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Versions: (draft-tuexen-sigtran-rfc4233update) 00 01 02 RFC 5133

Network Working Group                                          M. Tuexen
Internet-Draft                        Muenster Univ. of Applied Sciences
Updates: 4233 (if approved)                                 K. Morneault
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: May 6, 2008                                    November 3, 2007


                    TEI Query Request Number Change
                draft-ietf-sigtran-rfc4233update-02.txt

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Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   The Integrated Services Digital Network (ISDN) Q.921-User Adaptation
   Layer (IUA) protocol described in RFC4233 defines the messages type
   of Terminal Endpoint Identifier (TEI) Query Request messages as 5.
   But this number is already used by the Digital Private Network
   Signaling System (DPNSS)/Digital Access Signaling System 2 (DASS 2)
   Extensions (DUA) to the IUA Protocol described in RFC4129.  This
   document updates RFC4233 such that the message type of TEI Query



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   Request messages is 8.


Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  New Message Type of the TEI Query Message . . . . . . . . . . . 3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 3
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 3
   7.  Normative References  . . . . . . . . . . . . . . . . . . . . . 4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 4
   Intellectual Property and Copyright Statements  . . . . . . . . . . 5





































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1.  Introduction

   The Integrated Services Digital Network (ISDN) Q.921-User Adaptation
   Layer (IUA) protocol described in [RFC3057] does not define a
   Terminal Endpoint Identifier (TEI) Query Request message.  The
   Digital Private Network Signaling System (DPNSS)/Digital Access
   Signaling System 2 (DASS 2) Extensions (DUA) to the IUA Protocol
   described in [RFC4129] introduces Data Link Connection (DLC) Status
   messages of type 5, 6, and 7.  Then [RFC4233] was published, which
   updates [RFC3057].  [RFC4233] also introduces the TEI Query Request
   message and uses the message type of 5 for it.  This makes it
   impossible to differentiate the DLC Status request from a TEI Query
   Request.

   This document updates [RFC4233].


2.  Conventions

   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 [RFC2119].


3.  New Message Type of the TEI Query Message

   This document updates [RFC4233] by introducing the following change.

   Terminal Endpoint Identifier (TEI) Query messages MUST be encoded
   with a message type of 8 instead of 5 as described in [RFC4233].


4.  IANA Considerations

   IANA should reserve the message type 8 of Management Messages for
   Terminal Endpoint Identifier (TEI) Query Request messages.


5.  Security Considerations

   This document does not require any security considerations in
   addition to the ones given in [RFC4233].


6.  Acknowledgments

   The authors wish to thank Jon Peterson and Christian Vogel for their
   invaluable comments.



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7.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC3057]  Morneault, K., Rengasami, S., Kalla, M., and G.
              Sidebottom, "ISDN Q.921-User Adaptation Layer", RFC 3057,
              February 2001.

   [RFC4129]  Mukundan, R., Morneault, K., and N. Mangalpally, "Digital
              Private Network Signaling System (DPNSS)/Digital Access
              Signaling System 2 (DASS 2) Extensions to the IUA
              Protocol", RFC 4129, September 2005.

   [RFC4233]  Morneault, K., Rengasami, S., Kalla, M., and G.
              Sidebottom, "Integrated Services Digital Network (ISDN)
              Q.921-User Adaptation Layer", RFC 4233, January 2006.


Authors' Addresses

   Michael Tuexen
   Muenster Univ. of Applied Sciences
   Stegerwaldstr. 39
   48565 Steinfurt
   Germany

   Email: tuexen@fh-muenster.de


   Ken Morneault
   Cisco Systems, Inc.
   13615 Dulles Technology Drive
   Herndon, VA  20171
   US

   Phone: +1-703-484-3323
   Email: kmorneau@cisco.com













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Full Copyright Statement

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   Administrative Support Activity (IASA).





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