecture are achieved. The hierarchical IPv4 framework is backwards compatible with the current IPv4 Internet.

This document also discusses a method for decoupling the location and identifier functions -- future applications can make use of the separation. The framework requires extensions to the existing Domain Name System (DNS), the existing IPv4 stack of the endpoints, middleboxes, and routers in the Internet. The framework can be implemented incrementally for endpoints, DNS, middleboxes, and routers. This document defines an Experimental Protocol for the Internet community.

RFC 2754 requested that each time IANA made an address assignment, it was to create appropriate inetnum and as-block objects and digitally sign them. The purpose was to distribute the IANA-held public key in software implementations of the Distributed Routing Policy System. In practice, this was never done on the public Internet. This document requests that RFC 2754 be moved to Historic status. This document is not an Internet Standards Track specification; it is published for informational purposes.

It is commonly recognized that the Internet routing and addressing architecture is facing challenges in scalability, mobility, multi-homing, and inter-domain traffic engineering. The Routing Research Group is investigating an alternate architecture to meet these challenges. This document consists of a prioritized list of design goals for the target architecture. This document is not an Internet Standards Track specification; it is published for informational purposes.

On inter-router point-to-point links, it is useful, for security and other reasons, to use 127-bit IPv6 prefixes. Such a practice parallels the use of 31-bit prefixes in IPv4. This document specifies the motivation for, and usages of, 127-bit IPv6 prefix lengths on inter-router point-to-point links. [STANDARDS-TRACK]

RFC 3177 argued that in IPv6, end sites should be assigned /48 blocks in most cases. The Regional Internet Registries (RIRs) adopted that recommendation in 2002, but began reconsidering the policy in 2005. This document obsoletes the RFC 3177 recommendations on the assignment of IPv6 address space to end sites. The exact choice of how much address space to assign end sites is an issue for the operational community. The IETF's role in this case is limited to providing guidance on IPv6 architectural and operational considerations. This document reviews the architectural and operational considerations of end site assignments as well as the motivations behind the original recommendations in RFC 3177. Moreover, this document clarifies that a one-size-fits-all recommendation of /48 is not nuanced enough for the broad range of end sites and is no longer recommended as a single default.

This document obsoletes RFC 3177. [STANDARDS-TRACK]

Since the Internet must continue to support escalating growth due to increasing demand, it is clear that current routing architectures and operational practices must be updated. This document proposes an Internet Routing Overlay Network (IRON) that supports sustainable growth while requiring no changes to end systems and no changes to the existing routing system. IRON further addresses other important issues including routing scaling, mobility management, multihoming, traffic engineering and NAT traversal. While business considerations are an important determining factor for widespread adoption, they are out of scope for this document. This document is a product of the IRTF Routing Research Group. This document defines an Experimental Protocol for the Internet community.

"Routing and Addressing in Networks with Global Enterprise Recursion (RANGER)" (RFC 5720) provides an architectural framework for scalable routing and addressing. It provides an incrementally deployable approach for scalability, provider independence, mobility, multihoming, traffic engineering, and security. This document describes a series of use cases in order to showcase the architectural capabilities. It further shows how the RANGER architecture restores the network-within-network principles originally intended for the sustained growth of the Internet. This document is not an Internet Standards Track specification; it is published for informational purposes.

This document discusses the algorithmic translation of an IPv6 address to a corresponding IPv4 address, and vice versa, using only statically configured information. It defines a well-known prefix for use in algorithmic translations, while allowing organizations to also use network-specific prefixes when appropriate. Algorithmic translation is used in IPv4/IPv6 translators, as well as other types of proxies and gateways (e.g., for DNS) used in IPv4/IPv6 scenarios. [STANDARDS-TRACK]

This document describes a model for configuring IP addresses and subnet prefixes on the interfaces of routers which connect to links with undetermined connectivity properties. This document is not an Internet Standards Track specification; it is published for informational purposes.

IPv6 specifies a model of a subnet that is different than the IPv4 subnet model. The subtlety of the differences has resulted in incorrect implementations that do not interoperate. This document spells out the most important difference: that an IPv6 address isn't automatically associated with an IPv6 on-link prefix. This document also updates (partially due to security concerns caused by incorrect implementations) a part of the definition of "on-link" from RFC 4861. [STANDARDS-TRACK]

The Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) specifies a Non-Broadcast, Multiple Access (NBMA) interface type for the transmission of IPv6 packets over IPv4 networks using automatic IPv6-in-IPv4 encapsulation. The original specifications make no provisions for the encapsulation and transmission of IPv4 packets, however. This document specifies a method for transmitting IPv4 packets over ISATAP interfaces. This document is not an Internet Standards Track specification; it is published for informational purposes.

