Create Logical Interface function

  • Release version: Zurich
  • Updated July 31, 2025
  • 2 minutes to read
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    Summary of Create Logical Interface function

    The Create Logical Interface function in the Telecommunications Network Inventory application allows ServiceNow customers to create logical interfaces that serve as termination points for logical connections or as children of physical or logical interfaces. Logical interfaces can have configurable bandwidth and are marked as virtual network interfaces. This function is designed for use as an action within Workflow Studio, enabling automated and inventory-related data operations.

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    Key Features

    • Parent-child relationships: Supports multiple child logical interfaces per physical or logical parent interface, ensuring unique parent-child associations.
    • Configurable bandwidth: Allows flexible configuration of the logical interface bandwidth based on requirements.
    • Virtual flag setting: Automatically sets the logical network interface as virtual.
    • Workflow integration: Available as a Workflow Studio action for seamless automation within Telecommunications Network Inventory workflows.
    • Input flexibility: Includes input fields such as parent interface, interface name, type, role, function, associated equipment, bandwidth, network interface model, CI relationship type, and aggregation option.
    • Automatic naming: Generates a logical interface name if none is provided by appending a number to the model name based on unit positions.
    • Role-based access: Restricted to users with the admin role for adding and configuring this action in flows.

    Input Fields

    The function accepts several inputs to define the logical interface characteristics and relationships:

    • Parent Interface: The parent network interface to associate with the logical interface.
    • Name: Logical interface name, auto-generated if left blank.
    • Type, Role, Function: User-defined codes to categorize the interface.
    • Telco Equipment: Equipment linked to the logical interface; defaults to parent interface’s equipment if unspecified.
    • Port Bandwidth: Specifies the bandwidth of the logical connection.
    • Product Model: Network interface model linked to the logical interface.
    • CI Relationship: Defines the relationship type, defaulting to "Contains : Contained By".
    • Aggregation Interface: Boolean option to enforce a single child interface per parent.

    Output

    The function returns a GlideRecord representing the newly created logical interface, allowing further automation or integration steps to reference this record directly.

    Practical Benefits for ServiceNow Customers

    • Enables precise modeling of network interface hierarchies within telecommunications inventory.
    • Supports automated workflows managing network inventory data, improving accuracy and efficiency.
    • Flexible input parameters allow tailored interface creation to reflect real-world network configurations.
    • Access control ensures only authorized administrators can configure and execute this function within workflows.

    The Create Logical Interface function enables you to create logical interfaces in the Telecommunications Network Inventory application.

    You can use the Create Logical Interface function to create the logical interfaces that are created either as a termination point for logical connections or as a child of a physical or logical interface. A physical or logical Interface can have multiple child logical interfaces. The bandwidth of the logical Interface isn’t fixed and you can configure it as applicable. Also, this function sets the virtual flag of the logical network interface.

    You can use this function as a Workflow Studio action in the Telecommunications Network Inventory workflow.

    Roles and availability

    Users with the admin role can add an action to a flow and define the configuration details of the flow. This function is available as a Workflow Studio action in the Telecommunications Network Inventory application so that you can perform inventory-related data operations.

    Input fields

    The following table lists the input fields in the Create Logical Interface function and their descriptions.

    Table 1. Input fields of logical interface action
    Field Name Description Data Type
    Parent Interface Parent network interface record to create the relationship with a logical interface. Click the add icon (Add icon) to add an interface. Array.String
    Name Name of the new logical interface.
    Note:
    If you don’t enter the logical interface name, this flow action generates the model name with the number after the maximum number of unit positions.
    		 String
    Type Optional user-defined type code that you use to categorize the types of various network entities or assets. Reference.TRF Value
    Role Optional user-defined role code that you use to categorize the roles or purposes of the various network entities or assets. Reference.TRF Value
    Function Optional user-defined function code that you use to categorize the functions of the various network entities or assets. Reference.TRF Value
    Telco Equipment Equipment that is associated with the logical interface. If you do not enter the name of the equipment, this function selects the associated equipment from the parent interface. Reference.Telco equipment
    Port Bandwidth Bandwidth of this logical connection. Reference.Bandwidth
    Product Model Network interface model that is associated with the logical interface. Reference.Network Interface Model
    CI Relationship Type of CI relationship. By default, the Create Logical Interface flow action sets the CI relationship to Contains : Contained By. The parent interface can support multiple interface record references as an input. If you enter the same parent CI more than once, the system ensures that it associates to a unique set of parent-child relationship. Reference.CI Relationship
    Aggregation Interface Option to ensure that each parent interface must only have one child interface. True/False

    To learn more about the variable data types, see Flow Designer input and output data variables.

    Output

    The following table lists the information about the function output.

    Table 2. Output of function
    Name Description Data Type
    Result Id Returns a glide record of the logical interface. Record