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Version: FCP 25.11

Subnet Management

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When Hybrid Cloud is enabled for FCP-Suite, you can create Cloud Subnets.

Subnets are a required configuration for clusters. Generally, a subnet is a smaller network segment split from a larger CIDR block. The Subnets page is the single entry point for managing subnets on the platform, including creating, viewing, and deleting subnets.

Permissions​

For details, see Permissions.

Field Descriptions​

  • Subnet Name: The unique name of the subnet on the platform. When creating a subnet, the name must start with su-. Click the name to open the subnet details page. The name ends with random digits; you can change the random-digit part as needed. Naming rules: 3 to 62 characters, composed of letters, digits, and -, and must start with su-.
  • Subnet ID: Auto-generated subnet ID.
  • Subnet Type: Local Subnet or Cloud Subnet.
  • IPv4 CIDR Block: The address range of the subnet. The CIDR block must be a subnet of the VPC IPv4 CIDR block (as shown in the UI) and must not overlap with existing CIDR blocks. The IPv4 subnet mask must be between /28 and /16. The input is validated and the platform calculates the number of IPv4 addresses automatically.
  • Total IPv4: Total number of IPv4 addresses in the subnet.
  • Username: The creator of the subnet.
  • Status: Current subnet status.
    • In Use: The subnet is used by active nodes or clusters.
    • Not Used: The subnet is not used.
  • Actions: Currently, only Delete is supported. More actions may be added in later versions. Deletion rules:
    • For subnets In Use, the delete button is not shown.
    • For subnets Not Used, the delete button is shown.
  • Remarks: Optional remarks to help differentiate subnets.

Subnet Limits​

To ensure stable platform operation, subnet creation has the following rules.

Rules:

  • Maximum number of subnets: 10.
  • CIDR blocks must not overlap across subnets.
  • The CIDR block of an existing subnet cannot be changed.
  • Only administrators can create subnets.
  • Regular users can only use subnets.

Subnet Types​

Local Subnet

Logical on-prem subnet network. When adding on-prem subscription nodes, you must select a Local Subnet.

Cloud Subnet

Logical cloud subnet network. When adding pay-as-you-go or subscription nodes, you must select a Cloud Subnet.

Delete a Subnet​

  • To delete a subnet, click the Delete button on the far right of the subnet row. A result panel slides in from the right at the top-right corner of the page.
  • A subnet can be deleted only when its status is Not Used.

This section covers the subnet lifecycle management. Networking in the platform is relatively simple, but it is an essential part of the system and requires some basic networking knowledge. If you still have questions after reading this section, contact Fastone support for assistance.