11-Network Management and Monitoring Configuration Examples

02-S12500_sFlow_Configuration_Examples

Chapters Download  (85.77 KB)

02-S12500_sFlow_Configuration_Examples
Title Size Download
02-S12500_sFlow_Configuration_Examples 85.77 KB

Introduction

This document provides Sampled Flow (sFlow) configuration examples.

sFlow is a traffic monitoring technology. It provides the following sampling mechanisms:

·     Flow samplingObtains packet information.

·     Counter sampling—Obtains interface counter information.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of H3C sFlow.

Example: Configuring sFlow

Network requirements

As shown in Figure 1, configure flow sampling and counter sampling on GigabitEthernet 3/0/2 to monitor traffic on the port.

The device sends sFlow packets through GigabitEthernet 3/0/1 to the sFlow collector.

Figure 1 Network diagram

 

Software version used

This configuration example was created and verified on S12500-CMW710-R7129.

Configuration restrictions and guidelines

The device supports only the determine flow sampling mode.

You can configure sFlow only on Ethernet interfaces.

Configuration procedures

1.     Configure IP addresses for interfaces, as shown in Figure 1. (Details not shown.)

2.     On the device, add GigabitEthernet 3/0/1 that connects the sFlow collector to VLAN 30. (Details not shown.)

3.     Configure the sFlow agent and configure information about the sFlow collector:

# Configure the IP address of the sFlow agent. (This example uses the IP address of VLAN-interface 30 as the IP address of the sFlow agent.)

[Device] sflow agent ip 30.0.0.1

# Configure information about the sFlow collector: specify the sFlow collector ID as 1, IP address as 30.0.0.2, UDP port number as 6343 (the default), and description as CLI.

[Device] sflow collector 1 ip 30.0.0.2 description CLI

4.     Configure flow sampling:

# Set the flow sampling mode to determine and sampling rate to 4000.

[Device] interface GigabitEthernet 3/0/2

[Device-GigabitEthernet3/0/2] undo shutdown

[Device-GigabitEthernet3/0/2] sflow sampling-mode determine

[Device-GigabitEthernet3/0/2] sflow sampling-rate 4000

# Specify sFlow collector 1 for flow sampling.

[Device-GigabitEthernet3/0/2] sflow flow collector 1

5.     Configure counter sampling:

# Set the counter sampling interval to 120 seconds.

[Device-GigabitEthernet3/0/2] sflow counter interval 120

# Specify sFlow collector 1 for counter sampling.

[Device-GigabitEthernet3/0/2] sflow counter collector 1

Verifying the configuration

# Display the sFlow configuration and operation information.

[Device] display sflow

sFlow datagram version: 5

Global Information:

Agent        IP:30.0.0.1(CLI)

Source address:

Collector Information:

ID   IP            Port  Aging      Size   VPN-instance   Description

1    30.0.0.2      6343  N/A        1400                  CLI

Port   Information:

Interface       CID Interval(s) FID MaxHLen Rate     Mode        Status

GE3/0/2         1   120         1   128     4000     Determine   Active

The output shows the following:

·     GigabitEthernet 3/0/2 enabled with sFlow is active.

·     The counter sampling interval is 120 seconds (the sFlow agent collects traffic statistics from the port every 120 seconds.

·     The flow sampling rate is 4000 (the sFlow agent samples one packet from every 4000 packets). The sFlow feature operates correctly.

Configuration files

[Device] display current-configuration

#

 sflow agent ip 30.0.0.1

 sflow collector 1 ip 30.0.0.2 description "CLI"

#

vlan 10

#

vlan 20

#

vlan 30 

#

interface Vlan-interface30

 ip address 30.0.0.1 255.255.255.0

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port access vlan 10

 sflow sampling-rate 4000

 sflow flow collector 1

 sflow counter interval 120

 sflow counter collector 1

#

interface GigabitEthernet3/0/1

port link-mode bridge

port access vlan 30

#

Related documentation

·     H3C S12500 Routing Switch Series Network Management and Monitoring Configuration Guide

·     H3C S12500 Routing Switch Series Network Management and Monitoring Command Reference