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Transmission of IPv6 Packets over FDDI Networks (RFC2467)

IP.com Disclosure Number: IPCOM000003046D
Original Publication Date: 1998-Dec-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 6 page(s) / 15K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Crawford: AUTHOR

Abstract

This document specifies the frame format for transmission of IPv6 packets and the method of forming IPv6 link-local addresses and statelessly autoconfigured addresses on FDDI networks. It also specifies the content of the Source/Target Link-layer Address option used in Router Solicitation, Router Advertisement, Neighbor Solicitation, Neighbor Advertisement and Redirect messages when those messages are transmitted on an FDDI network.

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

Network Working Group M. Crawford

Request for Comments: 2467 Fermilab

Obsoletes: 2019 December 1998

Category: Standards Track

Transmission of IPv6 Packets over FDDI 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.

Copyright Notice

Copyright (C) The Internet Society (1998). All Rights Reserved.

1. Introduction

This document specifies the frame format for transmission of IPv6

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

statelessly autoconfigured addresses on FDDI networks. It also

specifies the content of the Source/Target Link-layer Address option

used in Router Solicitation, Router Advertisement, Neighbor

Solicitation, Neighbor Advertisement and Redirect messages when those

messages are transmitted on an FDDI network.

This document replaces RFC 2019, "Transmission of IPv6 Packets Over

FDDI", which will become historic.

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",

"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this

document are to be interpreted as described in [RFC 2119].

2. Maximum Transmission Unit

FDDI permits a frame length of 4500 octets (9000 symbols), including

at least 22 octets (44 symbols) of Data Link encapsulation when

long-format addresses are used. Subtracting 8 octets of LLC/SNAP

header, this would, in principle, allow the IPv6 [IPV6] packet in the

Information field to be up to 4470 octets. However, it is desirable

to allow for the variable sizes and possible future extensions of the

MAC header and frame status fields. The default MTU size for IPv6

packets on an FDDI network is therefore 4352 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 received on an FDDI interface has an

MTU option specifying an MTU larger than 4352, or larger than a

manually configured value, that MTU option may be logged to system

management but must be otherwise ignored.

For purposes of this document, information received from DHCP is

considered "manually configured" and the term FDDI includes CDDI.

3. Frame Format