Network Working Group                                     Kanoj Sarcar
INTERNET-DRAFT                                  Sun Microsystems, Inc.
Expires April 2004                                        October 2003


                    Additional Snoop Datalink Types
                 <draft-sarcar-snoop-new-types-00.txt>

Status of this Memo

   This document is an Internet-Draft and is subject to all provisions
   of Section 10 of RFC2026.

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Abstract

   The snoop file format provides a way to store and exchange
   datalink layer packet traces. The format includes a Datalink Type
   field to indicate the datalink layer technology. This document
   describes extensions to this field.

1. Introduction

   This document defines new values for the Datalink Type field
   described in section 3 of [RFC1761], as well as an IANA registry
   for future types.









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2. New Datalink Types

   In addition to the Datalink Type codes listed in [RFC1761], this
   document advertises the following type codes for the corresponding
   media:

                Datalink Type           Code
                -------------           ----

                Fibre Channel           16
                ATM                     17
                ATM Classical IP        18
                IP over Infiniband      26

   The IP over Infiniband packet format is described in [IPoIB].

3. IANA Considerations

   This document proposes the creation of a new IANA registry
   [IANA_snoop] to hold the various possible 32-bit (4 octet)
   Datalink Types. This new registry will hold the values described
   above in section 2 of this document.

   All new allocations and assignments to the [IANA_snoop] registry
   starting from code 27 will follow the First Come First Served
   policy outlined in [BCP0026]. Type codes upto 26 not listed above
   in section 2 (10-15 and 19-25) are considered reserved.

4. Security Considerations

   The addition of new datalink type codes to the existing file format
   poses no known security risks.

5. Acknowledgements

   The author would like to thank Jim Carlson, Brent Callaghan and
   Bill Strahm for meticulously reviewing this draft.














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6. References

6.1. Normative References

   [RFC1761] B. Callaghan, R. Gilligan, "Snoop Version 2 Packet Capture
             File Format", RFC 1761, February 1995.

   [IPoIB] V. Kashyap, H.K.Jerry Chu, "IP encapsulation and address
           resolution over InfiniBand networks",
           draft-ietf-ipoib-ip-over-infiniband-04.txt, April, 2003.

6.2. Informative References

   [BCP0026] T. Narten, H. Alvestrand, "Guidelines for Writing an IANA
             Considerations Section in RFCs", RFC 2434, October 1998.

   [IANA_snoop] Internet Assigned Numbers Authority, www.iana.org

7. Author's Address

   Kanoj Sarcar
   Sun Microsystems, Inc.
   14 Network Circle
   Bldg 14, MPK14-333
   Menlo Park, CA  94025

   Phone: 1-650-786-4785
   Email: kanoj.sarcar@sun.com

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   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice



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   this standard. Please address the information to the IETF Executive
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   PARTICULAR PURPOSE.



















Sarcar                                                          [Page 4]