Internet DRAFT - draft-kashima-ipfix-short-timer
draft-kashima-ipfix-short-timer
IP Flow Information Export S. Kashima
Internet-Draft NTT
Intended status: Standards Track Sep 2011
Expires: March 4, 2012
Information Elements for Short Timer
draft-kashima-ipfix-short-timer-02
Abstract
This document describes Information Elements related to short timer.
They are used by the IP Flow Information Export (IPFIX) protocol for
encoding timer paramerters required for traffic measurment of volume
change in a short time.
Status of this Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on March 4, 2012.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. IPFIX Documents Overview . . . . . . . . . . . . . . . . . 3
2.2. PSAMP Documents Overview . . . . . . . . . . . . . . . . . 4
3. Existing Information Elements . . . . . . . . . . . . . . . . . 4
3.1. Flow Timestamp (IPFIX) . . . . . . . . . . . . . . . . . . 4
3.2. Flow Duration Time (IPFIX) . . . . . . . . . . . . . . . . 5
3.3. Packet Timestamp (PSAMP) . . . . . . . . . . . . . . . . . 5
3.4. Time-based Sampling Parameter (PSAMP) . . . . . . . . . . . 5
3.5. Flow Timer (IPFIX) . . . . . . . . . . . . . . . . . . . . 6
4. New Information Elements . . . . . . . . . . . . . . . . . . . 6
4.1. flowActiveTimeoutMilliseconds . . . . . . . . . . . . . . . 6
4.2. flowIdleTimeoutMilliseconds . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1. Normative References . . . . . . . . . . . . . . . . . . . 7
7.2. Informative References . . . . . . . . . . . . . . . . . . 7
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 8
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1. Introduction
The IPFIX Information Model [RFC5102] defines an extensible list of
Information Elements which may be transmitted by the IPFIX protocol
[RFC5102].
This document lists a series of new Information Elements to update
the IPFIX Information Model, and acts as the persistent publication
medium requested in the IANA considerations section of the IPFIX
Information Model [RFC5102] ("The specification of new IPFIX
Information Elements MUST use the template specified in section 2.1
and MUST be published using a well established and persistent
publication medium").
2. Terminology
IPFIX-specific terminology used in this document is defined in
section 2 of the IPFIX Protocol [RFC5101]. As in the IPFIX Protocol
[RFC5101], these IPFIX-specific terms have the first letter of a word
capitalized when used in this document.
2.1. IPFIX Documents Overview
The IPFIX Protocol [RFC5101] provides network administrators with
access to IP flow information.
The architecture for the export of measured IP flow information out
of an IPFIX exporting process to a collecting process is defined in
the IPFIX Architecture [RFC5470], per the requirements defined in RFC
3917 [RFC3917].
The IPFIX Architecture [RFC5470] specifies how IPFIX Data Records and
Templates are carried via a congestion-aware transport protocol from
IPFIX Exporting Processes to IPFIX Collecting Processes.
IPFIX has a formal description of IPFIX Information Elements, their
name, type and additional semantic information, as specified in the
IPFIX Information Model [RFC5102].
Finally the IPFIX Applicability Statement [RFC5472] describes what
type of applications can use the IPFIX protocol and how they can use
the information provided. It furthermore shows how the IPFIX
framework relates to other architectures and frameworks.
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2.2. PSAMP Documents Overview
The document "A Framework for Packet Selection and Reporting"
[RFC5474], describes the PSAMP framework for network elements to
selectsubsets of packets by statistical and other methods, and to
export a stream of reports on the selected packets to a collector.
The set of packet selection techniques (sampling, filtering, and
hashing) supported by PSAMP are described in "Sampling and Filtering
Techniques for IP Packet Selection" [RFC5475].
The PSAMP protocol [RFC5476] specifies the export of packet
information from a PSAMP Exporting Process to a PSAMP Collecting
Process. Like IPFIX, PSAMP has a formal description of its
information elements, their name, type and additional semantic
information. The PSAMP information model is defined in [RFC5477].
Finally [I-D.ietf-ipfix-psamp-mib] describes the PSAMP Management
Information Base.
3. Existing Information Elements
The following are existing Information Elements related to time stamp
and time duration. Becasue one application of IPFIX is QoS (Quality
of service) monitoring, almost all of them supports units smaller
than seconds. For example, we can use observationTimeMilliseconds
for delay measurements. On the other hand, Information Elements
related to flow timer does not support units smaller than seconds,
but support only unit second.
