Configuration Examples for sFlow

This section provides sFlow configuration examples.

Networking Requirements

As shown in Figure 1, traffic between network 1 and network 2 is exchanged through device A. Maintenance personnel need to monitor the traffic on interface 2 and devices to identify traffic anomalies and ensure normal operation on network 1.

Figure 1 sFlow network diagram

In this example:

Interface 1 is GE 0/1/1.
Interface 2 is GE 0/1/2.
Interface 3 is GE 0/1/3.

Configuration Roadmap

To configure sFlow, configure device A as an sFlow agent and enable Flow sampling on interface 2 so that the agent collects traffic statistics. The agent encapsulates traffic statistics into sFlow packets and sends the sFlow packets from interface 1 to the sFlow collector. The collector displays the traffic statistics based on information in the received sFlow packets.

The configuration roadmap is as follows:

Assign an IP address to each interface.
Configure sFlow agent and collector information on the device.
Configure flow sampling on interface 2.

Procedure

Assign an IP address to each interface of device A.

<DeviceA> system-view
[~DeviceA]interface GigabitEthernet 0/1/1
[~DeviceA-GigabitEthernet0/1/1]ip address 10.1.10.1 24
[*DeviceA-GigabitEthernet0/1/1]commit
[~DeviceA]interface GigabitEthernet 0/1/2
[~DeviceA-GigabitEthernet0/1/2]ip address 10.1.20.1 24
[*DeviceA-GigabitEthernet0/1/2]commit
[~DeviceA]interface GigabitEthernet 0/1/3
[~DeviceA-GigabitEthernet0/1/3]ip address 10.1.30.1 24
[*DeviceA-GigabitEthernet0/1/3]commit
[~DeviceA-GigabitEthernet0/1/3]quit

Configure sFlow agent and collector information.

# Configure an IP address for an sFlow agent.

[~DeviceA]sflow
[~DeviceA-sflow]sflow agent ip 10.1.10.1
[*DeviceA-sflow]commit

# Configure sFlow collector information.

[~DeviceA-sflow]sflow collector 2
[*DeviceA-sflow-collector-2]commit
[~DeviceA-sflow-collector-2]sflow server ip 10.1.10.2
[*DeviceA-sflow-collector-2]commit
[~DeviceA-sflow-collector-2]quit
[~DeviceA-sflow]quit

Enable sFlow on a specified board.

[~DeviceA]slot 1
[~DeviceA-slot-1]sflow enable
[*DeviceA-slot-1]commit
[*DeviceA-slot-1]quit

Configure flow sampling.

[~DeviceA]interface GigabitEthernet 0/1/2
[~DeviceA-GigabitEthernet0/1/2]sflow flow-sampling collector 2 inbound
[*DeviceA-GigabitEthernet0/1/2]commit
[~DeviceA-GigabitEthernet0/1/2]sflow flow-sampling rate 4000 inbound
[*DeviceA-GigabitEthernet0/1/2]commit
[~DeviceA-GigabitEthernet0/1/2]quit

Verify the configuration.

[~DeviceA]display sflow configuration
sflow
 sflow agent ip 10.1.10.1
 sflow collector 2
  sflow server ip 10.1.10.2
slot 1
 sflow enable
interface GigabitEthernet0/1/2
 sflow flow-sampling collector 2 inbound
 sflow flow-sampling rate 4000 inbound

Configuration Files

Device A configuration file

#
sysname DeviceA
#
interface GigabitEthernet0/1/1
ip address 10.1.10.1 255.255.255.0
#
interface GigabitEthernet0/1/2
ip address 10.1.20.1 255.255.255.0
#
interface GigabitEthernet0/1/3
ip address 10.1.30.1 255.255.255.0
#
sflow
sflow agent ip 10.1.10.1
sflow collector 2
sflow server ip 10.1.10.2
slot 1
sflow enable
#
interface GigabitEthernet0/1/2
sflow flow-sampling collector 2 inbound
sflow flow-sampling rate 4000 inbound
#
return