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).

Prerequisites for instance topology

Before you describe the instance topology for your instances, ensure that your instances meet the following requirements.

Amazon Web Services Regions

Supported Amazon Web Services Regions:

Instance types

Supported instance types:

To see the available instance types in a specific Region

The available instance types vary by Region. To see if an instance type is available in a Region, use the describe-instance-types-offerings command with the --region parameter. Include the --filters parameter to scope the results to the instance family or instance type that you're interested in and the --query parameter to scope the output to the value of InstanceType.

aws ec2 describe-instance-type-offerings \
    --region us-east-2 \
    --filters 'Name=instance-type, Values=trn1*' \
    --query 'InstanceTypeOfferings[].InstanceType'

Expected output

[
    "trn1.2xlarge",
    "trn1.32xlarge",
    "trn1n.32xlarge"
]

Instance state

Instances must be in the running state. You can’t get instance topology information for instances that are in another state.

IAM permission

Your IAM identity (user, user group, or role) requires the following IAM permission: