4937
INFORMATIONAL
IANA Considerations for PPP over Ethernet (PPPoE)
Authors: P. Arberg, V. Mammoliti
Date: June 2007
Working Group: NON WORKING GROUP
Stream: IETF
Abstract
This document describes the IANA considerations for the PPP over Ethernet (PPPoE) protocol. This memo provides information for the Internet community.
RFC 4937
INFORMATIONAL
Network Working Group P. Arberg
Request for Comments: 4937 Redback Networks
Category: Informational V. Mammoliti
Cisco Systems
June 2007
<span class="h1">IANA Considerations for PPP over Ethernet (PPPoE)</span>
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This document describes the IANA considerations for the PPP over
Ethernet (PPPoE) protocol.
Table of Contents
<a href="#section-1">1</a>. Introduction ....................................................<a href="#page-2">2</a>
<a href="#section-1.1">1.1</a>. Terminology ................................................<a href="#page-2">2</a>
<a href="#section-1.2">1.2</a>. Specification of Requirements ..............................<a href="#page-2">2</a>
<a href="#section-2">2</a>. IANA Considerations .............................................<a href="#page-2">2</a>
<a href="#section-2.1">2.1</a>. Registration Policies for PPPoE TAG Values .................<a href="#page-2">2</a>
<a href="#section-2.2">2.2</a>. Reserved PPPoE TAG Values ..................................<a href="#page-3">3</a>
<a href="#section-2.3">2.3</a>. Registration Policies for PPPoE Code Fields ................<a href="#page-3">3</a>
<a href="#section-2.4">2.4</a>. Reserved PPPoE Code fields .................................<a href="#page-4">4</a>
<a href="#section-3">3</a>. Security Considerations .........................................<a href="#page-4">4</a>
<a href="#section-4">4</a>. References ......................................................<a href="#page-4">4</a>
<a href="#section-4.1">4.1</a>. Normative References .......................................<a href="#page-4">4</a>
<a href="#section-4.2">4.2</a>. Informative References .....................................<a href="#page-4">4</a>
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<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>. Introduction</span>
This document provides guidance to the Internet Assigned Numbers
Authority (IANA) regarding the registration of values related to the
PPP over Ethernet Protocol (PPPoE), defined in [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>], in
accordance with <a href="https://www.rfc-editor.org/bcp/bcp26">BCP 26</a>, [<a href="./rfc2434" title="">RFC2434</a>]. It also reserves PPPoE TAG values
as well as PPPoE packet Code fields, which are or have been in use on
the Internet.
<span class="h3"><a class="selflink" id="section-1.1" href="#section-1.1">1.1</a>. Terminology</span>
The following terms are used here with the meanings defined in <a href="https://www.rfc-editor.org/bcp/bcp26">BCP</a>
<a href="https://www.rfc-editor.org/bcp/bcp26">26</a>: "name space", "registration".
The following policies are used here with the meanings defined in <a href="https://www.rfc-editor.org/bcp/bcp26">BCP</a>
<a href="https://www.rfc-editor.org/bcp/bcp26">26</a>: "First Come First Served".
<span class="h3"><a class="selflink" id="section-1.2" href="#section-1.2">1.2</a>. Specification of Requirements</span>
In this document, several words are used to signify the requirements
of the specification. These words are often capitalized. 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 [<a href="./rfc2119" title=""Key words for use in RFCs to Indicate Requirement Levels"">RFC2119</a>].
<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>. IANA Considerations</span>
The PPPoE protocol, as defined in [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>], defines two name spaces
that require registration, the PPPoE TAG and the PPPoE Code field.
<span class="h3"><a class="selflink" id="section-2.1" href="#section-2.1">2.1</a>. Registration Policies for PPPoE TAG Values</span>
IANA has set up a registry of "PPPoE TAG Values". These are 16-bit
values. PPPoE TAG values already in use are specified as reserved in
this document. All other TAG values between 0 and 65535 are to be
assigned by IANA, using the "First Come First Served" policy defined
in [<a href="./rfc2434" title="">RFC2434</a>].
A TAG-Name and a description for the usage, as well as a point of
contact, MUST be provided for any assignment from this registry. A
document reference SHOULD also be provided.
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<span class="h3"><a class="selflink" id="section-2.2" href="#section-2.2">2.2</a>. Reserved PPPoE TAG Values</span>
TAG Value TAG Name Tag Description Reference
----------- ------------------- --------------------- ---------
0 0x0000 End-Of-List See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
257 0x0101 Service-Name See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
258 0x0102 AC-Name See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
259 0x0103 Host-Uniq See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
260 0x0104 AC-Cookie See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
261 0x0105 Vendor-Specific See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
262 0x0106 Credits See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
263 0x0107 Metrics See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
264 0x0108 Sequence Number See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
272 0x0110 Relay-Session-Id See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
273 0x0111 HURL See the reference [<a href="#ref-CARREL" title=""Extensions to a Method for Transmitting PPP Over Ethernet (PPPoE)"">CARREL</a>]
274 0x0112 MOTM See the reference [<a href="#ref-CARREL" title=""Extensions to a Method for Transmitting PPP Over Ethernet (PPPoE)"">CARREL</a>]
288 0x0120 PPP-Max-Payload See the reference [<a href="./rfc4638" title=""Accommodating a Maximum Transit Unit/Maximum Receive Unit (MTU/MRU) Greater Than 1492 in the Point-to-Point Protocol over Ethernet (PPPoE)"">RFC4638</a>]
289 0x0121 IP_Route_Add See the reference [<a href="#ref-CARREL" title=""Extensions to a Method for Transmitting PPP Over Ethernet (PPPoE)"">CARREL</a>]
513 0x0201 Service-Name-Error See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
514 0x0202 AC-System-Error See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
515 0x0203 Generic-Error See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
<span class="h3"><a class="selflink" id="section-2.3" href="#section-2.3">2.3</a>. Registration Policies for PPPoE Code Fields</span>
IANA has set up a registry of PPPoE Active Discovery Code fields.
