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Versions: 00 draft-ietf-mpls-iana-rsvp-session-flags

Network Working Group                                      Adrian Farrel
Internet Draft                                        Old Dog Consulting
Category: Informational
Expiration Date: November 2006                                  May 2006



   Codepoint Registry for The Flags Field in the Resource Reservation
     Protocol Traffic Engineering (RSVP-TE) Session Attribute Object


           <draft-farrel-mpls-iana-rsvp-session-flags-00.txt>


Status of this Memo

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Abstract

   This document provides instructions to IANA for the creation of a new
   codepoint registry for the flags field in the Session Attribute
   object of the Resource Reservation Protocol Traffic Engineeging
   (RSVP-TE) signaling messages used in Multiprotocol Label Switching
   (MPLS) and Generalized MPLS (GMPLS) signaling.






A. Farrel                                                       [Page 1]


draft-farrel-mpls-iana-rsvp-session-flags-00.txt                May 2006

1. Introduction

   The Resource Reservation Protocol (RSVP) [RFC2205] has been extended
   as Rsvp for Traffic Engineering (RSVP-TE) for use in Multiprotocol
   Label Switching (MPLS) signaling [RFC3209] and Generalized MPLS
   (GMPLS) [RFC3473].

   [RFC3209] introduced a new signaling object, the Session Attribute
   object, that is carried on the RSVP Path message. The Session
   Attribute object contains an eight-bit field of flags.

   The original specification of RSVP-TE assigned uses to three of
   these bit flags. Subsequent MPLS and GMPLS RFCs have assigned further
   flags.

   There is a need for a codepoint registry to track the use of the bit
   flags in this field, to ensure that bits are not assigned more than
   once, and to define the procedures by which such bits may be
   assigned.

   This document lists the current bit usage and provides information
   for IANA to create a new registry. This document does not define the
   uses of specific bits - definitive procedures for the use of the
   bits can be found in the referenced RFCs.

2. Existing Usage

2.1. RFC 3209

   [RFC3209] defines the use of three bits as follows:

    0x01  Local protection desired

    0x02  Label recording desired

    0x04  SE Style desired

2.2. RFC 4090

   [RFC4090] defines the use of two bits as follows:

    0x08  Bandwidth protection desired

    0x10  Node protection desired







A. Farrel                                                       [Page 2]


draft-farrel-mpls-iana-rsvp-session-flags-00.txt                May 2006

2.3. RFC XXXX
[RFC Editor:
 Please replace XXXX above with the RFC number assigned for
 draft-ietf-ccamp-loose-path-reopt, and make the same change in the
 references.
 Please remove this note prior to publication.]

   [RFCXXXX] defines the use of one bit as follows:

   0x20  Path re-evaluation request

3. Security Considerations

   This informational document exists purely to create an IANA registry.
   Such registries help to protect the IETF process against Denial of
   Service attacks.

   Otherwise there are no security considerations for this document.

4. IANA Considerations

   IANA is requested to create a new codepoint registry as follows.

   The new registry should be placed under the "RSVP-TE Parameters"
   branch of the tree.

   The new registry should be termed "Session Attribute Object Flags."

   Flags from this registry may only be assigned by IETF consensus.

   The registry should reference the flags already defined as described
   in section 2 of this document.

5. Acknowledgements

   Thanks to JP Vasseur and Bill Fenner for reviewing this document.

6. References

6.1 Normative References

   [RFC2205]     Braden, R., Zhang, L., Berson, S., Herzog, S. and
                 S. Jamin, "Resource ReSerVation Protocol (RSVP) --
                 Version 1, Functional Specification", RFC 2205,
                 September 1997.

   [RFC3209]     Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan,
                 V. and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP
                 Tunnels", RFC 3209, December 2001.


A. Farrel                                                       [Page 3]


draft-farrel-mpls-iana-rsvp-session-flags-00.txt                May 2006

   [RFC3473]     Berger, L., Editor, "Generalized Multi-Protocol Label
                 Switching (GMPLS) Signaling - Resource ReserVation
                 Protocol-Traffic Engineering (RSVP-TE) Extensions",
                 RFC 3473, January 2003.

   [RFC4090]     Pan, P., Swallow, G., and Atlas, A., "Fast Reroute
                 Extensions to RSVP-TE for LSP Tunnels", RFC 4090,
                 May 2005.

   [RFCXXXX]     Vasseur, JP., Ikejiri, Y., and Zhang, R.,
                 "Reoptimization of Multiprotocol Label Switching
                 (MPLS) Traffic Engineering (TE) Loosely Routed Label
                 Switch Paths (LSPs)", draft-ietf-ccamp-loose-path-reopt
                 work in progress.

7. Author's Address

   Adrian Farrel
   Old Dog Consulting

   Email: adrian@olddog.co.uk

8. Intellectual Property Consideration

   The IETF takes no position regarding the validity or scope of any
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   at http://www.ietf.org/ipr.

   The IETF invites any interested party to bring to its attention
   any copyrights, patents or patent applications, or other
   proprietary rights that may cover technology that may be required
   to implement this standard.  Please address the information to the
   IETF at ietf-ipr@ietf.org.






A. Farrel                                                       [Page 4]


draft-farrel-mpls-iana-rsvp-session-flags-00.txt                May 2006

9. Full Copyright Statement

   Copyright (C) The Internet Society (2006).  This document is
   subject to the rights, licenses and restrictions contained in BCP
   78, and except as set forth therein, the authors retain all their
   rights.

   This document and the information contained herein are provided
   on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE
   REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND
   THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT
   THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR
   ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
   PARTICULAR PURPOSE.




































A. Farrel                                                       [Page 5]


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