An Architecture for IP Address Allocation with CIDR (RFC1518)
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2019-Feb-13
Internet Society Requests For Comment (RFCs)
Y. Rekhter: AUTHOR [+1]
This paper provides an architecture and a plan for allocating IP addresses in the Internet. This architecture and the plan are intended to play an important role in steering the Internet towards the Address Assignment and Aggregating Strategy. [STANDARDS-TRACK]
Network Working Group Y. Rekhter Request for Comments: 1518 T.J. Watson Research Center, IBM Corp. Category: Standards Track T. Li cisco Systems Editors September 1993
An Architecture for IP Address Allocation with CIDR
Status of this Memo
This RFC specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" for the standardization state and status of this protocol. Distribution of this memo is unlimited.
This paper provides an architecture and a plan for allocating IP addresses in the Internet. This architecture and the plan are intended to play an important role in steering the Internet towards the Address Assignment and Aggregating Strategy outlined in .
The IP address space is a scarce shared resource that must be managed for the good of the community. The managers of this resource are acting as its custodians. They have a responsibility to the community to manage it for the common good.
The global Internet can be modeled as a collection of hosts interconnected via transmission and switching facilities. Control over the collection of hosts and the transmission and switching facilities that compose the networking resources of the global Internet is not homogeneous, but is distributed among multiple administrative authorities. Resources under control of a single administration form a domain. For the rest of this paper, "domain" and "routing domain" will be used interchangeably. Domains that share their resources with other domains are called network service providers (or just providers). Domains that utilize other domain’s resources are called network service subscribers (or just subscribers). A given domain may act as a provider and a subscriber simultaneously.
Rekhter & Li [Page 1]
RFC 1518 CIDR Address Allocation Architecture September 1993
There are two aspects of interest when discussing IP address allocation within the Internet. The first is the set of administrative requirements for obtaining and allocating IP addresses; the second is the technical aspect of such assignments, having largely to do with routing, both within a routing domain (intra-domain routing) and between routing domains (inter-domain routing). This paper focuses on the technical issues.
In the current Internet many routing domains (such as corporate and campus networks) attach to transit networks (such as regionals) in only one or a small number of carefully controlled access points. The former act as subscribers, while the latter act as providers.
The architecture and recommendations provided in this paper are intended for immediate deployment. This paper specifically does not address long-term research issues, such as complex policy-based routing requirements.
Addressing solutions which require substantial changes or constraints on the current topology are not considered.