3.1. Flow Timestamp (IPFIX)
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+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| 21 | flowEndSysUpTime | milliseconds |
| 22 | flowStartSysUpTime | milliseconds |
| 150 | flowStartSeconds | seconds |
| 151 | flowEndSeconds | seconds |
| 152 | flowStartMilliseconds | milliseconds |
| 153 | flowEndMilliseconds | milliseconds |
| 154 | flowStartMicroseconds | microseconds |
| 155 | flowEndMicroseconds | microseconds |
| 156 | flowStartNanoseconds | nanoseconds |
| 157 | flowEndNanoseconds | nanoseconds |
| 158 | flowStartDeltaMicroseconds | microseconds |
| 159 | flowEndDeltaMicroseconds | microseconds |
| 160 | systemInitTimeMilliseconds | milliseconds |
+------+-------------------------------+--------------+
3.2. Flow Duration Time (IPFIX)
+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| 161 | flowDurationMilliseconds | milliseconds |
| 162 | flowDurationMicroseconds | microseconds |
+------+-------------------------------+--------------+
3.3. Packet Timestamp (PSAMP)
+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| 322 | observationTimeSeconds | seconds |
| 323 | observationTimeMilliseconds | milliseconds |
| 324 | observationTimeMicroseconds | microseconds |
| 325 | observationTimeNanoseconds | nanoseconds |
+------+-------------------------------+--------------+
3.4. Time-based Sampling Parameter (PSAMP)
+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| 305 | samplingTimeInterval | microseconds |
| 306 | samplingTimeSpace | microseconds |
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+------+-------------------------------+--------------+
3.5. Flow Timer (IPFIX)
+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| 36 | flowActiveTimeout | seconds |
| 37 | flowIdleTimeout | seconds |
+------+-------------------------------+--------------+
4. New Information Elements
According to a diversification of multimedia application and an
aggregation of server in data center, we are facing to measure bursty
traffic that causes packets loss and delay jitter. In order to
measure bursty traffic with IPFIX/PSAMP, flow timers which are
shorter than one second are required.
The following Information Elements are necessary for enabling the
IPFIX/PSAMP traffic measurment of volume change in a short time.
+------+-------------------------------+--------------+
| ID | Name | Units |
+------+-------------------------------+--------------+
| TBD1 | flowActiveTimeoutMilliseconds | milliseconds |
| TBD2 | flowIdleTimeoutMilliseconds | milliseconds |
+------+-------------------------------+--------------+
4.1. flowActiveTimeoutMilliseconds
Description:
The number of milliseconds after which an active Flow is timed out
anyway, even if there is still a continuous flow of packets.
Abstract Data Type: unsigned16
ElementId: TDB1
Status: current
Units: milliseconds
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4.2. flowIdleTimeoutMilliseconds
Description:
A Flow is considered to be timed out if no packets belonging to
the Flow have been observed for the number of milliseconds
specified by this field.
Abstract Data Type: unsigned16
ElementId: TDB2
Status: current
Units: milliseconds
5. Security Considerations
The recommendations in this document do not introduce any additional
security issues to those already mentioned in [RFC5101] and
[RFC5477].
6. IANA Considerations
This document requires an ElementId assignment to be made by IANA.
7. References
7.1. Normative References
7.2. Informative References
[I-D.ietf-ipfix-psamp-mib]
Dietz, T., Claise, B., and J. Quittek, "Definitions of
Managed Objects for Packet Sampling",
draft-ietf-ipfix-psamp-mib-03 (work in progress),
March 2011.
[RFC3917] Quittek, J., Zseby, T., Claise, B., and S. Zander,
"Requirements for IP Flow Information Export (IPFIX)",
RFC 3917, October 2004.
[RFC5101] Claise, B., "Specification of the IP Flow Information
Export (IPFIX) Protocol for the Exchange of IP Traffic
Flow Information", RFC 5101, January 2008.
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[RFC5102] Quittek, J., Bryant, S., Claise, B., Aitken, P., and J.
Meyer, "Information Model for IP Flow Information Export",
RFC 5102, January 2008.
[RFC5470] Sadasivan, G., Brownlee, N., Claise, B., and J. Quittek,
"Architecture for IP Flow Information Export", RFC 5470,
March 2009.
[RFC5472] Zseby, T., Boschi, E., Brownlee, N., and B. Claise, "IP
Flow Information Export (IPFIX) Applicability", RFC 5472,
March 2009.
[RFC5474] Duffield, N., Chiou, D., Claise, B., Greenberg, A.,
Grossglauser, M., and J. Rexford, "A Framework for Packet
Selection and Reporting", RFC 5474, March 2009.
[RFC5475] Zseby, T., Molina, M., Duffield, N., Niccolini, S., and F.
Raspall, "Sampling and Filtering Techniques for IP Packet
Selection", RFC 5475, March 2009.
[RFC5476] Claise, B., Johnson, A., and J. Quittek, "Packet Sampling
(PSAMP) Protocol Specifications", RFC 5476, March 2009.
[RFC5477] Dietz, T., Claise, B., Aitken, P., Dressler, F., and G.
Carle, "Information Model for Packet Sampling Exports",
RFC 5477, March 2009.
Author's Address
Shingo Kashima
NTT PF Lab.
Midori-Cho 3-9-11
Musashino-shi, Tokyo 180-8585
Japan
Phone: +81 422 59 3894
Email: kashima@nttv6.net
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