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A Method for the Transmission of IPv6 Packets over Ethernet Networks (RFC1972)

IP.com Disclosure Number: IPCOM000004192D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 3 page(s) / 6K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Crawford: AUTHOR

Abstract

This memo specifies the frame format for transmission of IPv6 [IPV6] packets and the method of forming IPv6 link-local addresses on Ethernet networks. It also specifies the content of the Source/Target Link-layer Address option used the the Router Solicitation, Router Advertisement, Neighbor Solicitation, and Neighbor Advertisement messages described in [DISC], when those messages are transmitted on an Ethernet.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 47% of the total text.

Network Working Group M. Crawford

Request for Comments: 1972 Fermilab

Category: Standards Track August 1996

A Method for the Transmission of IPv6 Packets over Ethernet Networks

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.

Introduction

This memo specifies the frame format for transmission of IPv6 [IPV6]

packets and the method of forming IPv6 link-local addresses on

Ethernet networks. It also specifies the content of the

Source/Target Link-layer Address option used the the Router

Solicitation, Router Advertisement, Neighbor Solicitation, and

Neighbor Advertisement messages described in [DISC], when those

messages are transmitted on an Ethernet.

Maximum Transmission Unit

The default MTU size for IPv6 packets on an Ethernet is 1500 octets.

This size may be reduced by a Router Advertisement [DISC] containing

an MTU option which specifies a smaller MTU, or by manual

configuration of each node. If a Router Advertisement is received

with an MTU option specifying an MTU larger than 1500, or larger than

a manually configured value less than 1500, that MTU option must be

ignored.

Frame Format

IPv6 packets are transmitted in standard Ethernet frames. The

ethernet header contains the Destination and Source ethernet

addresses and the ethernet type code, which must contain the value

86DD hexadecimal. The data field contains the IPv6 header followed

immediately by the payload, and possibly padding octets to meet the

minimum frame size for Ethernet.

+-------+-------+-------+-------+-------+-------+ ^

| Destination Ethernet address | |

+-------+-------+-------+-------+-------+-------+ ethernet

| Source Ethernet address | header

+-------+-------+-------+-------+-------+-------+ |

| 86 DD | v

+-------+-------+-------+-------+-------+------+------+

| IPv6 header and payload ... /

+-------+-------+-------+-------+-------+------+------+

Stateless Autoconfiguration and Link-Local Addresses

The address token [CONF] for an Ethernet interface is the interface's

built-in 48-bit IEE...