RANGER is an architectural framework for scalable routing and addressing in networks with global enterprise recursion. The term "enterprise network" within this context extends to a wide variety of use cases and deployment scenarios, where an "enterprise" can be as small as a Small Office, Home Office (SOHO) network, as dynamic as a Mobile Ad Hoc Network, as complex as a multi-organizational corporation, or as large as the global Internet itself. Such networks will require an architected solution for the coordination of routing and addressing plans with accommodations for scalability, provider-independence, mobility, multihoming, and security. These considerations are particularly true for existing deployments, but the same principles apply even for clean-slate approaches. The RANGER architecture addresses these requirements and provides a comprehensive framework for IPv6/IPv4 coexistence. This document is not an Internet Standards Track specification; it is published for informational purposes.

This document identifies two deployment scenarios that have arisen from the unconventional network topologies formed using Network Address Translator (NAT) devices. First, the simplicity of administering networks through the combination of NAT and DHCP has increasingly lead to the deployment of multi-level inter-connected private networks involving overlapping private IP address spaces. Second, the proliferation of private networks in enterprises, hotels and conferences, and the wide-spread use of Virtual Private Networks (VPNs) to access an enterprise intranet from remote locations has increasingly lead to overlapping private IP address space between remote and corporate networks. This document does not dismiss these unconventional scenarios as invalid, but recognizes them as real and offers recommendations to help ensure these deployments can function without a meltdown. This document is not an Internet Standards Track specification; it is published for informational purposes.

A typical function of a Session Initiation Protocol (SIP) Proxy is to insert a Record-Route header into initial, dialog-creating requests in order to make subsequent, in-dialog requests pass through it. This header contains a SIP Uniform Resource Identifier (URI) or SIPS (secure SIP) URI indicating where and how the subsequent requests should be sent to reach the proxy. These SIP or SIPS URIs can contain IPv4 or IPv6 addresses and URI parameters that could influence the routing such as the transport parameter (for example, transport=tcp), or a compression indication like "comp=sigcomp". When a proxy has to change some of those parameters between its incoming and outgoing interfaces (multi-homed proxies, transport protocol switching, or IPv4 to IPv6 scenarios, etc.), the question arises on what should be put in Record-Route header(s). It is not possible to make one header have the characteristics of both interfaces at the same time. This document aims to clarify these scenarios and fix bugs already identified on this topic; it formally recommends the use of the double Record-Route technique as an alternative to the current RFC 3261 text, which describes only a Record-Route rewriting solution. [STANDARDS-TRACK]

This document normatively updates RFC 3261, the Session Initiation Protocol (SIP), to address a security vulnerability identified in SIP proxy behavior. This vulnerability enables an attack against SIP networks where a small number of legitimate, even authorized, SIP requests can stimulate massive amounts of proxy-to-proxy traffic.

This document strengthens loop-detection requirements on SIP proxies when they fork requests (that is, forward a request to more than one destination). It also corrects and clarifies the description of the loop-detection algorithm such proxies are required to implement. Additionally, this document defines a Max-Breadth mechanism for limiting the number of concurrent branches pursued for any given request. [STANDARDS-TRACK]

One fundamental aspect of any IP communications infrastructure is its addressing plan. With its new address architecture and allocation policies, the introduction of IPv6 into a network means that network designers and operators need to reconsider their existing approaches to network addressing. Lack of guidelines on handling this aspect of network design could slow down the deployment and integration of IPv6. This document aims to provide the information and recommendations relevant to planning the addressing aspects of IPv6 deployments. The document also provides IPv6 addressing case studies for both an enterprise and an ISP network. This memo provides information for the Internet community.

Because the Internet forwards packets according to the IP destination address, packet forwarding typically takes place without inspection of the source address and malicious attacks have been launched using spoofed source addresses. In an effort to enhance the Internet with IP source address validation, a prototype implementation of the IP Source Address Validation Architecture (SAVA) was created and an evaluation was conducted on an IPv6 network. This document reports on the prototype implementation and the test results, as well as the lessons and insights gained from experimentation. This memo defines an Experimental Protocol for the Internet community.

The Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) connects dual-stack (IPv6/IPv4) nodes over IPv4 networks. ISATAP views the IPv4 network as a link layer for IPv6 and supports an automatic tunneling abstraction similar to the Non-Broadcast Multiple Access (NBMA) model. This memo provides information for the Internet community.

