Create Floating IP

POST /v2.0/floatingips

Creates a floating IP.

You can obtain the required floating_network_id and subnet_id from a request to GET /v2.0/networks?provider:physical_network=Public.

The status will change to ACTIVE after a while.

info

Source: create-floating-ip

Request

Parameters

Name	In	Type	Description
floatingip	body	object	A floatingip object. When you associate a floating IP address with a VM, the instance has the same public IP address each time that it boots, basically to maintain a consistent IP address for maintaining DNS assignment.
description (Optional)	body	string	A human-readable description for the resource. Default is an empty string.
dns_domain (Optional)	body	string	A valid DNS domain.
dns_name (Optional)	body	string	A valid DNS name.
tenant_id	body	string	The ID of the project.
project_id	body	string	The ID of the project.
floating_network_id	body	string	The ID of the network associated with the floating IP.
fixed_ip_address (Optional)	body	string	The fixed IP address that is associated with the floating IP. If an internal port has multiple associated IP addresses, the service chooses the first IP address unless you explicitly define a fixed IP address in the `fixed_ip_address` parameter.
floating_ip_address (Optional)	body	string	The floating IP address.
port_id (Optional)	body	string	The ID of a port associated with the floating IP. To associate the floating IP with a fixed IP at creation time, you must specify the identifier of the internal port.
subnet_id (Optional)	body	string	The subnet ID on which you want to create the floating IP.

Sample Request

Using `curl`

curl -ks -H 'Content-Type: application/json' -H 'X-Auth-Token: gAAAAA<...>' -d '{
    "floatingip": {
        "floating_network_id": "79cab11a-122d-43a7-9427-3575d9512413"
    }
}' https://api.vietnix.cloud:9696/v2.0/floatingips

Using HTTP request

POST https://api.vietnix.cloud:9696/v2.0/floatingips
Content-Type: application/json
X-Auth-Token: gAAAAA<...>

{
    "floatingip": {
        "floating_network_id": "79cab11a-122d-43a7-9427-3575d9512413"
    }
}

Response

Response Parameters

Name	In	Type	Description
floatingip	body	object	A floatingip object. When you associate a floating IP address with a VM, the instance has the same public IP address each time that it boots, basically to maintain a consistent IP address for maintaining DNS assignment.
id	body	string	The ID of the floating IP address.
router_id	body	string	The ID of the router for the floating IP.
status	body	string	The status of the floating IP. Values are ACTIVE, DOWN and ERROR.
description	body	string	A human-readable description for the resource.
dns_domain	body	string	A valid DNS domain.
dns_name	body	string	A valid DNS name.
port_details	body	string	The information of the port that this floating IP associates with. In particular, if the floating IP is associated with a port, this field contains some attributes of the associated port, including name, network_id, mac_address, admin_state_up, status, device_id and device_owner. If the floating IP is not associated with a port, this field is null.
tenant_id	body	string	The ID of the project.
created_at	body	string	The date and time when the resource was created. The date and time stamp format is ISO 8601: CCYY-MM-DDThh:mm:ss±hh:mm. For example, 2015-08-27T09:49:58-05:00. The ±hh:mm value, if included, is the time zone as an offset from UTC. In this example, the offset value is -05:00.
updated_at	body	string	The date and time when the resource was updated. If the resource has not been updated, this field will be null. The date and time stamp format is ISO 8601: CCYY-MM-DDThh:mm:ss±hh:mm. For example, 2015-08-27T09:49:58-05:00. The ±hh:mm value, if included, is the time zone as an offset from UTC. In this example, the offset value is -05:00.
revision_number	body	integer	The revision number of the resource.
project_id	body	string	The ID of the project.
floating_network_id	body	string	The ID of the network associated with the floating IP.
fixed_ip_address	body	string	The fixed IP address that is associated with the floating IP address.
floating_ip_address	body	string	The floating IP address.
port_id	body	string	The ID of a port associated with the floating IP.
tags	body	array	The list of tags on the resource.
port_forwardings	body	array	The associated port forwarding resources for the floating IP. If the floating IP has multiple port forwarding resources, this field has multiple entries. Each entry consists of network IP protocol (protocol), the fixed IP address of internal neutron port (internal_ip_address), the TCP or UDP port used by internal neutron port (internal_port) and the TCP or UDP port used by floating IP (external_port).

Sample Response

{
    "floatingip": {
        "id": "4f2038c2-bd8d-4c78-b65d-7d19eb96e3b1",
        "tenant_id": "f33507157a634f1cac71e06a70fb558e",
        "floating_ip_address": "45.115.16.162",
        "floating_network_id": "79cab11a-122d-43a7-9427-3575d9512413",
        "router_id": null,
        "port_id": null,
        "fixed_ip_address": null,
        "status": "DOWN",
        "project_id": "f33507157a634f1cac71e06a70fb558e",
        "description": "",
        "qos_policy_id": null,
        "port_details": null,
        "tags": [],
        "created_at": "2025-09-25T02:02:29Z",
        "updated_at": "2025-09-25T02:02:29Z",
        "revision_number": 0
    }
}

Status Codes

Success

Status Code	Description
201 - Created	Resource was created and is ready to use.

Error

Status Code	Description
400 - Bad Request	Some content in the request was invalid.
401 - Unauthorized	User must authenticate before making a request.
404 - Not Found	The requested resource could not be found.
409 - Conflict	This operation conflicted with another operation on this resource.

Error Details

400 - Bad Request may occur if:
- The network is not external (router:external is false).
- The internal networking port is not associated with the floating IP address.
- The requested floating IP address does not fall in the subnet range for the external network.
- The fixed IP address is not valid.
404 - Not Found occurs if the port_id is not valid.
409 - Conflict may occur if:
- The requested floating IP address is already in use.
- The internal networking port and fixed IP address are already associated with another floating IP.

Request​

Parameters​

Sample Request​

Using curl​

Using HTTP request​

Response​

Response Parameters​

Sample Response​

Status Codes​

Success​

Error​

Error Details​