These are 8-bit values. PPPoE Code fields already in use are
specified as reserved in this document. All other Code values
between 0 and 255 are to be assigned by IANA, using the "First Come
First Served" policy defined in [<a href="./rfc2434" title="">RFC2434</a>].
A PPPoE Active Discovery packet name and a description for the usage,
as well as a point of contact, MUST be provided for any assignment
from this registry.
A document reference SHOULD also be provided.
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<span class="h3"><a class="selflink" id="section-2.4" href="#section-2.4">2.4</a>. Reserved PPPoE Code fields</span>
Code PPPoE Packet Name Description Reference
-------- ----------------------------- ----------------- ---------
0 0x00 PPP Session Stage See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
7 0x07 PADO, Offer See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
9 0x09 PADI, Initiation See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
10 0x0a PADG, Session-Grant See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
11 0x0b PADC, Session-Credit Response See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
12 0x0c PADQ, Quality See the reference [<a href="./rfc4938" title=""PPP Over Ethernet (PPPoE) Extensions for Credit Flow and Link Metrics"">RFC4938</a>]
25 0x19 PADR, Request See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
101 0x65 PADS, Session-confirmation See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
167 0xa7 PADT, Terminate See the reference [<a href="./rfc2516" title=""A Method for Transmitting PPP Over Ethernet (PPPoE)"">RFC2516</a>]
211 0xd3 PADM, Message See the reference [<a href="#ref-CARREL" title=""Extensions to a Method for Transmitting PPP Over Ethernet (PPPoE)"">CARREL</a>]
212 0xd4 PADN, Network See the reference [<a href="#ref-CARREL" title=""Extensions to a Method for Transmitting PPP Over Ethernet (PPPoE)"">CARREL</a>]
<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>. Security Considerations</span>
This document focuses on IANA considerations for the PPPoE protocol,
and as such, should help remove the possibility of the same PPPoE
code field and PPPoE TAG value being used for different
functionalities.
<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>. References</span>
<span class="h3"><a class="selflink" id="section-4.1" href="#section-4.1">4.1</a>. Normative References</span>
[<a id="ref-RFC2119">RFC2119</a>] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", <a href="https://www.rfc-editor.org/bcp/bcp14">BCP 14</a>, <a href="./rfc2119">RFC 2119</a>, March 1997.
[<a id="ref-RFC2434">RFC2434</a>] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", <a href="https://www.rfc-editor.org/bcp/bcp26">BCP 26</a>, <a href="./rfc2434">RFC 2434</a>,
October 1998.
[<a id="ref-RFC2516">RFC2516</a>] Mamakos, L., Lidl, K., Evarts, J., Carrel, D., Simone, D.,
and R. Wheeler, "A Method for Transmitting PPP Over
Ethernet (PPPoE)", <a href="./rfc2516">RFC 2516</a>, February 1999.
<span class="h3"><a class="selflink" id="section-4.2" href="#section-4.2">4.2</a>. Informative References</span>
[<a id="ref-CARREL">CARREL</a>] Carrel D., Simone D., Ho C. and T. Stoner, "Extensions to a
Method for Transmitting PPP Over Ethernet (PPPoE)", Work in
Progress.
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[<a id="ref-RFC4938">RFC4938</a>] Berry, B. and H. Holgate, "PPP Over Ethernet (PPPoE)
Extensions for Credit Flow and Link Metrics", <a href="./rfc4938">RFC 4938</a>,
June 2007.
[<a id="ref-RFC4638">RFC4638</a>] Arberg, P., Kourkouzelis, D., Duckett, M., Anschutz, T.,
and J. Moisand, "Accommodating a Maximum Transit
Unit/Maximum Receive Unit (MTU/MRU) Greater Than 1492 in
the Point-to-Point Protocol over Ethernet (PPPoE)", <a href="./rfc4638">RFC</a>
<a href="./rfc4638">4638</a>, September 2006.
Authors' Addresses
Peter Arberg
Redback Networks, Inc.
300 Holger Way
San Jose, CA 95134
USA
EMail: [email protected]
Vince Mammoliti
Cisco Systems, Inc.
181 Bay Street, Suite 3400
Toronto, Ontario, M5J 2T3
Canada
EMail: [email protected]
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