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Flowmon on LoadMaster: Bonded Interfaces for Network Telemetry

The LoadMaster Network Telemetry feature provides a built-in Flowmon Probe that assembles flow data from selected network interfaces.

This document describes how to set up bonded interfaces on LoadMaster so that flow data can be collected by the Probe, including:

  • How to set up bonded interfaces on LoadMaster.
  • How to configure bonded interfaces for monitoring by the Flowmon Probe on LoadMaster.
  • How to configure a Flowmon Collector to receive Probe data from LoadMaster.

LoadMaster Interface Bonding Settings

The LoadMaster has the ability to bond its interfaces together to provide for additional throughput as well as redundancy. The LoadMaster supports two styles of bonding: 802.3ad and Active-Backup.

Before creating a bonded interface, please note the following:

  • You can only bond interface ports numbered greater than the initial port chose for the bond. For example, if you choose to start with port 10, then you can only add ports 11 and greater.
  • If you need VLAN tagging, create the bond first; add VLANs after the bond has been configured.
  • In order to add a port to a bonded interface, any IP addressing must first be removed from the port to be added.
  • Enabling the Active-Backup mode generally does not require switch intervention.
  • Bonding eth0 with eth1 can lead to serious issues and is not permitted.

To configure an interface for use with bonding, follow the steps below in the LoadMaster Web User Interface (WUI):

  1. In the main menu, select System Configuration.
  2. Click Network Setup.
  3. Select the lowest indexed interface that you want to add to the bonded interface; for example, eth1.
  4. Click the Interface Bonding button.
  5. Click Create a bonded interface. [Note: The port used (e.g., eth1), will now be listed in the left frame navigation pane as bnd followed by the interface number (e.g., bnd1).]

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  1. To add interfaces or to modify the bond type click Bonded Devices. [Note: Currently, the bonded interface must have an IP address assigned to be selected. This issue will be adressed in a future release.]

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  1. You can select the style of bonding in the Bonding mode drop-down list:
  2. To add another interface to the bond, select the interface in the Add Link drop-down list and click Add Link.

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LoadMaster Network Telemetry Settings

To configure a Network Telemetry, follow the steps below in the LoadMaster Web User Interface (WUI):

  1. In the main menu, select Network Telemetry.
  2. Set Collector Endpoint to the IP address of the Flowmon Collector. [Note: You can download and install a trial Collector by clicking Download Flowmon Collector.] 

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  1. Open the Activate Export of Application Flow Data Per Interface tab and select the interfaces that you want to monitor.

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Flowmon Collector Settings

Once you complete the steps in the previous sections, the probe will begin sending data to the configured Collector device and a new Source will be created for the LoadMaster on the Collector.

Once the LoadMaster source exists, you can set up Simple Network Management Protocol (SNMP) monitoring of LoadMaster by the collector. This is optional but is highly recommended, as this allows the Collector to obtain network interface information directly from LoadMaster, and display flow information by interface, including bonded interfaces. The process below assumes that you have already configured SNMP on LoadMaster and it is running.

  1. To setup the Collector to communicate with LoadMaster via SNMP, navigate to the Flowmon Monitoring Center and open the Sources page. Click on the Edit button for the LoadMaster source. In the dialog below, enter the LoadMaster SNMP connection parameters. [Note: Ensure that SNMP is configured and running on LoadMaster.] 

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  1. Once the SNMP connection is established, the Flowmon Collector will retrieve the list of interfaces from LoadMaster. You can see them when you switch to the table view on the Sources page and display detail of the LM source.

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  1. You can select a bonded interface on the LM server and see the data flowing over that interface in the Analysis page.

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