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Additional Snoop Datalink Types. K. Sarcar. June 2004. RFC3827. (Format: TXT=6344 bytes) (Status: INFORMATIONAL) (DOI: 10.17487 / RFC3827)


 Network Working Group                                          K. Sarcar
Request for Comments: 3827                        Sun Microsystems, Inc.
Category: Informational                                        June 2004
                    Additional Snoop Datalink Types
Status of this Memo
   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.
Copyright Notice
   Copyright (C) The Internet Society (2004).
Abstract
   The snoop file format provides a way to store and exchange datalink
   layer packet traces.  This document describes extensions to this file
   format to support new media.
1.  Introduction
   [RFC1761] defines the snoop file format used to store captured
   network packets for tools that capture, display, and interpret
   network traffic.  The file format specifies a header containing the
   Datalink Type field that identifies the network's datalink type.
   This document defines new values for this field, as well as an IANA
   registry for future datalink types.
2.  New Datalink Types
   In addition to the Datalink Type codes listed in [RFC1761], this
   document defines 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].
Sarcar                       Informational                      [Page 1]

RFC 3827            Additional Snoop Datalink Types            June 2004
3.  IANA Considerations
   This document created a new IANA registry named "Snoop Datalink
   Types" to hold the various possible 32-bit (4 octet) snoop datalink
   types.  This new registry holds the values previously defined in
   [RFC1761] and tabulated below:
             Datalink Type           Code
             -------------           ----
             IEEE 802.3              0
             IEEE 802.4 Token Bus    1
             IEEE 802.5 Token Ring   2
             IEEE 802.6 Metro Net    3
             Ethernet                4
             HDLC                    5
             Character Synchronous   6
             IBM Channel-to-Channel  7
             FDDI                    8
             Other                   9
   Additionally, the new registry also holds the values defined above in
   section 2 of this document.
   All new allocations and assignments to this registry starting from
   code 27 will follow the First Come First Served policy outlined in
   [BCP0026].  Type codes up to 26 not defined by this section of the
   document (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 document.
6.  References
6.1.  Normative References
   [RFC1761] Callaghan, B. and R. Gilligan, "Snoop Version 2 Packet
             Capture File Format", RFC 1761, February 1995.
Sarcar                       Informational                      [Page 2]

RFC 3827            Additional Snoop Datalink Types            June 2004
   [BCP0026] Narten, T. and H. Alvestrand, "Guidelines for Writing an
             IANA Considerations Section in RFCs", BCP 26, RFC 2434,
             October 1998.
6.2.  Informative References
   [IPoIB]   Kashyap, V. and H.K. Chu, "IP encapsulation and address
             resolution over InfiniBand networks", Work in Progress,
             April 2003.
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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RFC 3827            Additional Snoop Datalink Types            June 2004
8.  Full Copyright Statement
   Copyright (C) The Internet Society (2004).  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.
Intellectual Property
   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.
   Copies of IPR disclosures made to the IETF Secretariat and any
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   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.
   The IETF invites any interested party to bring to its attention any
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Acknowledgement
   Funding for the RFC Editor function is currently provided by the
   Internet Society.
Sarcar                       Informational                      [Page 4] 


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