Update Floating IP

PUT/v2.0/floatingips/{floatingip_id}

Assign a port in a private network to an existing floating IP.

To disassociate a floating IP from a port, set the port_id attribute to null or omit it from the request body.

info

Source: update-floating-ip

Request

Parameters

floatingip_idstringrequiredpath

The ID of the floating IP address.

floatingipobjectrequiredbody

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.

descriptionstringbody

A human-readable description for the resource. Default is an empty string.

fixed_ip_addressstringbody

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.

port_idstringrequiredbody

The ID of a port associated with the floating IP. To associate the floating IP with a fixed IP, you must specify the ID of the internal port. To disassociate the floating IP, null should be specified.

Sample Request

cURL

curl -ks -X PUT -H 'Content-Type: application/json' -H 'X-Auth-Token: gAAAAA<...>' -d '{
    "floatingip": {
        "port_id": "67f24e5f-5a80-4ffd-a841-6c413358be05"
    }
}' https://api.vietnix.cloud:9696/v2.0/floatingips/15adb7f5-05ce-4ec0-a146-b4921dcc5b4c

HTTP

PUT https://api.vietnix.cloud:9696/v2.0/floatingips/15adb7f5-05ce-4ec0-a146-b4921dcc5b4c
Content-Type: application/json
X-Auth-Token: gAAAAA<...>

{
    "floatingip": {
        "port_id": "67f24e5f-5a80-4ffd-a841-6c413358be05"
    }
}

Response

Response Parameters

floatingipobjectrequired

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.

idstringrequired

The ID of the floating IP address.

router_idstringrequired

The ID of the router for the floating IP.

statusstringrequired

The status of the floating IP. Values are ACTIVE, DOWN and ERROR.

descriptionstringrequired

A human-readable description for the resource.

dns_domainstringrequired

A valid DNS domain.

dns_namestringrequired

A valid DNS name.

port_detailsstringrequired

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_idstringrequired

The ID of the project.

created_atstringrequired

The date and time when the resource was created. The date and time stamp format is ISO 8601: CCYY-MM-DDThh:mm±hh. For example, 2015-08-27T09:49:58-05:00. The ±hh value, if included, is the time zone as an offset from UTC. In this example, the offset value is -05:00.

updated_atstringrequired

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±hh. For example, 2015-08-27T09:49:58-05:00. The ±hh value, if included, is the time zone as an offset from UTC. In this example, the offset value is -05:00.

revision_numberintegerrequired

The revision number of the resource.

project_idstringrequired

The ID of the project.

floating_network_idstringrequired

The ID of the network associated with the floating IP.

fixed_ip_addressstringrequired

The fixed IP address that is associated with the floating IP address.

floating_ip_addressstringrequired

The floating IP address.

port_idstringrequired

The ID of a port associated with the floating IP.

tagsarrayrequired

The list of tags on the resource.

port_forwardingsarrayrequired

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

Response body

{
    "floatingip": {
        "id": "15adb7f5-05ce-4ec0-a146-b4921dcc5b4c",
        "tenant_id": "f33507157a634f1cac71e06a70fb558e",
        "floating_ip_address": "45.115.16.163",
        "floating_network_id": "79cab11a-122d-43a7-9427-3575d9512413",
        "router_id": "6fea0caa-4922-4f17-a85e-d075c4f678f0",
        "port_id": "67f24e5f-5a80-4ffd-a841-6c413358be05",
        "fixed_ip_address": "192.168.1.1",
        "status": "DOWN",
        "description": "",
        "qos_policy_id": null,
        "port_details": {
            "name": "",
            "network_id": "42274a58-f901-42d5-bbfa-49535e550270",
            "mac_address": "fa:16:3e:9e:6c:37",
            "admin_state_up": true,
            "status": "ACTIVE",
            "device_id": "6fea0caa-4922-4f17-a85e-d075c4f678f0",
            "device_owner": "network:router_interface_distributed"
        },
        "tags": [],
        "created_at": "2025-09-25T01:33:46Z",
        "updated_at": "2025-09-25T02:15:19Z",
        "revision_number": 7,
        "project_id": "f33507157a634f1cac71e06a70fb558e"
    }
}

Status Codes

Success

Status Code	Description
200 - OK	Request was successful.

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.
412 - Precondition Failed	The server does not meet one of the preconditions that the requester put on the request header fields.

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.