IP Flow Information Export (IPFIX) Per Stream Control Transmission Protocol (SCTP) Stream
RFC 6526

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Internet Engineering Task Force (IETF)                         B. Claise
Request for Comments: 6526                                     P. Aitken
Category: Standards Track                                     A. Johnson
ISSN: 2070-1721                                      Cisco Systems, Inc.
                                                                G. Muenz
                                                             TU Muenchen
                                                              March 2012

                 IP Flow Information Export (IPFIX) Per
           Stream Control Transmission Protocol (SCTP) Stream

Abstract

   This document specifies an extension to the specifications in RFC
   5101, IP Flow Information Export (IPFIX), when using the Partial
   Reliability extension of SCTP (PR-SCTP, Partial Reliability Stream
   Control Transmission Protocol).

   When implemented at both the Exporting Process and Collecting
   Process, this method offers several advantages, such as the ability
   to calculate Data Record losses for PR-SCTP per Template, immediate
   export of Template Withdrawal Messages, immediate reuse of Template
   IDs within an SCTP stream, reduced likelihood of Data Record loss,
   and reduced demands on the Collecting Process.  When implemented in
   only the Collecting Process or Exporting Process, then normal IPFIX
   behavior will be seen without all of the additional benefits.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6526.

Claise, et al.               Standards Track                    [Page 1]
RFC 6526                  IPFIX Per SCTP Stream               March 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Claise, et al.               Standards Track                    [Page 2]
RFC 6526                  IPFIX Per SCTP Stream               March 2012

Table of Contents

   1. Introduction ....................................................3
      1.1. Relationship with IPFIX and PSAMP ..........................4
      1.2. Applicability ..............................................5
      1.3. Limitations ................................................5
   2. Terminology .....................................................6
      2.1. Conventions Used in This Document ..........................6
      2.2. IPFIX Documents Overview ...................................6
      2.3. PSAMP Documents Overview ...................................7
   3. IPFIX Protocol Specifications: Limitations and Improvements .....7
      3.1. Data Record Loss Calculated Per Template ...................7
           3.1.1. IPFIX Protocol Specifications: Limitation ...........7
           3.1.2. IPFIX Export Per SCTP Stream: Advantage .............8
      3.2. Immediate Template Withdrawal and Reuse ....................8
           3.2.1. IPFIX Protocol Specifications: Limitation ...........8
           3.2.2. IPFIX Export Per SCTP Stream: Advantages ............9
      3.3. Requirement for Data Set Buffering .........................9
           3.3.1. IPFIX Protocol Specifications: Limitation ...........9
           3.3.2. IPFIX Export Per SCTP Stream: Advantages ...........10
   4. Specifications .................................................10
      4.1. New Information Element ...................................10
      4.2. Template Management .......................................11
      4.3. SCTP ......................................................12
      4.4. Template Withdrawal Message ...............................13
      4.5. The Collecting Process's Side .............................14
           4.5.1. SCTP ...............................................14
           4.5.2. Enabling the Per-SCTP-Stream Extension .............14
           4.5.3. Disabling the Per-SCTP-Stream Extension ............15