On email systems that allow for 'subaddressing' or 'detailed addressing' (e.g., "ken+sieve@example.org"), it is sometimes desirable to make comparisons against these sub-parts of addresses. This document defines an extension to the Sieve Email Filtering Language that allows users to compare against the user and detail sub-parts of an address. [STANDARDS-TRACK]

This document reports the outcome of the Routing and Addressing Workshop that was held by the Internet Architecture Board (IAB) on October 18-19, 2006, in Amsterdam, Netherlands. The primary goal of the workshop was to develop a shared understanding of the problems that the large backbone operators are facing regarding the scalability of today's Internet routing system. The key workshop findings include an analysis of the major factors that are driving routing table growth, constraints in router technology, and the limitations of today's Internet addressing architecture. It is hoped that these findings will serve as input to the IETF community and help identify next steps towards effective solutions.

Note that this document is a report on the proceedings of the workshop. The views and positions documented in this report are those of the workshop participants and not of the IAB. Furthermore, note that work on issues related to this workshop report is continuing, and this document does not intend to reflect the increased understanding of issues nor to discuss the range of potential solutions that may be the outcome of this ongoing work. This memo provides information for the Internet community.

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]

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.

This document describes modifications to the Session Initiation Protocol (SIP) to address problems that have been identified with the SIP non-INVITE transaction. These modifications reduce the probability of messages losing the race condition inherent in the non-INVITE transaction and reduce useless network traffic. They also improve the robustness of SIP networks when elements stop responding. These changes update behavior defined in RFC 3261. [STANDARDS-TRACK]

Voice messaging is traditionally addressed using telephone number addressing. This document describes two techniques for routing voice messages based on a telephone number. The complete service uses the Voice Profile for Internet Mail (VPIM) Directory service to lookup a VPIM email address with a telephone number and confirm that the address is both valid and associated with the intended recipient. However, this service will take time to become widely deployed in the near term. This document also describes a basic send-and-pray service that routes and delivers messages using only the ENUM telephone number resolution service and the existing DNS mail routing facilities. [STANDARDS-TRACK]

This document proposes a revised format for the IANA IPv6 address registries. Rather than providing a formal definition of the format, it is described by giving examples of the (current as of preparation of this document) contents of the registries in the proposed format. The proposed format would bring the IANA IPv6 address registries into alignment with the current IPv6 Address Architecture specification, as well as update it to a more useful and generally accepted format. This memo provides information for the Internet community.

To participate in wide-area IP networking, a host needs to be configured with IP addresses for its interfaces, either manually by the user or automatically from a source on the network such as a Dynamic Host Configuration Protocol (DHCP) server. Unfortunately, such address configuration information may not always be available. It is therefore beneficial for a host to be able to depend on a useful subset of IP networking functions even when no address configuration is available. This document describes how a host may automatically configure an interface with an IPv4 address within the 169.254/16 prefix that is valid for communication with other devices connected to the same physical (or logical) link.

IPv4 Link-Local addresses are not suitable for communication with devices not directly connected to the same physical (or logical) link, and are only used where stable, routable addresses are not available (such as on ad hoc or isolated networks). This document does not recommend that IPv4 Link-Local addresses and routable addresses be configured simultaneously on the same interface. [STANDARDS-TRACK]

This document specifies the architectural characteristics, expected behavior, textual representation, and usage of IPv6 addresses of different scopes. According to a decision in the IPv6 working group, this document intentionally avoids the syntax and usage of unicast site-local addresses. [STANDARDS-TRACK]

This document lists the various Voice Profile for Internet Mail (VPIM) email address formats that are currently in common use and defines several new address formats for special case usage. Requirements are imposed on the formats of addresses used in VPIM submission mode. [STANDARDS-TRACK]

The 6bone was established in 1996 by the IETF as an IPv6 Testbed network to enable various IPv6 testing as well as to assist in the transitioning of IPv6 into the Internet. It operates under the IPv6 address allocation 3FFE::/16 from RFC 2471. As IPv6 is beginning its production deployment it is appropriate to plan for the phaseout of the 6bone. This document establishes a plan for a multi-year phaseout of the 6bone and its address allocation on the assumption that the IETF is the appropriate place to determine this. This document obsoletes RFC 2471, "IPv6 Testing Address Allocation", December, 1998. RFC 2471 will become historic. This memo provides information for the Internet community.

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-TRACK]

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.

This document provides an update on the "H ratio" defined in RFC 1715. It defines a new ratio which the authors claim is easier to understand. This memo provides information for the Internet community.

This document examines the general framework of Realm Specific IP (RSIP). RSIP is intended as a alternative to NAT in which the end-to- end integrity of packets is maintained. We focus on implementation issues, deployment scenarios, and interaction with other layer-three protocols. This memo defines an Experimental Protocol for the Internet community.

