ModifyNatGatewaySpec - Virtual Private Cloud - Alibaba Cloud Documentation Center

Upgrades a subscription Internet NAT gateway.

Operation description

You cannot call this operation to downgrade a subscription Internet NAT gateway. You can downgrade a subscription Internet NAT gateway only in the console.
When you call this operation to upgrade a subscription Internet NAT gateway, an order is generated. After you complete the payment in the order center, the Internet NAT gateway is upgraded.
ModifyNatGatewaySpec is an asynchronous operation. After you make a request, the ID of the request is returned but the Internet NAT gateway is not upgraded. The system upgrades the NAT gateway in the background. You can call the DescribeNatGateways operation to query the status of an Internet NAT gateway. - If an Internet NAT gateway is in the Modifying state, the NAT gateway is being upgraded. In this case, you can only query the NAT gateway but cannot perform other operations.
- If an Internet NAT gateway is in the Available state, the Internet NAT gateway is upgraded.
You cannot repeatedly call the ModifyNatGatewaySpec operation to resize a pay-by-specification NAT gateway.

Internet NAT gateways are available in different sizes. The size of an Internet NAT gateway determines the SNAT performance, which includes the maximum number of connections and the number of new connections per second. However, the size of a NAT gateway does not affect the data throughput. The following table describes the correlations between different sizes of Internet NAT gateways and SNAT performance metrics.

Size	Maximum number of connections	Number of new connections per second
Small	10,000	1,000
Medium	50,000	5,000
Large	200,000	10,000

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Debug

Authorization information

There is currently no authorization information disclosed in the API.

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The ID of the region where the Internet NAT gateway is deployed. You can call the DescribeRegions operation to query the most recent region list.	cn-hangzhou
NatGatewayId	string	Yes	The ID of the Internet NAT gateway that you want to upgrade.	ngw-bp1uewa15k4iy5770****
Spec	string	Yes	The size of the Internet NAT gateway. Valid values: Small: small Middle: medium Large: large	Middle
AutoPay	boolean	No	Specifies whether to automatically complete the payment. true: enables automatic payment. Payments are automatically completed. false (default): disables automatic payment. If you select this option, you must go to the Order Center to complete the payment after an order is generated.	false
ClientToken	string	No	The client token that is used to ensure the idempotence of the request. You can use the client to generate the value, but you must make sure that it is unique among different requests. The token can contain only ASCII characters.	123e4567-e89b-12d3-a456-426655****

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The ID of the request.	DBD4E4A2-786E-4BD2-8EB6-107FFC2B5B7D

Examples

Sample success responses

JSONformat

{
  "RequestId": "DBD4E4A2-786E-4BD2-8EB6-107FFC2B5B7D"
}

Error codes

HTTP status code	Error code	Error message	Description
400	NATGW_MODIFY_SPEC_SAME	The specified Spec is same with now.	The specified gateway size is the same as the current one.
400	InvalidParameter.Spec.ValueNotSupported	The specified Spec is not valid.	The specification is invalid.
400	OperationFailed.SyncOrderToSub	SyncOrderToSub error.	The operation failed.
400	OperationFailed.QueryPrice	Query price failed when create order.	Failed to query the price when creating the order.
404	InvalidRegionId.NotFound	The specified RegionId does not exist in our records.	The specified region ID does not exist.
404	InvalidNatGatewayId.NotFound	The specified NatGatewayId does not exist in our records.	The value of the NatGatewayId parameter is invalid.
404	IncorrectStatus.NatGateway	%s	-
404	OperationUnsupported.PayByLcuNatModifySpec	The spec of payByLcu nat is unsupported to modify.	Pay-as-you-go NAT gateways cannot be resized.
404	Forbidden.ModifySpecToSpecialSpec	You are not authorized to modify nat spec to special spec.	-
404	Forbidden.ModifySpecToSpecialSpecForNormalNat	Normal NAT is not allowed to change to special spec, only enhanced nat allowed.	-
500	OperationFailed.NoAvailableResource	The Zone have no available resource.	No resources are available in the region.

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation
2023-03-01	The Error code has changed	View Change Details
2022-07-22	The Error code has changed	View Change Details