Last updated: 2020-04-09 18:54:03

    1. API Description

    Domain name for API request:

    This API is used to create one or more ENIs.

    • You can specify private IP addresses and a primary IP when creating an ENI. The specified private IP must be in the same subnet as the ENI and is not occupied.
    • When creating an ENI, you can specify the number of private IP addresses that you want to apply for. The system will randomly generate private IP addresses.
    • An ENI can only be bound with a limited number of IP addresses. For more information about resource limits, see ENI Use Limits.
    • You can bind an existing security group when creating an ENI.
    • You can bind a tag when creating an ENI. The tag list in the response indicates the tags that have been successfully added.

    A maximum of 100 requests can be initiated per second for this API.

    Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

    2. Input Parameters

    The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

    Parameter Name Required Type Description
    Action Yes String Common parameter. The value used for this API: CreateNetworkInterface.
    Version Yes String Common parameter. The value used for this API: 2017-03-12.
    Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
    VpcId Yes String The ID of the VPC instance. You can obtain the parameter value from the VpcId field in the returned result of DescribeVpcs API.
    NetworkInterfaceName Yes String The name of the ENI. The maximum length is 60 characters.
    SubnetId Yes String The subnet instance ID of the ENI, such as subnet-0ap8nwca.
    NetworkInterfaceDescription No String ENI description can be named freely, but the maximum length is 60 characters.
    SecondaryPrivateIpAddressCount No Integer The number of private IP addresses that is newly applied for. The total number of private IP addresses cannot exceed the quota.
    SecurityGroupIds.N No Array of String Specifies the security group to be bound with, such as ['sg-1dd51d'].
    PrivateIpAddresses.N No Array of PrivateIpAddressSpecification The information of the specified private IPs. You can specify a maximum of 10 each time.
    Tags.N No Array of Tag Bound tags, such as [{"Key": "city", "Value": "shanghai"}].

    3. Output Parameters

    Parameter Name Type Description
    NetworkInterface NetworkInterface ENI instance.
    RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

    4. Example

    Example1 Creating an ENI

    Input Example
    &<Common request parameters>

    Output Example

        "Response": {
            "NetworkInterface": {
                "NetworkInterfaceId": "eni-irk5qhhl",
                "VpcId": "vpc-0akbol5v",
                "SubnetId": "subnet-76r802pg",
                "NetworkInterfaceName": "TestNIC",
                "NetworkInterfaceDescription": "TestDesc",
                "MacAddress": "20:90:6F:62:33:E2",
                "PrivateIpAddressSet": [
                        "PrivateIpAddress": "",
                        "Primary": true,
                        "AddressId": "",
                        "PublicIpAddress": "",
                        "Description": "",
                        "IsWanIpBlocked": false,
                        "State": "PENDING"
                "Attachment": null,
                "GroupSet": [],
                "Primary": false,
                "State": "PENDING",
                "Zone": "",
                "CreatedTime": "",
                "Ipv6AddressSet": [],
                "TagSet": [
                        "Key": "city",
                        "Value": "shanghai"
            "RequestId": "5cf1a813-d4f8-4e0c-8f90-c155a84a3ea1"

    5. Developer Resources

    API Explorer

    This tool allows online call, signature authentication, SDK code generation and quick search of APIs to greatly improve the efficiency of using TencentCloud APIs.


    TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

    Command Line Interface

    6. Error Code

    The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

    Error Code Description
    InvalidParameterValue Invalid parameter value
    InvalidParameterValue.LimitExceeded The parameter value exceeds the limit.
    InvalidParameterValue.Malformed Invalid input parameter format.
    InvalidParameterValue.Range The parameter value is not in the specified range.
    InvalidParameterValue.Reserved The parameter value is retained by the system.
    LimitExceeded Quota limit is reached.
    MissingParameter Parameter missing. A required parameter is missing in the request.
    ResourceNotFound The resource does not exist.

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