Resource tags in AWS Global Networks for Transit Gateways - AWS Network Manager
Supported resourcesTagging restrictions

Resource tags in AWS Global Networks for Transit Gateways

A tag is a metadata label that either you or AWS assigns to an AWS resource. Each tag consists of a key and a value. For tags that you assign, you define the key and the value. For example, you might define the key as purpose and the value as test for one resource.

Tags help you do the following:

  • Identify and organize your AWS resources. Many AWS services support tagging, so you can assign the same tag to resources from different services to indicate that the resources are related.

  • Control access to your AWS resources. For more information, see Controlling access to AWS resources using tags in the IAM User Guide.

Supported resources

The following global networks resources support tagging:

  • Global networks

  • Devices

  • Sites

  • Links

Tagging restrictions

The following basic restrictions apply to tags on global networks resources:

  • Maximum number of tags that you can assign to a resource: 200

  • Maximum key length: 128 Unicode characters

  • Maximum value length: 256 Unicode characters

  • Valid characters for key and value: a-z, A-Z, 0-9, space, and the following characters: _ . : / = + - and @

  • Keys and values are case sensitive

  • You cannot use aws: as a prefix for keys; it's reserved for AWS use