Configuring a NetFlow Collector in a Physical Device

To send the NetFlow information to the vRealize Network Insight NetFlow collector, configure the physical device manually. Here are the steps for the configuration in most of the physical devices:

1. Create a flow record.
   The required fields for a flow record are as follows:

   • Mark the following fields as Match.

     • ipv4 protocol

     • ipv4 source address

     • ipv4 destination address

     • transport source-port

     • transport destination-port

     • interface input

   • Mark the following fields as Collect.

     • direction

     • counter bytes

     • counter packets

     • timestamp sys-uptime first

     • timestamp sys-uptime last

   • Mark the following field as Match or Collect. If not, skip it.
     • transport tcp flags
2. Create a flow exporter.
   • Provide vRealize Network Insight NetFlow collector IP and port 2055.
3. Configure the flow cache as follows:
   • Active timeout: 30 seconds
   • Inactive timeout: 60 seconds
4. Create the flow monitor using the created flow record and flow exporter.
5. Configure the monitor on each interface.

Prerequisites

Example

The sample steps to configure the physical devices are provided in the following sections:

• Cisco 4500
• Cisco Nexus 1000v
• Cisco Nexus 9000

Note: The steps may vary from version to version and device to device.