Port Control Protocol (PCP)
RFC 6887
Document | Type |
RFC - Proposed Standard
(April 2013; Errata)
Was draft-ietf-pcp-base (pcp WG)
|
|
---|---|---|---|
Authors | Dan Wing , Stuart Cheshire , Mohamed Boucadair , Reinaldo Penno , Paul Selkirk | ||
Last updated | 2020-01-21 | ||
Replaces | draft-wing-pcp-base | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata 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 . . . . . . . . . . . . . . . . 48Show full document text