Flow Aggregation for the IP Flow Information Export (IPFIX) Protocol
RFC 7015
| Document | Type |
RFC - Proposed Standard
(September 2013; No errata)
Was draft-ietf-ipfix-a9n (ipfix WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-trammell-ipfix-a9n | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | Adrian Farrel | ||
| IESG | IESG state | RFC 7015 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Joel Jaeggli | ||
| IESG note | Nevil Brownlee (n.brownlee@auckland.ac.nz) is the document shepherd. | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) B. Trammell
Request for Comments: 7015 ETH Zurich
Category: Standards Track A. Wagner
ISSN: 2070-1721 Consecom AG
B. Claise
Cisco Systems, Inc.
September 2013
Flow Aggregation for the IP Flow Information Export (IPFIX) Protocol
Abstract
This document provides a common implementation-independent basis for
the interoperable application of the IP Flow Information Export
(IPFIX) protocol to the handling of Aggregated Flows, which are IPFIX
Flows representing packets from multiple Original Flows sharing some
set of common properties. It does this through a detailed
terminology and a descriptive Intermediate Aggregation Process
architecture, including a specification of methods for Original Flow
counting and counter distribution across intervals.
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/rfc7015.
Trammell, et al. Standards Track [Page 1]
RFC 7015 IPFIX Aggregation September 2013
Copyright Notice
Copyright (c) 2013 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.
Table of Contents
1. Introduction ....................................................3
1.1. IPFIX Protocol Overview ....................................4
1.2. IPFIX Documents Overview ...................................5
2. Terminology .....................................................5
3. Use Cases for IPFIX Aggregation .................................7
4. Architecture for Flow Aggregation ...............................8
4.1. Aggregation within the IPFIX Architecture ..................8
4.2. Intermediate Aggregation Process Architecture .............12
4.2.1. Correlation and Normalization ......................14
5. IP Flow Aggregation Operations .................................15
5.1. Temporal Aggregation through Interval Distribution ........15
5.1.1. Distributing Values across Intervals ...............16
5.1.2. Time Composition ...................................18
5.1.3. External Interval Distribution .....................19
5.2. Spatial Aggregation of Flow Keys ..........................19
5.2.1. Counting Original Flows ............................21
5.2.1. Counting Distinct Key Values .......................22
5.3. Spatial Aggregation of Non-key Fields .....................22
5.3.1. Counter Statistics .................................22
5.3.2. Derivation of New Values from Flow Keys and
Non-key fields .....................................23
5.4. Aggregation Combination ...................................23
6. Additional Considerations and Special Cases in Flow
Aggregation ....................................................24
6.1. Exact versus Approximate Counting during Aggregation ......24
6.2. Delay and Loss Introduced by the IAP ......................24
6.3. Considerations for Aggregation of Sampled Flows ...........24
6.4. Considerations for Aggregation of Heterogeneous Flows .....25
7. Export of Aggregated IP Flows Using IPFIX ......................25
7.1. Time Interval Export ......................................25
7.2. Flow Count Export .........................................25
7.2.1. originalFlowsPresent ...............................26
Trammell, et al. Standards Track [Page 2]
RFC 7015 IPFIX Aggregation September 2013
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