How can I split data on an interface for specific subnets?

Document ID : KB000103706
Last Modified Date : 28/06/2018
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Question:
I want to monitor data from specific subnets separately on one interface, how can I split data on an interface for specific subnets in NFA?
Answer:
Follow the steps in How to Configure a Custom Virtual Interface in the NFA Documentation.
 

Create a Custom Virtual Interface

Follow these steps:

  1. Open the Active Interfaces page:
    1. Select Administration from the NFA console menu.
      The Administration page opens.
    2. Select Interfaces, Physical & Virtual from the menu on the left side of the page.
      The Active Interfaces page opens.
  2. Expand the interface list for the parent router by clicking the arrow next to the router name.
  3. Select the check box next to the name of a single interface.
  4. Click Add Custom Virtual Interface.
    The Add Custom Virtual Interface dialog opens.
  5. Enter values for the following fields:
    • Interface Name: Replace the default value in the Interface Name field with a meaningful name for the interface list.
      Default: Parent interface name, which you must replace.
    • Description: (Optional) Enter a text string to help identify the interface.
    • In Speed and Out Speed: (Optional) Identify the speed of data that is inbound to the parent interface and outbound from the parent interface.
    • Type: (Optional) Select the interface type from the list.
    • Domain: Select a tenant-domain combination from the list or accept the default setting.
      Changing the domain can affect which operators and reports have access to the data. The Domain option is visible only in an environment that contains multiple domains.
    • Subnet: Enter a subnet and mask identification for each subnet filter you want to use for this CVI, then click Add. Use the format:
      <subnet IP address/subnet mask>
      The CVI must contain at least one subnet filter.
  6. Click Save.
    The Custom Virtual Interface is automatically deployed within one minute. The Class icon for the new CVI distinguishes it from the physical interfaces.