Basic NetFlow settings
You can specify basic NetFlow settings in a NetFlow template or on a CPE device. When you configure basic NetFlow settings in a NetFlow template, these settings are automatically propagated to all CPE devices that are using the template.
To modify the basic NetFlow settings:
- Specify basic NetFlow settings in one of the following ways:
- If you want to edit basic NetFlow settings in a NetFlow template, go to the SD-WAN → NetFlow templates menu section and click the template.
- If you want to edit the basic NetFlow settings on a CPE device, go to the SD-WAN → CPE menu section, click the device, and in the displayed settings area, select the NetFlow tab and select the Override check box.
Basic NetFlow settings are displayed.
- In the NetFlow drop-down list, select Enabled. By default, the Disabled option is selected.
- Specify a NetFlow collector:
- Under Collectors, click + Add.
- Under Host, enter the IPv4 address of the NetFlow collector.
- Under Port, enter the port number of the NetFlow collector. Range of values: 1 to 65,535.
The NetFlow collector is specified and displayed in the Collectors section. You can specify multiple NetFlow collectors; to delete a collector, click the delete icon next to it. For an individual CPE device, you can specify a maximum of four NetFlow collectors.
- In the Export version drop-down list, select the version of the NetFlow protocol:
- 1
- 5
- 9 (default)
- In the Tracking level drop-down list, select which traffic packet information you want the CPE device to track:
- ETHER to track the following information:
- Source and destination IP addresses and ports
- Source and destination MAC addresses
- Outer VLAN tag
- Protocol being used
- FULL to track the source and destination IP addresses and ports, as well as the protocol being used. Default value.
- VLAN to track the following information:
- Source and destination IP addresses and ports
- Outer VLAN tag
- Protocol being used
- PROTO to track the source and destination IP addresses and the protocol being used.
- IP to track the source and destination IP addresses.
- ETHER to track the following information:
- In the Maximum flows field, enter the maximum number of traffic flows that the CPE device can simultaneously track. Range of values: 1 to 65,535. The default setting is
8192
.The higher the value, the higher the CPU load on the CPE device.
- In the Sampling rate field, specify how frequently you want the CPE device to track the traffic packet information. For example, if you enter
10
, the CPE device tracks information about every tenth packet of traffic. Range of values: 1 to 8192. The default setting is1024
.The lower the value, the more accurate the information and the higher the CPU load on the CPE device.
- In the Timeout maximum life (sec.) field, enter the maximum time in seconds for which the CPE device can track traffic flow information. To disable this feature, enter
0
. Range of values: 1 to 9999. The default setting is60
. - In the Hop limit field, enter the maximum number of hops to NetFlow collectors. Range of values: 1 to 255. The default setting is
64
. - If you want the CPE device to track IPv6 traffic, in the Track IPv6 drop-down list, select Enabled. By default, the Disabled option is selected.
- In the upper part of the settings area, click Save to save the settings of the NetFlow template or CPE device.
If you want a CPE device to send information about traffic packets to NetFlow collectors, you must enable the NetFlow protocol on network interfaces. The NetFlow protocol can be enabled on a network interface when creating or editing the network interface.