Network Working Group S. Venaas
Internet-Draft cisco Systems
Intended status: Informational October 25, 2010
Expires: April 28, 2011
A Registry for PIM Message Types
draft-ietf-pim-registry-01.txt
Abstract
This document provides instructions to IANA for the creation of a
registry for PIM message types. It specifies initial content of the
registry based on existing RFCs specifying PIM message types. It
also specifies a procedure for registering new types.
In addition to this, one message type is reserved, and may be used
for a future extension of the message type space.
Status of this Memo
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This Internet-Draft will expire on April 28, 2011.
Copyright Notice
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Initial registry . . . . . . . . . . . . . . . . . . . . . 5
3.2. Assignment of new message types . . . . . . . . . . . . . . 5
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 6
5. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1. Normative References . . . . . . . . . . . . . . . . . . . 7
5.2. Informative References . . . . . . . . . . . . . . . . . . 7
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 8
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1. Introduction
Apart from this document, there is no existing document specifying a
registry for PIM message types. PIM version 1 made use of IGMP
[RFC1112] and there is an IGMP registry [IGMPREG] listing the message
types used by PIM version 1. PIM version 2 however is not based on
IGMP, and a separate PIM message type registry is needed. There are
currently several RFCs specifying new PIM version 2 message types
that should be in this new registry. They are the RFCs for PIM Dense
Mode [RFC3973], PIM Sparse Mode [RFC4601] and Bidirectional PIM
[RFC5015].
This document specifies the initial content of the new PIM message
type registry based on those existing RFCs. This document also
specifies a procedure for registering new PIM message types.
In addition to this, this document reserves one message type. This
type may be used for a future extension of the message type space.
The current message type space is only 4 bits, so it is not unlikely
that this will be needed. How exactly the extension should be done
is left to a future document.
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2. Security Considerations
This document only creates an IANA registry. There may be a security
benefit in a well-known place for finding information on which PIM
message types are valid and how they are used. Apart from that there
are no security considerations.
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3. IANA Considerations
This document requests IANA to create a PIM message type registry.
This should be placed in the "Protocol Independent Multicast (PIM)"
branch of the tree. Each entry in the registry consists of message
type, message name and references to the documents defining the type.
3.1. Initial registry
The initial content of the registry should be as follows.
Type Name Reference
---- ---------------------------------------- ---------------------
0 Hello [RFC3973] [RFC4601]
1 Register [RFC4601]
2 Register Stop [RFC4601]
3 Join/Prune [RFC3973] [RFC4601]
4 Bootstrap [RFC4601]
5 Assert [RFC3973] [RFC4601]
6 Graft [RFC3973]
7 Graft-Ack [RFC3973]
8 Candidate RP Advertisement [RFC4601]
9 State Refresh [RFC3973]
10 DF Election [RFC5015]
15 Reserved (for extension of type space) [this document]
3.2. Assignment of new message types
Assignment of new message types is done according to the "IETF
Review" model, see [RFC5226].
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4. Acknowledgements
Thanks to Toerless Eckert for his suggestion to reserve a type for
future message type space extension.
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5. References
5.1. Normative References
[RFC3973] Adams, A., Nicholas, J., and W. Siadak, "Protocol
Independent Multicast - Dense Mode (PIM-DM): Protocol
Specification (Revised)", RFC 3973, January 2005.
[RFC4601] Fenner, B., Handley, M., Holbrook, H., and I. Kouvelas,
"Protocol Independent Multicast - Sparse Mode (PIM-SM):
Protocol Specification (Revised)", RFC 4601, August 2006.
[RFC5015] Handley, M., Kouvelas, I., Speakman, T., and L. Vicisano,
"Bidirectional Protocol Independent Multicast (BIDIR-
PIM)", RFC 5015, October 2007.
5.2. Informative References
[IGMPREG] IANA, "IGMP Type Numbers", IGMP TYPE NUMBERS - per
RFC3228,
BCP57 http://www.iana.org/assignments/igmp-type-numbers,
June 2005.
[RFC1112] Deering, S., "Host extensions for IP multicasting", STD 5,
RFC 1112, August 1989.
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Author's Address
Stig Venaas
cisco Systems
Tasman Drive
San Jose, CA 95134
USA
Email: stig@cisco.com
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