Create and manage attachments

An attachment is a connection unit in a Transit Gateway that represents the source or destination of traffic. You can select subnets by availability zone within a VPC to support a multi-AZ high-availability configuration.
After creating a Transit Gateway attachment and associating it with a route table, you can centrally control the traffic for that route.

Permission notice

Creating, viewing, configuring, approving, and deleting attachments require Project administrator permissions.

Create attachment

The following describes how to create an attachment.

1. Go to KakaoCloud console > Networking > Transit Gateway.

2. Click the Attachment menu on the left, and then click the [Create attachment] button.

3. Enter the basic information for the attachment to create, and then click the [Create] button.

   Create attachment

   Category	Description
   Transit Gateway	Transit Gateway to connect
   VPC	VPC to attach to the Transit Gateway

Manage attachments

The following describes how to manage attachments.

View attachment list and basic information

You can view the list of created attachments and their basic information.

1. Go to KakaoCloud console > Networking > Transit Gateway.

2. In the Attachment menu on the left, view the currently created attachments.

   Category	Description
   ID	Unique ID of the attachment
   Status	Status of the attachment - Creating: Attachment is being created - Pending Approve: Waiting for approval - Updating: Attachment is being updated - Deleting: Attachment is being deleted - Active: Attachment provisioning succeeded - Error: Attachment error occurred
   Transit Gateway name	Name of the Transit Gateway
   Transit Gateway ID	Unique ID of the Transit Gateway
   Resource name	Name of the resource connected to the attachment
   Resource ID	Unique ID of the resource connected to the attachment
   Created at	Date when the attachment was created

View attachment details

You can view detailed information about the attachment.

1. Go to KakaoCloud console > Networking > Transit Gateway.

2. Select the target attachment from the Attachment menu on the left.

3. Check the information of the attachment on each tab.

   Details tab

   Item	Description
   ID	Unique identifier of the attachment
   Status	Current status information of the attachment
   Owner project ID	Unique identifier of the project that created the attachment
   Created at	Date and time when the attachment was created
   Transit Gateway name	Name of the connected Transit Gateway
   Transit Gateway ID	Unique identifier of the connected Transit Gateway
   Transit Gateway owner project ID	Unique identifier of the project that owns the Transit Gateway
   Route table name	Name of the route table connected to the attachment
   Route table ID	Unique identifier of the route table connected to the attachment
   Resource type	Type of the resource connected to the Transit Gateway
   Resource name	Name of the connected resource
   Resource CIDR block	IP address range (CIDR) of the connected resource
   Resource ID	Unique identifier of the connected resource

   Resource tab

   Category	Description
   VPC name	Name of the VPC connected through the attachment
   VPC ID	Unique ID of the VPC connected through the attachment
   Subnet name	Name of the subnet selected when creating the attachment
   Subnet ID	Unique ID of the subnet connected to the attachment
   Status	Current status of the subnet connected to the attachment
   IP CIDR block	IP address range (CIDR) assigned to the connected subnet
   Availability zone	Availability Zone (AZ) where the connected subnet is deployed

   info

   • The Transit Gateway owner cannot view resource information in the attachment details created by a participant.

Modify attachment subnet settings

The following describes how to modify the subnet settings of an attachment.

1. Go to KakaoCloud console > Networking > Transit Gateway.
2. In the Attachment menu on the left, select [⋮] > Modify for the target attachment.
3. Modify the subnet settings in the pop-up window, and then click the [Save] button.

Approve attachment

The following describes how to approve an attachment.

info

The [Approve] button is displayed only when the Transit Gateway share acceptance setting is Manual and an attachment created by another project is in the Pending Approve state.

1. Go to KakaoCloud console > Networking > Transit Gateway.
2. In the Attachment menu, select [⋮] > Approve for the target attachment.
3. Click the [Approve] button in the pop-up window.

Delete attachment

The following describes how to delete an attachment.

1. Go to KakaoCloud console > Networking > Transit Gateway.
2. In the Attachment menu, select [⋮] > Delete for the attachment to delete.
3. Enter the delete confirmation text in the pop-up window, and then click the [Delete] button.