Create a VSwitch in the specified VPC.

When calling this interface to create a switch, note:

  • Up to 24 VSwitches can be created in a VPC.

  • The first and last three IP addresses of the VSwitch are reserved by the system. For example, if the CIDR block of a VSwitch is 192.168.1.0/24, IP addresses 192.168.1.0, 192.168.1.253, 192.168.1.254, and 192.168.1.255 are reserved.

  • The number of cloud product instances under the VSwitch cannot exceed the remaining capacity of the VPC (subtract the current number of cloud product instances from 15,000).

  • A cloud product instance can only belong to one VSwitch.

  • VSwitches do not support broadcasting or multicasting. After a VSwitch is created, its CIDR block cannot be modified.

Request parameters

Name Type Required or not Description
Action String Yes

The action to perform. Value:

CreateVSwitch
ZoneId String Yes

The ID of the zone to which the switch belongs.

You can obtain the region ID by calling the DescribeZones API.

CidrBlock String Yes

The CIDR block of VSwitch. The IP address range must meet the following requirements:

  • The size of the subnet mask for the VSwitch can be /16 to /29.
  • The CIDR block of the VSwitch must belong to the CIDR block of the VPC.
  • The CIDR block of the VSwitch cannot be the same as any destination CIDR block in route entries of the VPC, but can be the subset of the destination CIDR block.
  • If the network segment of the switch is the same as the network segment of the same VPC, there can be only one switch for the VPC.
VpcId String Yes

The ID of the VPC to which the VSwitch belongs.
VSwitchName String No

The name of the VSwitch.

The name must be 1-128 characters in length and must start with English letters. However, the description cannot start with http:// or https://.

Description String No

The description of the VSwitch.

The description must be 2-256 characters in length and must start with English letters. However, the description cannot start with http:// or https://.

ClientToken String No

A client token used to guarantee the idempotence of requests.

This parameter value is generated by the client and must be unique. It cannot exceed 64 ASCII characters.

Response parameters

Name Type Description
RequestId String The ID of the request.
VSwitchId String The ID of the switch.

Examples

Request example

https://vpc.aliyuncs.com/?Action=CreateVSwitch
&CidrBlock=172.16.1.0/24
&VpcId=vpc-257gq642n
&ZoneId=cn-beijing-a
&CommonParameters
Response example

  • XML format

    <? xml version="1.0" encoding="UTF-8"? >
<CreateVSwitchResponse>
    <RequestId>0ED8D006-F706-4D23-88ED-E11ED28DCAC0</RequestId>
    <VSwitchId>vsw-25naue4gz</VSwitchId>
</CreateVSwitchResponse>

  • JSON format

    { 
    "RequestId": "0ED8D006-F706-4D23-88ED-E11ED28DCAC0", 
    "VSwitchId": "vsw-25naue4gz"
}