Chapter 128 Sflow Monitoring Technology; Sflow Technology—Overview; An Ex Series Switch; Series Switches - Juniper JUNOS OS 10.3 - SOFTWARE Manual

CHAPTER 128
sFlow Monitoring Technology
sFlow Technology—Overview
Understanding How to Use sFlow Technology for Network Monitoring on an EX Series Switch
Sampling Mechanism and Architecture of sFlow Technology on EX Series Switches
Copyright © 2010, Juniper Networks, Inc.
sFlow Technology—Overview on page 3577
Example: sFlow Technology Configuration on page 3579
Configuring sFlow Technology on page 3584
Configuration Statements for sFlow Technology on page 3585
Operational Mode Commands for sFlow Technology on page 3598
Understanding How to Use sFlow Technology for Network Monitoring on an EX Series
Switch on page 3577
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 3577
Adaptive Sampling on page 3578
sFlow Agent Address Assignment on page 3579
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,
3577