Network Working Group M. Tuexen
Internet-Draft Muenster Univ. of Applied Sciences
Expires: December 28, 2006 K. Morneault
Cisco Systems, Inc.
June 26, 2006
TEI Query Request Number Change
draft-ietf-sigtran-rfc4233update-00.txt
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Abstract
The IUA protocol described in RFC4233 defines the messages type of
TEI Query Request messages as 5. But this number is already used by
the IUA extension DUA described in RFC4129. This document updates
IUA such that the message type of TEI Query Request messages is 8.
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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. Normative References . . . . . . . . . . . . . . . . . . . . . 3
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 5
Intellectual Property and Copyright Statements . . . . . . . . . . 6
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1. Introduction
The IUA protocol described in RFC3057 [2] does not define a TEI Query
Request message. The IUA extension DUA described in RFC4129 [3]
introduces DLC Status messages of type 5, 6, and 7. After that
RFC4233 [4] was published, which updates RFC3057 [2]. This document
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 [4]
2. Conventions
The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
SHOULD NOT, RECOMMENDED, NOT RECOMMENDED, MAY, and OPTIONAL, when
they appear in this document, are to be interpreted as described in
RFC2119 [1].
3. New Message Type of the TEI Query Message
This document updates RFC4233 [4] by introducing the following
change.
TEI Query messages MUST be encoded with a message type of 8 instead
of 5 as described in RFC4233 [4].
4. IANA Considerations
IANA should reserve the message type 8 of Management Messages for TEI
Query Request messages.
5. Security Considerations
This document does not require any security considerations in
addition to the one given in RFC4233 [4].
6. Normative References
[1] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
[2] Morneault, K., Rengasami, S., Kalla, M., and G. Sidebottom,
"ISDN Q.921-User Adaptation Layer", RFC 3057, February 2001.
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[3] 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.
[4] Morneault, K., Rengasami, S., Kalla, M., and G. Sidebottom,
"Integrated Services Digital Network (ISDN) Q.921-User
Adaptation Layer", RFC 4233, January 2006.
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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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