Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

Preferences
Contact Us
Feedback
AWS Documentation
Create an AWS Account

Associate or disassociate AWS Direct Connect with a transit gateway

PDF
RSS
Focus mode
Associate or disassociate AWS Direct Connect with a transit gateway - AWS Direct Connect

Associate or disassociate a transit gateway using either the AWS Direct Connect console or using the command line or API.

To associate a transit gateway

  1. Open the AWS Direct Connect console at https://console.aws.amazon.com/directconnect/v2/home.

  2. In the navigation pane, choose Direct Connect Gateways and then select the Direct Connect gateway.

  3. Choose View details.

  4. Choose Gateway associations and then choose Associate gateway.

  5. For Gateways, choose the transit gateway to associate.

  6. In Allowed prefixes, enter the prefixes (separated by a comma, or on a new line) which the Direct Connect gateway advertises to the on-premises data center. For more information on allowed prefixes, see Allowed prefixes interactions.

  7. Choose Associate gateway

You can view all of the gateways that are associated with the Direct Connect gateway by choosing Gateway associations.

To disassociate a transit gateway

  1. Open the AWS Direct Connect console at https://console.aws.amazon.com/directconnect/v2/home.

  2. In the navigation pane, choose Direct Connect gateways and then select the Direct Connect gateway.

  3. Choose View details.

  4. Choose Gateway associations and then select the transit gateway.

  5. Choose Disassociate.

To update allowed prefixes for a transit gateway

You can add or remove allowed prefixes to the transit gateway.

  1. Open the AWS Direct Connect console at https://console.aws.amazon.com/directconnect/v2/home.

  2. In the navigation pane, choose Direct Connect gateways and then choose the Direct Connect gateway you want to add or remove allowed prefixes for.

  3. Choose the Gateway associations tab.

  4. Choose the gateway you want to modify allowed prefixes for, and then choose Edit.

  5. In Allowed prefixes, enter the prefixes which the Direct Connect gateway advertises to the on-premises data center. For multiple prefixes, separate each prefix by a comma or put each prefix on a new line. The prefixes you add should match the Amazon VPC CIDRs for all virtual private gateways. For more information on allowed prefixes, see Allowed prefixes interactions.

  6. Choose Edit association.

    In the Gateway association section the State displays updating. When complete, the State changes to associated. This might take several minutes or longer to complete.

To associate a transit gateway using the command line or API
To view the transit gateways associated with a Direct Connect gateway using the command line or API
To disassociate a transit gateway using the command line or API
To update allowed prefixes for a transit gateway using the command line or API
PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.