AWS – AWS Direct Connect support for 4-byte Autonomous System numbers for Virtual interfaces

AWS Direct Connect now supports 4-byte Autonomous System (AS) numbers for virtual interfaces. Direct Connect uses the standard Border Gateway Protocol to provide customers with private connectivity to the AWS global network. However, customers with complex, multi-tenant network topologies or who need to maintain consistent AS numbering across their entire network can run into challenges with the maximum limit of 65,536 possible 2-byte AS numbers. With 4-byte AS numbers, customers can now use the entire range supported by RFC 6793, up to 4,294,967,294.
Support for 4-byte AS numbers is now available in all AWS regions globally and on all Direct Connect virtual interface types. To get started, visit the AWS Direct Connect Console or use the updated APIs to create virtual interfaces with the new 4-byte AS numbers. For more information, check out the AWS Direct Connect documentation.

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