Configure NetFlow Probe

NetFlow probe is used to probe network traffic on the Connect EZ device and export statistics to NetFlow collectors.

Required configuration items

Additional configuration items

To probe network traffic and export statistics to NetFlow collectors:


  1. Log into Digi Remote Manager, or log into the local Web UI as a user with full Admin access rights.
  2. Access the device configuration:

    1. Locate your device as described in Use Digi Remote Manager to view and manage your device.
    2. Click the Device ID.
    3. Click Settings.
    4. Click to expand Config.

    1. On the menu, click System. Under Configuration, click Device Configuration.

      The Configuration window is displayed.

  3. Click Monitoring > NetFlow probe.

  4. Enable NetFlow probe.
  5. Protocol version: Select the Protocol version. Available options are:
    • NetFlow v5—Supports IPv4 only.
    • NetFlow v9—Supports IPv4 and IPv6.
    • NetFlow v10 (IPFIX)—Supports both IPv4 and IPv6 and includes IP Flow Information Export (IPFIX).

    The default is NetFlow v10 (IPFIX).

  6. Enable Flow sampler by selecting a sampling technique. Flow sampling can reduce flow processing and transmission overhead by providing a representative subset of all flows. Available options are:
    • None—No flow sampling method is used. Each flow is accounted.
    • Deterministic—Selects every nth flow, where n is the value of Flow sampler population.

    • Random—Randomly selects one out of every n flows, where n is the value of Flow sampler population.

    • Hash—Randomly selects one out of every n flows using the hash of the flow key, where n is the value of Flow sampler population.

  7. For Flow sampler population, if you selected a flow sampler, enter the number of flows for the sampler. Allowed value is any number between 2 and 16383. The default is 100.
  8. For Inactive timeout, type the the number of seconds that a flow can be inactive before sent to a collector. Allowed value is any number between 1 and 15. The default is 15.
  9. For Active timeout, type the number of seconds that a flow can be active before sent to a collector. Allowed value is any number between 1 and 1800. The default is 1800.
  10. For Maximum flows, type the maximum number of flows to probe simultaneously. Allowed value is any number between 0 and 2000000. The default is 2000000.
  11. Add collectors:
    1. Click to expand Collectors.
    2. For Add Collector, click .
    3. (Optional) Type a Label for the collector.
    4. For Address, type the IP address of the collector.
    5. (Optional) For Port, enter the port number used by the collector. The default is 2055.

    Repeat to add additional collectors.

  12. Click Apply to save the configuration and apply the change.
  1. Select the device in Remote Manager and click Actions > Open Console, or log into the Connect EZ local command line as a user with full Admin access rights.

    Depending on your device configuration, you may be presented with an Access selection menu. Type admin to access the Admin CLI.

  2. At the command line, type config to enter configuration mode:

    > config
(config)>

  3. Enable NetFlow:
    (config)> monitoring netflow enable true
(config)>
  4. Set the protocol version:
    (config)> monitoring netflow protocol version
						(config)>

    where version is one of:

    • v5—NetFlow v5 supports IPv4 only.
    • v9—NetFlow v9 supports IPv4 and IPv6.
    • v10—NetFlow v10 (IPFIX) supports both IPv4 and IPv6 and includes IP Flow Information Export (IPFIX).

    The default is v10.

  5. Enable flow sampling by selecting a sampling technique. Flow sampling can reduce flow processing and transmission overhead by providing a representative subset of all flows. 
    (config)> monitoring netflow sampler type
(config)>

    where type is one of:

    • none—No flow sampling method is used. Each flow is accounted.
    • deterministic—Selects every nth flow, where n is the value of the flow sample population.
    • random—Randomly selects one out of every n flows, where n is the value of the flow sample population.
    • hash—Randomly selects one out of every n flows using the hash of the flow key, where n is the value of the flow sample population.

  6. If you are using a flow sampler, set the number of flows for the sampler:
    (config)> monitoring netflow sampler_population value
(config)>

    where value is any number between 2 and 16383. The default is 100.

  7. Set the number of seconds that a flow can be inactive before sent to a collector:
    (config)> monitoring netflow inactive_timeout value
(config)>

    where value is any is any number between 1 and 15. The default is 15.

  8. Set the number of seconds that a flow can be active before sent to a collector:
    (config)> monitoring netflow active_timeout value
(config)>

    where value is any is any number between 1 and 1800. The default is 1800.

  9. Set the maximum number of flows to probe simultaneously:
    (config)> monitoring netflow max_flows value
(config)>

    where value is any is any number between 0 and 2000000. The default is 2000000.

  10. Add collectors:
    1. Add a collector:
      (config)> add monitoring netflow collector end
(config monitoring netflow collector 0)>
    2. Set the IP address of the collector:
      (config monitoring netflow collector 0)> address ip_address
(config monitoring netflow collector 0)>
    3. (Optional) Set the port used by the collector:
      (config monitoring netflow collector 0)> port port
(config monitoring netflow collector 0)>
    4. (Optional) Set a label for the collector:
      (config monitoring netflow collector 0)> label "This is a collector."
(config monitoring netflow collector 0)>

    Repeat to add additional collectors.

  11. Save the configuration and apply the change.
    (config monitoring netflow collector 0)> save
Configuration saved.
>
  12. Type exit to exit the Admin CLI.

    Depending on your device configuration, you may be presented with an Access selection menu. Type quit to disconnect from the device.