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BGP Class of Service Interconnection
draft-knoll-idr-cos-interconnect-12

The information below is for an old version of the document.
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This is an older version of an Internet-Draft whose latest revision state is "Expired".
Author Thomas Martin Knoll
Last updated 2014-05-11
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draft-knoll-idr-cos-interconnect-12
#x27; for those
   prefixes.  Waived prefix specific limitations do not supersede global
   limitations for the respective PHB id Code.  In turn, a withdrawal of
   a global limitation does also withdraw any possibly existing prefix
   specific ones for the respective PHB id Code.

   All limitations have AS local scope for the advertising AS and the
   neighbouring AS might or might not adopt its sending behaviour to
   those advertised limitations.

   Despite the transitive nature of the new attribute, its usage for
   ingress limitation is confined to neighbouring ASes.  Processing of
   the conveyed parameters is only valid for peers, who are peering with
   the AS specified in the ASN field of the attribute.

   The attribute SHOULD NOT be transitively relayed to non-adjacent
   interconnection partners.

4.  Confidentiality Considerations

   The disclosure of confidential AS intrinsic information by means of
   the signalled Basic CoS support is of low key security concern.  The
   disclosure of information through CoS Parameter signalling is more
   detailed.  However, all included parameters are exchanged with direct
   interconnection partners and are the free choice of each AS provider.

5.  IANA Considerations

   This document defines a new BGP Extended Community, which needs to be
   assigned a number by IANA within the Extended Community list.  The
   new CoS Capability is a BGP Extended Community of regular type.  It
   is IANA-assignable (FCFS procedure) and is transitive across ASes.  A
   number assignment application within the numbering range of 0x00-0x3f

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   is made to IANA.

   Note to RFC Editor: this section may be removed on publication as an
   RFC.

   This document defines a new BGP attribute.  This attribute is
   optional and transitive.

6.  Security Considerations

   This extension to BGP does not change the underlying security issues
   inherent in the existing BGP version.

   The signalled attributes are transitive with limited relay operation
   in the CoS Parameter Attribute case.  AS peers, which use egress
   traffic shaper on the signalled limitations SHOULD exhaust all
   available BGP security features to make sure, that the signalled
   limitation is actually sent by the adjacent peer.

7.  References

7.1.  Normative References

   [IEEE]     IEEE, "IEEE Standard for Binary Floating-Point
              Arithmetic", ISBN 1-5593-7653-8, 1985.

   [RFC1997]  Chandrasekeran, R., Traina, P., and T. Li, "BGP
              Communities Attribute", RFC 1997, August 1996.

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

   [RFC2210]  Wroclawski, J., "The Use of RSVP with IETF Integrated
              Services", RFC 2210, September 1997.

   [RFC2215]  Shenker, S. and J. Wroclawski, "General Characterization
              Parameters for Integrated Service Network Elements",
              RFC 2215, September 1997.

   [RFC2597]  Heinanen, J., Baker, F., Weiss, W., and J. Wroclawski,
              "Assured Forwarding PHB Group", RFC 2597, June 1999.

   [RFC3140]  Black, D., Brim, S., Carpenter, B., and F. Le Faucheur,
              "Per Hop Behavior Identification Codes", RFC 3140,
              June 2001.

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   [RFC3246]  Davie, B., Charny, A., Bennet, J., Benson, K., Le Boudec,
              J., Courtney, W., Davari, S., Firoiu, V., and D.
              Stiliadis, "An Expedited Forwarding PHB (Per-Hop
              Behavior)", RFC 3246, March 2002.

   [RFC4271]  Rekhter, Y., Li, T., and S. Hares, "A Border Gateway
              Protocol 4 (BGP-4)", RFC 4271, January 2006.

   [RFC4360]  Sangli, S., Tappan, D., and Y. Rekhter, "BGP Extended
              Communities Attribute", RFC 4360, February 2006.

7.2.  Informative References

   [I-D.knoll-idr-qos-attribute]
              Knoll, T., "BGP Extended Community for QoS Marking",
              draft-knoll-idr-qos-attribute-13 (work in progress),
              January 2014.

   [RFC2475]  Blake, S., Black, D., Carlson, M., Davies, E., Wang, Z.,
              and W. Weiss, "An Architecture for Differentiated
              Services", RFC 2475, December 1998.

   [RFC3662]  Bless, R., Nichols, K., and K. Wehrle, "A Lower Effort
              Per-Domain Behavior (PDB) for Differentiated Services",
              RFC 3662, December 2003.

Author's Address

   Thomas Martin Knoll
   Chemnitz University of Technology

   Email: thomas.m.knoll@gmail.com

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