[Docs] [txt|pdf] [Tracker] [Email] [Nits]

Versions: 00 01 02 03

Network Working Group                   Yakov Rekhter (Juniper Networks)
Internet Draft                         Srihari R. Sangli (Cisco Systems)
Expiration Date: April 2006                Daniel Tappan (Cisco Systems)

             Four-octet AS Specific BGP Extended Community

              draft-rekhter-as4octet-ext-community-00.txt


Status of this Memo

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress".

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


IPR Disclosure Acknowledgement

   By submitting this Internet-Draft, each author represents that any
   applicable patent or other IPR claims of which he or she is aware
   have been or will be disclosed, and any of which he or she becomes
   aware will be disclosed, in accordance with Section 6 of BCP 79.


Abstract

   This document defines a new type of a BGP extended community - four-
   octet AS specific extended community. This community allows to carry
   4 octet autonomous system numbers.










Sangli, Tappan, Rekhter                                       

[Page 1]
Internet Draft draft-rekhter-as4octet-ext-community-00.txt  October 2005


Specification of Requirements

   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 RFC 2119 [RFC2119].


1. Introduction

   This document defines a new type of a BGP ([BGP]) extended community
   ([EXT-COMM]) - four-octet AS specific extended community. This type
   of extended community is similar to the two-octet AS specific
   extended community, except that it can carry a four octets autonomous
   system number.


2. Four-octet AS specific extended community

   This is an extended type with Type Field comprising of 2 octets and
   Value Field comprising of 6 octets.


      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | 0x02 or 0x42  |   Sub-Type    |    Global Administrator       |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     | Global Administrator (cont.)  |    Local Administrator        |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   The value of the high-order octet of this extended type is either
   0x02 or 0x42. The low-order octet of this extended type is used to
   indicate sub-types.

   The Value Field consists of two sub-fields:

      Global Administrator sub-field: 4 octets

         This sub-field contains a 4-octets Autonomous System number
         assigned by IANA.

      Local Administrator sub-field: 2 octets

         The organization identified by Autonomous System number in the
         Global Administrator sub-field, can encode any information in
         this sub-field.  The format and meaning of the value encoded in
         this sub-field should be defined by the sub-type of the



Sangli, Tappan, Rekhter                                       

[Page 2]
Internet Draft draft-rekhter-as4octet-ext-community-00.txt  October 2005


         community.


3. IANA Considerations

   This document defines a class of extended communities called four-
   octet AS specific extended community for which the IANA is to create
   and maintain a registry entitled Four-octet AS Specific Extended Com-
   munity. All the communities in this class are of extended Types.
   Future assignment are to be made using the "First Come First Served"
   policy defined in [RFC2434]. The Type values for the transitive com-
   munities of the two-octet AS specific extended community class are
   0x0200-0x02ff, and for the non-transitive communities of that class
   are 0x4200-0x42ff. Assignments consist of a name and the value.

   This document makes the following assignments for the four-octet AS
   specific extended community:

      Name                                     Type Value
      ----                                     ----------
      four-octet AS specific Route Target       0x0202
      four-octet AS specific Route Origin       0x0203


4. Security Considerations

   All the security considerations for BGP Extended Communities apply
   here.


5. Intellectual Property Considerations

   This section is taken from Section 5 of RFC 3668.

   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
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at



Sangli, Tappan, Rekhter                                       

[Page 3]
Internet Draft draft-rekhter-as4octet-ext-community-00.txt  October 2005


   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.


6. Copyright Notice

   Copyright (C) The Internet Society (2005).

   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.


7. Acknowledgements



8. Normative References

   [BGP-4]   Rekhter, Y., and T. Li, "A Border Gateway Protocol 4
   (BGP-4)", RFC 1771, March 1995.

   [RFC1997] Chandra, R., Traina, P., Li, T., "BGP Communities
   Attribute", RFC1997, August 1996.

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

   [EXT-COMM]  Srihari R. Sangli, Daniel Tappan, Yakov Rekhter, "BGP
   Extended Communities Attribute", work in progress








Sangli, Tappan, Rekhter                                       

[Page 4]
Internet Draft draft-rekhter-as4octet-ext-community-00.txt  October 2005


9. Non-normative References



10. Author Information


   Yakov Rekhter
   Juniper Networks, Inc.
   e-mail: yakov@juniper.net

   Srihari R. Sangli
   Cisco Systems, Inc.
   e-mail: rsrihari@cisco.com

   Dan Tappan
   Cisco Systems, Inc.
   250 Apollo Drive
   Chelmsford, MA 01824
   e-mail: tappan@cisco.com































Sangli, Tappan, Rekhter                                       

[Page 5]


Html markup produced by rfcmarkup 1.107, available from http://tools.ietf.org/tools/rfcmarkup/