Media Description for the Internet Key Exchange Protocol (IKE) in the Session Description Protocol (SDP)
RFC 6193
Independent Submission M. Saito
Request for Comments: 6193 NTT Communications
Category: Informational D. Wing
ISSN: 2070-1721 Cisco Systems
M. Toyama
NTT Corporation
April 2011
Media Description for the Internet Key Exchange Protocol (IKE)
in the Session Description Protocol (SDP)
Abstract
This document specifies how to establish a media session that
represents a virtual private network using the Session Initiation
Protocol for the purpose of on-demand media/application sharing
between peers. It extends the protocol identifier of the Session
Description Protocol (SDP) so that it can negotiate use of the
Internet Key Exchange Protocol (IKE) for media sessions in the SDP
offer/answer model. It also specifies a method to boot up IKE and
generate IPsec security associations using a self-signed certificate.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
This is a contribution to the RFC Series, independently of any other
RFC stream. The RFC Editor has chosen to publish this document at
its discretion and makes no statement about its value for
implementation or deployment. Documents approved for publication by
the RFC Editor are not a candidate for any level of Internet
Standard; see 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/rfc6193.
Saito, et al. Informational [Page 1]
RFC 6193 Media Description for IKE in SDP April 2011
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
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents
1. Applicability Statement .........................................3
2. Introduction ....................................................3
2.1. Problem Statement ..........................................4
2.2. Approach to Solution .......................................4
2.3. Alternative Solution under Prior Relationship
between Two Nodes ..........................................6
2.4. Authorization Model ........................................6
2.5. Conventions Used in This Document ..........................6
3. Protocol Overview ...............................................7
4. Protocol Identifiers ............................................8
5. Normative Behavior ..............................................9
5.1. SDP Offer and Answer Exchange ..............................9
5.2. Maintenance and Termination of VPN Session ................10
5.3. Forking ...................................................11
5.4. Port Usage ................................................11
5.5. Multiplexing UDP Messages When Using ICE ..................11
6. Examples .......................................................13
6.1. Example of SDP Offer and Answer Exchange without
IPsec NAT-Traversal .......................................13
6.2. Example of SDP Offer and Answer Exchange with
IPsec NAT-Traversal .......................................14
7. Application to IKE .............................................15
8. Specifications Assuming Prior Relationship between Two Nodes ...16
8.1. Certificates Signed by Trusted Third Party ................16
8.2. Configured Pre-Shared Key .................................16
9. Security Considerations ........................................17
10. IANA Considerations ...........................................19
11. Acknowledgments ...............................................20
12. References ....................................................20
12.1. Normative References .....................................20
12.2. Informative References ...................................21
Saito, et al. Informational [Page 2]
RFC 6193 Media Description for IKE in SDP April 2011
1. Applicability Statement
This document provides information about a deployed use of the
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