This document proposes mechanisms that enable Realm Specific IP (RSIP) to handle end-to-end IPsec (IP Security). This memo defines an Experimental Protocol for the Internet community.

This document contains an SLP service type template that describes the advertisements made by RSIP servers for their services. This memo defines an Experimental Protocol for the Internet community.

This document introduces the concept of Virtual Local Area Network (VLAN) aggregation as it relates to IPv4 address allocation. This memo provides information for the Internet community.

This document describes the administrative procedures for networks seeking to connect to the global Internet. This memo provides information for the Internet community.

This document describes a signaling method and protocol for RSVP-based admission control over IEEE 802-style LANs. [STANDARDS-TRACK]

This document discusses and defines a number of tests that may be used to describe the performance characteristics of a network interconnecting device. In addition to defining the tests this document also describes specific formats for reporting the results of the tests. This memo provides information for the Internet community.

This memo documents MAPOS 16, a multiple access protocol for transmission of network-protocol datagrams, encapsulated in HDLC frames with 16 bit addressing, over SONET/SDH. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

The main purpose of this note is to clarify the current interpretation of the 32-bit IP version 4 address space, whose significance has changed substantially since it was originally defined. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

We discuss the issue of mobility in Nimrod. While a mobility solution is not part of the Nimrod architecture, Nimrod does require that the solution have certain characteristics. We identify the requirements that Nimrod has of any solution for mobility support. We also classify and compare existing approaches for supporting mobility within an internetwork and discuss their advantages and disadvantages. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This document describes a possible experiment with geographic addresses. It uses several specific IP addresses and domain names in the discussion as concrete examples to aid in understanding the concepts. This memo defines an Experimental Protocol for the Internet community.

This paper proposes a new scheme which I believe is a good medium term solution to the routing and address problems of the internet. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This memo documents some experiences with the RFC 1797 [1] subnet A experiment (performed by the Net39 Test Group (see credits)) and provides a number of recommendations on future direction for both the Internet Registries and the Operations community. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This memo clarifies issues surrounding subnetting IP networks by providing a standard subnet table. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

The IPv6 address space will be managed by the IANA for the good of the Internet community, with advice from the IAB and the IESG, by delegation to the regional registries. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This document provides an architecture for allocating IPv6 [1] unicast addresses in the Internet. This document provides information for the Internet community. This memo does not specify an Internet standard of any kind.

The IAB suggests that while RFC 1597 establishes reserved IP address space for the use of private networks which are isolated and will remain isolated from the Internet, any enterprise which anticipates external connectivity to the Internet should apply for a globally unique address from an Internet registry or service provider. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

There appears to be some interest in experimenting with subnetting the class A addresses. It is suggested that conducting an experiment now to identify and fix any software that does not properly handle subnetted class A addresses would be useful and important. This document defines an Experimental Protocol for the Internet community. This does not specify an Internet standard of any kind.

This memo examines some of the issues associated with the current management practices of the Internet IPv4 address space, and examines the potential outcomes of these practices as the unallocated address pool shrinks in size. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This document presents the requirements that the Nimrod routing and addressing architecture has upon the internetwork layer protocol. To be most useful to Nimrod, any protocol selected as the IPng should satisfy these requirements. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This document was submitted to the IETF IPng area in response to RFC 1550. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This memo summarizes issues surrounding the routing and addressing scaling problems in the IP architecture, and it provides a brief background of the ROAD group and related activities in the Internet Engineering Task Force (IETF). This memo provides information for the Internet community. It does not specify an Internet standard.

This RFC suggests a change in the method of specifying the IP address to add new classes of networks to be called F, G, H, and K, to reduce the amount of wasted address space, and to increase the available IP address number space, especially for smaller organizations or classes of connectors that do not need or do not want a full Class C IP address. This memo provides information for the Internet community. It does not specify an Internet standard.

This paper describes a simple proposal which provides a long-term solution to Internet addressing, routing, and scaling. This memo provides information for the Internet community. It does not specify an Internet standard.

This RFC presents a solution to problem of address space exhaustion in the Internet. It proposes a two-tier address structure for the Internet. This is an "idea" paper and discussion is strongly encouraged. This memo provides information for the Internet community. It does not specify an Internet standard.

This memo suggests a new procedure for assigning subnet numbers. Use of this assignment technique within a network would be a purely local matter, and would not effect other networks. This memo provides information for the Internet community. It does not specify an Internet standard.

This RFC describes the use of the Address Resolution Protocol (ARP) by subnet gateways to permit hosts on the connected subnets to communicate without being aware of the existence of subnets, using the technique of "Proxy ARP".

