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IPv6 Jumbograms (RFC2675)

IP.com Disclosure Number: IPCOM000003266D
Original Publication Date: 1999-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 7 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Borman: AUTHOR [+3]

Abstract

A "jumbogram" is an IPv6 packet containing a payload longer than 65,535 octets. This document describes the IPv6 Jumbo Payload option, which provides the means of specifying such large payload lengths. It also describes the changes needed to TCP and UDP to make use of jumbograms.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 19% of the total text.

Network Working Group D. Borman

Request for Comments: 2675 Berkeley Software Design

Obsoletes: 2147 S. Deering

Category: Standards Track Cisco

R. Hinden

Nokia

August 1999

IPv6 Jumbograms

Status of this Memo

This document 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" (STD 1) for the standardization state

and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

Abstract

A "jumbogram" is an IPv6 packet containing a payload longer than

65,535 octets. This document describes the IPv6 Jumbo Payload

option, which provides the means of specifying such large payload

lengths. It also describes the changes needed to TCP and UDP to make

use of jumbograms.

Jumbograms are relevant only to IPv6 nodes that may be attached to

links with a link MTU greater than 65,575 octets, and need not be

implemented or understood by IPv6 nodes that do not support

attachment to links with such large MTUs.

1. Introduction

jumbo (jum'bO),

n., pl. -bos, adj.

-n.

1. a person, animal, or thing very large of its kind.

-adj.

2. very large: the jumbo box of cereal.

[1800-10; orig. uncert.; popularized as the name of a large

elephant purchased and exhibited by P.T. Barnum in 1882]

-- www.infoplease.com

The IPv6 header [IPv6] has a 16-bit Payload Length field and,

therefore, supports payloads up to 65,535 octets long. This document

specifies an IPv6 hop-by-hop option, called the Jumbo Payload option,

that carries a 32-bit length field in order to allow transmission of

IPv6 packets with payloads between 65,536 and 4,294,967,295 octets in

length. Packets with such long payloads are referred to as

"jumbograms".

The Jumbo Payload option is relevant only for IPv6 nodes that may be

attached to links with a link MTU greater than 65,575 octets (that

is, 65,535 + 40, where 40 octets is the size of the IPv6 header).

The Jumbo Payload option need not be implemented or understood by

IPv6 nodes that do not support attachment to links with MTU greater

than 65,575.

On links with configurable MTUs, the MTU must not be configured to a

value greater than 65,575 octets if there are nodes attached to that

link that do not support the Jumbo Payload option and it can not be

guaranteed that the Jumbo Payload option will n...