Create and manage attachment

An attachment represents the source/destination of packets in the transit gateway and can be used to set up multi-AZ high availability by selecting subnets from different availability zones within a VPC.
By creating a transit gateway attachment and associating it with the routing table, traffic can be centrally controlled. Below are the steps for creating and managing attachments.

Permission guide

To create, view, configure, approve, or delete attachments, project administrator permissions are required.

Create attachment

To create a new attachment, follow these steps:

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.

2. In the Attachment menu, check the list of currently created attachments and click the [Create attachment] button.

3. Enter the basic information for the attachment and click the [Apply] button.

   

   Field	Description
   Transit gateway	The transit gateway to which the resource will be attached - Owner: The transit gateway created by you - Shared: A shared gateway
   Resource	The resource to attach to the transit gateway - Only VPC is selectable

Manage attachment

To manage attachments, such as viewing the list or modifying details, follow these steps.

View attachment list

You can view the list of created attachments. Go to KakaoCloud Console > Transit Gateway > Attachment to check the list of attachments.

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.

2. In the Attachment menu, check the list of currently created attachments.

   Viewing attachment list

   Field	Description
   Attachment id	Unique ID of the attachment
   Status	The status of the attachment - Creating: Attachment is being created - Pending approve: Awaiting approval - Updating: Attachment is being updated - Deleting: Attachment is being deleted - Active: Attachment provisioning successful - 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 attached to the attachment
   Resource id	Unique ID of the resource attached to the attachment
   Creation date	Date the attachment was created
   Attachment owner project id	The project ID of the attachment owner, and whether it is shared - Owner: Created by the owner - Shared: Visible when the attachment is connected to a shared transit gateway from another project
   More actions	Provides additional features - Modify - Approve - Delete

View basic information of attachment

You can check the basic information of an attachment, such as its status and creation date.

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.

2. In the Attachment menu, select the attachment to view its details.

3. View the basic information of the attachment.

   Attachment detail

   Field	Description
   Status	The status of the attachment - Creating: Attachment is being created - Pending approve: Awaiting approval - Updating: Attachment is being updated - Deleting: Attachment is being deleted - Active: Attachment provisioning successful - Error: Attachment error occurred
   Creation date	Date the attachment was created
   Attachment owner project id	The project ID of the attachment owner, and whether it is shared - Owner: Created by the owner - Shared: Visible when the attachment is connected to a shared transit gateway from another project

View detailed information of attachment (by tab)

You can view detailed information of the attachment in each tab.

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.

2. In the Attachment menu, select the attachment to view its details.

3. View detailed information in each tab.

   Details tab

   Details tab

   Field	Description
   Attachment id	Unique ID of the attachment
   Transit gateway name	Name of the transit gateway
   Transit gateway id	Unique ID of the transit gateway
   Transit gateway owner project id	Project ID of the transit gateway's owner
   Routing table name	Name of the routing table
   Routing table id	Unique ID of the routing table
   Resource type	Type of the resource in the attachment
   Resource name	Name of the resource in the attachment
   Resource id	Unique ID of the resource in the attachment
   IP CIDR block	IP CIDR block of the resource in the attachment

   Resource tab

   Resource tab

   Field	Description
   VPC name	Name of the VPC
   VPC id	Unique ID of the VPC
   Subnet name	Name of the subnet
   Subnet id	Unique ID of the subnet
   Status	Status of the subnet
   IP CIDR block	IP CIDR block of the subnet
   Availability zone	Availability zone of the subnet

   info

   • The transit gateway owner cannot view the resource information of other participants' attachments.

Modify attachment

To modify an attachment, follow these steps:

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.
2. In the Attachment menu, click the [More actions] icon of the attachment you want to modify > Modify attachment.
3. In the popup, set the subnet for each AZ and click the [Apply] button.

Approve attachment

To approve an attachment, follow these steps:

info

The [Approve] button is only displayed when the transit gateway's sharing acceptance setting is set to Manual, and the attachment from another project is in the Pending approve state.

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.
2. In the Attachment menu, click the [More actions] icon of the attachment you want to approve > Approve.
3. In the Approve attachment popup, click the [Approve] button.

Delete attachment

To delete an attachment, follow these steps:

1. Go to KakaoCloud Console > Beyond Networking Service > Transit Gateway menu.
2. In the Attachment menu, click the [More actions] icon of the attachment you want to delete > Delete attachment.
3. In the popup, type Permanently delete and click the [Delete] button.