AWS-Transit Gateway

• AWS Transit Gateway is a service that allows customers to connect their VPCs & their on-premises networks to a single gateway.

• It supports dynamic and static routing between attached Amazon VPCs and VPNs.

• It doesn’t support routing between Amazon VPCs with overlapping CIDRs.

• It inherits compliance from VPC & meets the standards for PCI DSS Level 1, ISO 9001, ISO 27001, ISO 27017, ISO 27018, SOC 1, SOC 2, SOC 3, FedRAMP Moderate, FedRAMP High and HIPAA eligibility.

• It supports attaching VPCs with IPv6 CIDRs.

• Users cannot use the same ASN for the Transit Gateway and the Direct Connect gateway.

• Partners like Cisco, Aruba, Silver Peak & Aviatrix are supporting AWS Transit Gateway network manager.

• Transit Gateway network manager offers built-in event notifications for network topology changes, routing updates & connection status updates.

• Users can segment their network by creating multiple route tables in Transit Gateway and associate VPCs and VPNs to them.

• Users can route multicast traffic within & between VPC attachments to a Transit Gateway.