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Standard for the transmission of IP datagrams on avian carriers (RFC1149)

IP.com Disclosure Number: IPCOM000001960D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 2 page(s) / 3K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Waitzman: AUTHOR

Abstract

Status of this Memo

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 100% of the total text.

Network Working Group D. Waitzman

Request for Comments: 1149 BBN STC

1 April 1990

A Standard for the Transmission of IP Datagrams on Avian Carriers

Status of this Memo

This memo describes an experimental method for the encapsulation of

IP datagrams in avian carriers. This specification is primarily

useful in Metropolitan Area Networks. This is an experimental, not

recommended standard. Distribution of this memo is unlimited.

Overview and Rational

Avian carriers can provide high delay, low throughput, and low

altitude service. The connection topology is limited to a single

point-to-point path for each carrier, used with standard carriers,

but many carriers can be used without significant interference with

each other, outside of early spring. This is because of the 3D ether

space available to the carriers, in contrast to the 1D ether used by

IEEE802.3. The carriers have an intrinsic collision avoidance

system, which increases availability. Unlike some network

technologies, such as packet radio, communication is not limited to

line-of-sight distance. Connection oriented service is available in

some cities, usually based upon a central hub topology.

Frame Format

The IP datagram is printed, on a small scroll of paper, in

hexadecimal, with each octet separated by whitestuff and blackstuff.

The scroll of paper is wrapped around one leg of the avian carrier.

A band of duct tape is used to secure the datagram's edges. The

bandwidth is limited to the leg length. The MTU is variable, and

paradoxically, generally increases with increased carrier age. A

typical MTU is 256 milligrams. Some datagram padding may be needed.

Upon receipt, the duct tape is removed and the paper copy of the

datagram is optically scanned into a electronically transmittable

form.

Discussion

Multiple types of service can be provided with a prioritized pecking

order. An additional property is built-in worm detection and

eradication. Because IP only guarantees best effort delivery, loss

of a carrier can be tolerated. With time, the carriers are self-

regenerating. While broadcasting is not specified, storms can cause

data loss. There is persistent delivery retry, until the carrier

drops. Audit trails are automatically generated, and can often be

found on logs and cable trays.

Security Considerations

Security is not generally a problem in normal operation, but special

measures must be taken (such as data encryption) when avian carriers

are used in a tactical environment.

Author's Address

David Waitzman

BBN Systems and Technologies Corporation

BBN Labs Division

10 Moulton Street

Cambridge, MA 02238

Phone: (617) 873-4323

EMail: dwaitzman@BBN.COM