TCP and UDP with Bigger Addresses (TUBA), A Simple Proposal for Internet Addressing and Routing (RFC1347)
Original Publication Date: 1992-Jun-01
Included in the Prior Art Database: 2019-Feb-11
Internet Society Requests For Comment (RFCs)
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.
Network Working Group Ross Callon Request for Comments: 1347 DEC June 1992
TCP and UDP with Bigger Addresses (TUBA), A Simple Proposal for Internet Addressing and Routing
Status of the Memo
This memo provides information for the Internet community. It does not specify an Internet standard. Distribution of this memo is unlimited.
The Internet is approaching a situation in which the current IP address space is no longer adequate for global addressing and routing. This is causing problems including: (i) Internet backbones and regionals are suffering from the need to maintain large amounts of routing information which is growing rapidly in size (approximately doubling each year); (ii) The Internet is running out of IP network numbers to assign. There is an urgent need to develop and deploy an approach to addressing and routing which solves these problems and allows scaling to several orders of magnitude larger than the existing Internet. However, it is necessary for any change to be deployed in an incremental manner, allowing graceful transition from the current Internet without disruption of service. 
This paper describes a simple proposal which provides a long-term solution to Internet addressing, routing, and scaling. This involves a gradual migration from the current Internet Suite (which is based on Internet applications, running over TCP or UDP, running over IP) to an updated suite (based on the same Internet applications, running over TCP or UDP, running over CLNP ). This approach is known as "TUBA" (TCP & UDP with Bigger Addresses).
This paper describes a proposal for how transition may be accomplished. Description of the manner in which use of CLNP, NSAP addresses, and related network/Internet layer protocols (ES-IS, IS-IS, and IDRP) allow scaling to a very large ubiquitous worldwide Internet is outside of the scope of this paper.
Originally, it was thought that any practical proposal needed to address the immediate short-term problem of routing information explosion (in addition to the long-term problem of scaling to a worldwide Internet). Given the current problems caused by excessive routing information in IP backbones, this could require older IP-based systems to talk to other older IP-based systems over intervening Internet backbones which did not support IP. This in turn would require either translation of IP packets into
Callon [Page 1]
RFC 1347 TUBA: A Proposal for Addressing and Routing June 1992
CLNP packets and vice versa, or encapsulation of IP packets inside CLNP packets. However, other shorter-term techniques (for example ) have been proposed which will allow the Internet to operate successfully for several years using the current IP address space. This in turn allows more time for IP-to-CLNP migration, which in turn allows for a much simpler migration technique.
The TUBA proposal therefore makes use of a simple long-term migration proposal based on a gradual update of Internet Hosts (to run Internet appl...