draft-ietf-rtfm-new-traffic-flow-07.txt   draft-ietf-rtfm-new-traffic-flow-08.txt 
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Nevil Brownlee Nevil Brownlee
U of Auckland, NZ U of Auckland, NZ
Greg Ruth Greg Ruth
GTE Laboratories, Inc GTE Laboratories, Inc
Waltham, MA USA Waltham, MA USA
S. Stibler S. Stibler
IBM IBM
Hawthorne, NY USA Hawthorne, NY USA
April, 1999
expires expires
October, 1999 December 1999
RTFM Working Group - New Attributes for Traffic Flow Measurement RTFM Working Group - New Attributes for Traffic Flow Measurement
<draft-ietf-rtfm-new-traffic-flow-07.txt> <draft-ietf-rtfm-new-traffic-flow-08.txt>
1. Status of this Memo 1. Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet Draft is a product of the Realtime Traffic Flow
Measurement Working Group of the IETF.
2. Introduction 2. Introduction
The Real-Time Flow Measurement (RTFM) Working Group (WG) has The Real-Time Flow Measurement (RTFM) Working Group (WG) has
developed a system for measuring and reporting information about developed a system for measuring and reporting information about
traffic flows in the Internet. This document explores the definition traffic flows in the Internet. This document explores the definition
of extensions to the flow measurements as currently defined in [1]. of extensions to the flow measurements as currently defined in [1].
The new attributes described in this document will be useful for The new attributes described in this document will be useful for
monitoring network performance and will expand the scope of RTFM monitoring network performance and will expand the scope of RTFM
beyond simple measurement of traffic volumes. A companion document beyond simple measurement of traffic volumes. A companion document
to this draft will be written to define MIB structures for the new to this draft will be written to define MIB structures for the new
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DestASN(115) Autonomous System Number for flow's destination DestASN(115) Autonomous System Number for flow's destination
DestPrefix(116) CIDR width used by router for determining DestPrefix(116) CIDR width used by router for determining
flow's destination network flow's destination network
Some of the above, e.g. SourceASN and DestASN, might sensibly be Some of the above, e.g. SourceASN and DestASN, might sensibly be
allocated attribute numbers below 64, making them part of the 'base' allocated attribute numbers below 64, making them part of the 'base'
RTFM meter attributes. RTFM meter attributes.
To support use of the RTFM meter as an 'Edge Device' for implementing To support use of the RTFM meter as an 'Edge Device' for implementing
Differentiated Services, and/or for metering traffic carried via such Differentiated Services, and/or for metering traffic carried via such
services, two more attributes will be useful: services, one more attribute will be useful:
DSCodePoint(118) DS Code Point (6 bits) for packets in this flow DSCodePoint(118) DS Code Point (6 bits) for packets in this flow
Note that since the DS Code Point is a single field within a packet's Note that since the DS Code Point is a single field within a packet's
IP header, it is not possible to have both Source- and Dest- IP header, it is not possible to have both Source- and Dest-
CodePoint attributes. Possible uses of DSCodePoint include CodePoint attributes. Possible uses of DSCodePoint include
aggregating flows using the same Code Points, and separating flows aggregating flows using the same Code Points, and separating flows
having the same end-point addresses but using different Code Points. having the same end-point addresses but using different Code Points.
6. Security Considerations 6. Security Considerations
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Base," RFC 1757, 1995, and RFC 2021, 1997. Base," RFC 1757, 1995, and RFC 2021, 1997.
[7] Brownlee, N: "Traffic Flow Measurement: Meter MIB", [7] Brownlee, N: "Traffic Flow Measurement: Meter MIB",
RFC 2064, The University of Auckland, January 1997. RFC 2064, The University of Auckland, January 1997.
[8] Maiocchi, S: "NeTraMet & NeMaC for IIS Accounting: User's Guide", [8] Maiocchi, S: "NeTraMet & NeMaC for IIS Accounting: User's Guide",
CEFRIEL, Milan, 5 May 1998. (See also http://www.cefriel.it/ntw) CEFRIEL, Milan, 5 May 1998. (See also http://www.cefriel.it/ntw)
[9] Shenker, S., Partridge, C., Guerin, R.: "Specification of [9] Shenker, S., Partridge, C., Guerin, R.: "Specification of
Guaranteed Quality of Service," RFC 2212, 1997. Guaranteed Quality of Service," RFC 2212, 1997.
Expires October 1999
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