Internet DRAFT - draft-manral-pce-tcp-port
draft-manral-pce-tcp-port
Network Working Group V. Manral
Internet-Draft Hewlett-Packard Corp.
Intended status: Standards-Track April 17, 2012
Expires: October 20, 2012
Path Computation Element (PCE) Communication Protocol (PCEP) TCP port
number changes
draft-manral-pce-tcp-port-02
Abstract
Path Computation Element (PCE) Communication Protocol (PCEP) defined
in [RFC 5440] states that "All PCEP messages MUST be sent using the
registered TCP port for the source and destination TCP port." This
has however lead to a lot of restrictions for the implementation.
With these considerations in mind this document updates the TCP
behavior.
Requirements Language
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].
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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This Internet-Draft will expire on October 20, 2012.
Copyright Notice
Copyright (c) 2011 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. TCP Port changes . . . . . . . . . . . . . . . . . . . . . . . 3
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 3
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 3
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 3
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1. Introduction
PCEP defined in [RFC 5440] uses TCP as the transport protocol to
transfer all PCEP messages. The PCEP specification states that:
"All PCEP messages MUST be sent using the registered TCP port for the
source and destination TCP port."
However as PCEP can be used as communication between PCEP clients and
servers as well as between servers. This has caused issues in
implementations on various platforms, besides most implementations do
not follow the same behavior. It is with this background that an
alternate reccomendation is given here.
2. TCP Port changes
PCEP listens on PCE TCP port (4189). The restriction of the source port
to be the same has been removed. This allows the requirements of
reliable messaging and flow control to be met without further
protocol work.
The protocol needs to take care that there is only one request from a
particular client, to prevent any DoS attacks, that may occur.
3. IANA Considerations
No new IANA consideration are raised by this document.
4. Security Considerations
This document raises no new security issues.
5. Acknowledgements
PCE group.
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Author's Address
Vishwas Manral
Hewlett-Packard Corp.
191111 Pruneridge Ave.
Cupertino, CA 95014
US
Phone: 408-447-1497
Email: vishwas.manral@hp.com
URI:
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