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Zorluk: OrtaHybrid and Multi-Account Network Connectivity Design

A company is designing a hybrid network architecture for its multi-account AWS environment consisting of 20 VPCs spread across two AWS Regions. The architecture must enable any-to-any VPC-to-VPC communication and connect all VPCs to the company's on-premises data center. The connectivity design requires AWS Direct Connect as the primary connection, with a backup connection over the internet that automatically handles failover. The company wants to minimize administrative overhead. Which hybrid connectivity design meets these requirements?

  1. A
    Associate all VPCs directly with a centralized Direct Connect Gateway using Private Virtual Interfaces to route both hybrid and inter-VPC traffic. Establish backup Site-to-Site VPN connections to a Virtual Private Gateway in each VPC, utilizing BGP to route traffic.
  2. Deploy an AWS Transit Gateway in each AWS Region, peer the two Transit Gateways, and connect them to a centralized Direct Connect Gateway using Transit Virtual Interfaces. Establish backup Site-to-Site VPN connections to the Transit Gateways, configuring dynamic routing with BGP and AS-Path prepending to prefer the Direct Connect path.Cevap
  3. C
    Deploy peered AWS Transit Gateways in both Regions connected to a Direct Connect Gateway and a backup VPN. Create a Route 53 Private Hosted Zone for custom domain resolution and associate the hosted zone directly with the Transit Gateways to automatically enable DNS resolution for all connected VPCs.
  4. D
    Deploy peered AWS Transit Gateways in both Regions connected to a Direct Connect Gateway. Route all hybrid, VPC-to-VPC, and outbound internet traffic through a single NAT Gateway deployed in a public subnet of a centralized transit VPC in one Availability Zone to minimize NAT Gateway costs.

Cevap

Deploy peered AWS Transit Gateways connected to a Direct Connect Gateway via Transit VIFs, and set up backup Site-to-Site VPNs to the Transit Gateways using BGP with AS-Path prepending to prefer the Direct Connect path.
The correct design uses AWS Transit Gateways peered across Regions to enable scalable any-to-any VPC-to-VPC routing. By connecting the Transit Gateways to a centralized Direct Connect Gateway using Transit Virtual Interfaces, hybrid connectivity is established. Deploying Site-to-Site VPNs to the Transit Gateways with BGP dynamic routing and AS-Path prepending ensures the Direct Connect path is preferred during normal operation, while enabling automatic failover to the VPN backup when necessary.

Adım Adım Çözüm

1
Analyze routing requirements for multi-region VPC-to-VPC and hybrid connectivity.
Identify that AWS Transit Gateway is required because it natively supports transitive routing (any-to-any VPC communication), whereas a Direct Connect Gateway alone does not route traffic between attached VPCs.
To satisfy the requirement of any-to-any VPC communication across both AWS Regions.
2
Determine the configuration for primary and backup hybrid connections.
Connect the regional Transit Gateways to a centralized Direct Connect Gateway using Transit Virtual Interfaces (Transit VIFs) for the primary connection, and deploy AWS Site-to-Site VPN connections directly to the Transit Gateways for the backup connection.
Transit VIFs allow Transit Gateways to attach to a Direct Connect Gateway. Site-to-Site VPN attachments on the Transit Gateways allow backup hybrid traffic to scale across all associated VPCs.
3
Configure failover routing policy.
Use Border Gateway Protocol (BGP) dynamic routing on both the Direct Connect and VPN connections, and configure AS-Path prepending on the VPN connection on-premises.
AS-Path prepending makes the VPN path look longer, ensuring AWS prefers the Direct Connect path under normal operating conditions while facilitating automatic dynamic failover if the Direct Connect link fails.

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Hybrid and Multi-Account Network Connectivity Design using AWS Transit Gateway, Direct Connect Gateway, and dynamic VPN failover.
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Hybrid and Multi-Account Network Connectivity Design

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