Chapter 139 Sflow Monitoring Technology; Sflow Technology—Overview; An Ex Series Switch; Series Switches - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

CHAPTER 139
sFlow Monitoring Technology
sFlow Technology—Overview
Understanding How to Use sFlow Technology for Network Monitoring on an EX Series Switch
Copyright © 2010, Juniper Networks, Inc.
sFlow Technology—Overview on page 3871
Example: sFlow Technology Configuration on page 3873
Configuring sFlow Technology on page 3878
Configuration Statements for sFlow Technology on page 3880
Operational Commands for sFlow Technology on page 3893
Understanding How to Use sFlow Technology for Network Monitoring on an EX Series
Switch on page 3871
The sFlow technology is a monitoring technology for high-speed switched or routed
networks. sFlow monitoring technology randomly samples network packets and sends
the samples to a monitoring station. You can configure sFlow technology on a Juniper
Networks EX Series Ethernet Switch to continuously monitor traffic at wire speed on all
interfaces simultaneously.
This topic describes:
Sampling Mechanism and Architecture of sFlow Technology on EX Series
Switches on page 3871
Adaptive Sampling on page 3872
sFlow Agent Address Assignment on page 3873
Sampling Mechanism and Architecture of sFlow Technology on EX Series Switches
sFlow technology uses the following two sampling mechanisms:
Packet-based sampling: Samples one packet out of a specified number of packets
from an interface enabled for sFlow technology.
Time-based sampling: Samples interface statistics at a specified interval from an
interface enabled for sFlow technology.
The sampling information is used to create a network traffic visibility picture. The Junos
operating system (Junos OS) fully supports the sFlow standard described in RFC 3176,
3871