Port Control Protocol (PCP)
RFC 6887
| Document | Type |
RFC - Proposed Standard
(April 2013; Errata)
Was draft-ietf-pcp-base (pcp WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-wing-pcp-base | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6887 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ralph Droms | ||
| IESG note | Dave Thaler (dthaler@microsoft.com) is the document shepherd. | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) D. Wing, Ed.
Request for Comments: 6887 Cisco
Category: Standards Track S. Cheshire
ISSN: 2070-1721 Apple
M. Boucadair
France Telecom
R. Penno
Cisco
P. Selkirk
ISC
April 2013
Port Control Protocol (PCP)
Abstract
The Port Control Protocol allows an IPv6 or IPv4 host to control how
incoming IPv6 or IPv4 packets are translated and forwarded by a
Network Address Translator (NAT) or simple firewall, and also allows
a host to optimize its outgoing NAT keepalive messages.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6887.
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
Wing, et al. Standards Track [Page 1]
RFC 6887 Port Control Protocol (PCP) April 2013
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Deployment Scenarios . . . . . . . . . . . . . . . . . . . 5
2.2. Supported Protocols . . . . . . . . . . . . . . . . . . . 5
2.3. Single-Homed Customer Premises Network . . . . . . . . . . 5
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Relationship between PCP Server and Its PCP-Controlled
Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5. Note on Fixed-Size Addresses . . . . . . . . . . . . . . . . . 10
6. Protocol Design Note . . . . . . . . . . . . . . . . . . . . . 11
7. Common Request and Response Header Format . . . . . . . . . . 13
7.1. Request Header . . . . . . . . . . . . . . . . . . . . . . 14
7.2. Response Header . . . . . . . . . . . . . . . . . . . . . 15
7.3. Options . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.4. Result Codes . . . . . . . . . . . . . . . . . . . . . . . 19
8. General PCP Operation . . . . . . . . . . . . . . . . . . . . 20
8.1. General PCP Client: Generating a Request . . . . . . . . . 21
8.1.1. PCP Client Retransmission . . . . . . . . . . . . . . 22
8.2. General PCP Server: Processing a Request . . . . . . . . . 24
8.3. General PCP Client: Processing a Response . . . . . . . . 25
8.4. Multi-Interface Issues . . . . . . . . . . . . . . . . . . 27
8.5. Epoch . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9. Version Negotiation . . . . . . . . . . . . . . . . . . . . . 29
10. Introduction to MAP and PEER Opcodes . . . . . . . . . . . . . 30
10.1. For Operating a Server . . . . . . . . . . . . . . . . . . 33
10.2. For Operating a Symmetric Client/Server . . . . . . . . . 35
10.3. For Reducing NAT or Firewall Keepalive Messages . . . . . 37
10.4. For Restoring Lost Implicit TCP Dynamic Mapping State . . 38
11. MAP Opcode . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11.1. MAP Operation Packet Formats . . . . . . . . . . . . . . . 40
11.2. Generating a MAP Request . . . . . . . . . . . . . . . . . 43
11.2.1. Renewing a Mapping . . . . . . . . . . . . . . . . . . 44
11.3. Processing a MAP Request . . . . . . . . . . . . . . . . . 44
11.4. Processing a MAP Response . . . . . . . . . . . . . . . . 48
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