This RFC is a draft working document of the ANSI "Guidelines for the Specification of the Structure of the Domain Specific Part (DSP) of the ISO Standard NSAP Address". It provides guidance to private address administration authorities on preferred formats and semantics for the Domain Specific Part (DSP) of an NSAP address. This RFC specifies the way in which the DSP may be constructed so as to facilitate efficient address assignment. This RFC is for informational purposes only and its distribution is unlimited and does not specify a standard of the ARPA-Internet.

This memo discusses the utility of "subnets" of Internet networks, which are logically visible sub-sections of a single Internet network. For administrative or technical reasons, many organizations have chosen to divide one Internet network into several subnets, instead of acquiring a set of Internet network numbers. This memo specifies procedures for the use of subnets. These procedures are for hosts (e.g., workstations). The procedures used in and between subnet gateways are not fully described. Important motivation and background information for a subnetting standard is provided in RFC-940. This RFC specifies a protocol for the ARPA-Internet community. If subnetting is implemented it is strongly recommended that these procedures be followed.

This RFC describes the extension of a network's broadcast domain to include more than one physical network through the use of a broadcast packet repeater.

Several sites now contain a complex of local links connected to the Internet via a gateway. The details of the internal connectivity are of little interest to the rest of the Internet. One way of organizing these local complexes of links is to use the same strategy as the Internet uses to organize networks, that is, to declare each link to be an entity (like a network) and to interconnect the links with devices that perform routing functions (like gateways). This general scheme is called subnetting, the individual links are called subnets, and the connecting devices are called subgateways (or bridges, or gateways). This RFC discusses standardizing the protocol used in subnetted environments in the ARPA-Internet.

This Addendum to the Network Service Definition Standard, ISO 8348, defines the abstract syntax and semantics of the Network Address (Network Service Access Point Address). The Network Address defined in this Addendum is the address that appears in the primitives of the connection-mode Network Service as the calling address, called address, and responding address parameters, and in the primitives of the connectionless-mode Network Service as the source address and destination address parameters. This document is distributed as an RFC for information only. It does not specify a standard for the ARPA-Internet.

There have been several proposals for schemes to allow the use of a single Internet network number to refer to a collection of physical networks under common administration which are reachable from the rest of the Internet by a common route. Such schemes allow a simplified view of an otherwise complicated topology from hosts and gateways outside of this collection. They allow the complexity of the number and type of these networks, and routing to them, to be localized. Additions and changes in configuration thus cause no detectable change, and no interruption of service, due to slow propagation of routing and other information outside of the local environment. These schemes also simplify the administration of the network, as changes do not require allocation of new network numbers for each new cable installed. This proposal discusses an alternative scheme, one that has been in use at the University of California, Berkeley since April 1984. This RFC suggests a proposed protocol for the ARPA-Internet community, and requests discussion and suggestions for improvements.

This RFC proposes an alternative addressing scheme for subnets which, in most cases, requires no modification to host software whatsoever. The drawbacks of this scheme are that the total number of subnets in any one network are limited, and that modification is required to all gateways.

This memo discusses subnets and proposes procedures for the use of subnets, including approaches to solving the problems that arise, particularly that of routing. A subnet of an Internet network is a logically visible sub-section of a single Internet network. For administrative or technical reasons, many organizations have chosen to divide one Internet network into several subnets, instead of acquiring a set of Internet network numbers. This RFC suggests a proposed protocol for the ARPA-Internet community, and requests discussion and suggestions for improvements.

This RFC proposes simple rules for broadcasting Internet datagrams on local networks that support broadcast, for addressing broadcasts, and for how gateways should handle them. This RFC suggests a proposed protocol for the ARPA-Internet community, and requests discussion and suggestions for improvements.

We propose simple rules for broadcasting Internet datagrams on local networks that support broadcast, for addressing broadcasts, and for how gateways should handle them. This RFC suggests a proposed protocol for the ARPA-Internet community, and requests discussion and suggestions for improvements.

This RFC specifies a draft standard for the ARPA Internet community. It describes a resource location protocol for use in the ARPA Internet. It is most useful on networks employing technologies which support some method of broadcast addressing, however it may also be used on other types of networks. For maximum benefit, all hosts which provide significant resources or services to other hosts on the Internet should implement this protocol. Hosts failing to implement the Resource Location Protocol risk being ignored by other hosts which are attempting to locate resources on the Internet.

The purpose of this note is to describe the CRONUS Virtual Local Network, especially the addressing related features. These features include a method for mapping between Internet Addresses and Local Network addresses. This is a topic of current concern in the ARPA Internet community. This note is intended to stimulate discussion. This is not a specification of an Internet Standard.