DB Subnet Groups

Create the network information that is used to create and control virtual database servers as a DB subnet group. In order to ensure the availability of databases, register two or more subnets that exist in different availability zones.

Note: You must create a subnet before you can register it in the DB subnet group.

Creating a DB Subnet Group

Create a DB subnet group by specifying the parameters as shown below.

Table 1. Creating a DB Subnet Group (List of Items That Can Be Set)
Item	Description	Required
DB subnet group ID	Specify a DB subnet group ID. The characters that you specify must meet the following specifications: Use alphanumeric characters and hyphens Use an alphabetic character as the first character You cannot use a hyphen as the last character You cannot use two or more consecutive hyphens Specify at least 1 character, and no more than 63 characters Note: If you omit the ID, random characters will be set.
DB subnet group name	Specify a name to identify the DB subnet group. The characters that you specify must meet the following specifications: Use alphanumeric characters and hyphens Use an alphabetic character as the first character You cannot use a hyphen as the last character You cannot use two or more consecutive hyphens Specify at least 1 character, and no more than 255 characters	Yes
Subnet list	Specify as a list the subnets to register in the DB subnet group Note: The specification of subnets must meet the following conditions: Two or more subnets are specified Each subnet that you specify belongs to a different availability zone	Yes
Description	Specify a description for the DB subnet group

Acquiring the DB Subnet Group List

Acquire a list of the DB subnet groups in the project.

Checking the DB Subnet Group Information

Check the information of the DB subnet group, such as which subnets are registered, by specifying the ID of the DB subnet group in the project.

Modifying a DB Subnet Group

Change the following settings by specifying the ID of the DB subnet group in the project.

Table 2. Modifying a DB Subnet Group (List of Items That Can Be Set)
Item	Description	Required
DB subnet group ID	Specify the DB subnet group ID. The characters that you specify must meet the following specifications: Use alphanumeric characters and hyphens Use an alphabetic character as the first character You cannot use a hyphen as the last character You cannot use two or more consecutive hyphens Specify at least 1 character, and no more than 63 characters Note: If you omit the ID, random characters will be set.
DB subnet group name	Specify a name to identify the DB subnet group. The characters that you specify must meet the following specifications: Use alphanumeric characters and hyphens Use an alphabetic character as the first character You cannot use a hyphen as the last character You cannot use two or more consecutive hyphens Specify at least 1 character, and no more than 255 characters
Subnet list	Specify as a list the subnets to register in the DB subnet group Note: The specification of subnets must meet the following conditions: Two or more subnets are specified Each subnet belongs to different availability zones
Description	Specify a description for the DB subnet group

Deleting a DB Subnet Group

Specify the ID of a DB subnet group in the project to delete a DB subnet group that is no longer necessary.

Note: Even if you delete the DB subnet group, the subnets that are registered in it will not be deleted.