Share resources across Availability Zones in Amazon VPC Transit Gateways - Amazon VPC
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Share resources across Availability Zones in Amazon VPC Transit Gateways

To ensure that resources are distributed across the Availability Zones for a Region, Amazon VPC Transit Gateways independently map s Availability Zones to names for each account. This could lead to Availability Zone naming differences across accounts. For example, the Availability Zone us-east-1a for your Amazon account might not have the same location as us-east-1a for another Amazon account.

To identify the location of your multicast domain relative to your accounts, you must use the Availability Zone ID (AZ ID). The AZ ID is a unique and consistent identifier for an Availability Zone across all Amazon accounts. For example, use1-az1 is an AZ ID for the us-east-1 Region and it is the same location in every Amazon account.

To view the AZ IDs for the Availability Zones in your account

  1. Open the Amazon RAM console at https://console.amazonaws.cn/ram/home.

  2. The AZ IDs for the current Region are displayed in the Your AZ ID panel on the right-hand side of the screen.