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InMon Corporation's sFlow: A Method for Monitoring Traffic in Switched and Routed Networks (RFC3176)

IP.com Disclosure Number: IPCOM000005376D
Original Publication Date: 2001-Sep-01
Included in the Prior Art Database: 2001-Sep-17
Document File: 32 page(s) / 60K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Phaal: AUTHOR [+3]

Abstract

This memo defines InMon Coporation's sFlow system. sFlow is a technology for monitoring traffic in data networks containing switches and routers. In particular, it defines the sampling mechanisms implemented in an sFlow Agent for monitoring traffic, the sFlow MIB for controlling the sFlow Agent, and the format of sample data used by the sFlow Agent when forwarding data to a central data collector.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group P. Phaal Request for Comments: 3176 S. Panchen Category: Informational N. McKee

InMon Corp. September 2001

InMon Corporation's sFlow: A Method for Monitoring Traffic in

Switched and Routed Networks

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2001). All Rights Reserved.

Abstract

This memo defines InMon Coporation's sFlow system. sFlow is a technology for monitoring traffic in data networks containing switches and routers. In particular, it defines the sampling mechanisms implemented in an sFlow Agent for monitoring traffic, the sFlow MIB for controlling the sFlow Agent, and the format of sample data used by the sFlow Agent when forwarding data to a central data collector.

Table of Contents

1. Overview ..................................................... 2 2. Sampling Mechanisms .......................................... 2 2.1 Sampling of Switched Flows ............................... 3 2.1.1 Distributed Switching .............................. 4

2.1.2 Random Number Generation ........................... 4

2.2 Sampling of Network Interface Statistics ................. 4 3. sFlow MIB .................................................... 5 3.1 The SNMP Management Framework ............................ 5

3.2 Definitions .............................................. 6 4. sFlow Datagram Format ........................................ 14 5. Security Considerations ...................................... 25 5.1 Control .................................................. 26 5.2 Transport ................................................ 26

5.3 Confidentiality .......................................... 26 6. References ................................................... 27 7. Authors' Addresses ........................................... 29

Phaal, et al. Informational [Page 1]

RFC 3176 InMon Corporation's sFlow September 2001

8. Intellectual Property Statement .............................. 30 9. Full Copyright Statement ..................................... 31

1. Overview

sFlow is a technology for monitoring traffic in data networks containing switches and routers. In particular, it defines the sampling mechanisms implemented in an sFlow Agent for monitoring traffic, the sFlow MIB for controlling the sFlow Agent, and the format of sample data used by the sFlow Agent when forwarding data to a central data collector.

The architecture and sampling techniques used in the sFlow monitoring system are designed to provide continuous site-wide (and network- wide) traffic monitoring for high speed switched and routed networks.

The design specifically addresses issues associated with:

o Accurat...