🌐 AWS Hybrid Connectivity Options

🔐 VPN Connection

Best for: Quick setup, small to medium workloads

Bandwidth: Up to 1.25 Gbps per tunnel

Cost: Low ($36-72/month)

Setup Time: Minutes to hours

⚡ Direct Connect

Best for: High bandwidth, consistent performance

Bandwidth: 1 Gbps to 100 Gbps

Cost: High ($216-2,000+/month)

Setup Time: Weeks to months

🚀 Transit Gateway

Best for: Complex multi-VPC architectures

Bandwidth: Up to 50 Gbps per attachment

Cost: Medium ($36/month + data processing)

Setup Time: Hours

🌊 PrivateLink

Best for: Service-to-service connectivity

Bandwidth: Up to 40 Gbps

Cost: Medium ($7.20/month + data processing)

Setup Time: Hours

📊 Comparison Overview

Solution	Bandwidth	Latency	Reliability	Cost	Setup Complexity	Use Case
Site-to-Site VPN	Up to 1.25 Gbps	Variable (Internet)	99.95% SLA	Low	Low	Branch offices, backup connectivity
Direct Connect	1-100 Gbps	Low, consistent	99.99% SLA	High	Medium	Data centers, high bandwidth needs
Transit Gateway	50 Gbps per attachment	Low	99.95% SLA	Medium	Medium	Multi-VPC, complex routing
PrivateLink	Up to 40 Gbps	Very Low	99.99% SLA	Medium	Low	Service connectivity, microservices

🔐 1. Site-to-Site VPN

Site-to-Site VPN Architecture

On-Premises
Data Center

VPN Tunnel
(IPSec)

Virtual Private
Gateway

AWS VPC

Step-by-Step Setup

1 Create Customer Gateway

aws ec2 create-customer-gateway \
    --type ipsec.1 \
    --public-ip 203.0.113.12 \
    --bgp-asn 65000 \
    --tag-specifications 'ResourceType=customer-gateway,Tags=[{Key=Name,Value=MyCustomerGateway}]'
            

2 Create Virtual Private Gateway

aws ec2 create-vpn-gateway \
    --type ipsec.1 \
    --amazon-side-asn 64512 \
    --tag-specifications 'ResourceType=vpn-gateway,Tags=[{Key=Name,Value=MyVPNGateway}]'

# Attach to VPC
aws ec2 attach-vpn-gateway \
    --vpn-gateway-id vgw-12345678 \
    --vpc-id vpc-12345678
            

✅ Pros

Quick setup (minutes to hours)
Cost-effective for smaller workloads
Built-in redundancy (2 tunnels)
No additional hardware required
Encrypted traffic

⚠️ Cons

Bandwidth limited to 1.25 Gbps
Variable latency (Internet-dependent)
May have packet loss during peak times
Requires compatible on-premises equipment

🎯 Key Takeaways

Choose your hybrid connectivity solution based on bandwidth needs, budget constraints, and architectural complexity. Start simple with VPN, scale to Direct Connect for performance, and use Transit Gateway for complex multi-VPC environments.