AWS Interconnect : Simplifying Hybrid & Multicloud Networking

Introduction

If we look at cloud computing today, most things have become extremely easy.

We can launch servers in seconds.
We can deploy applications globally.

But when it comes to networking between environments—AWS, on-premises, or other cloud providers—it still tends to get complicated.

We often end up dealing with:

• VPN configurations

• Latency and performance issues

• Multiple vendors and dependencies

• Complex routing setups

This is exactly the gap that AWS Interconnect is trying to address.

What is AWS Interconnect?

AWS Interconnect is a fully managed private connectivity service that allows us to connect:

• AWS with other cloud providers

• AWS with our on-premises infrastructure

At a high level, it enables us to build secure, high-speed, and reliable network connections across different environments without relying on the public internet.

The key idea is simple:
We don’t have to deal with the complexity of traditional networking anymore.

Instead of manually configuring routers, setting up BGP sessions, coordinating with colocation providers, or managing multiple connectivity layers, AWS abstracts all of this into a single managed service.

From our perspective, we simply choose the required region, bandwidth, and connectivity type—while AWS and its partners handle provisioning, routing, redundancy, and maintenance in the background.

According to the official documentation, AWS manages the infrastructure, routing, and configuration, allowing us to focus on building applications rather than worrying about the underlying network complexity.

Understanding with a Simple Analogy

Think of traditional networking like traveling using public roads.

We share the road with everyone else, traffic is unpredictable, and delays are common.

Now compare that with a private expressway built only for us.

That is what AWS Interconnect provides—a dedicated, private path for our data, without going through the public internet.

Why AWS Interconnect Matters

Simplified Network Architecture

Traditionally, connecting environments required stitching together multiple components—VPNs, routers, and third-party services.

With AWS Interconnect, our traffic flows through the AWS global backbone directly to the destination.

It feels like moving from multiple connecting flights to a direct flight between two cities.

Faster Provisioning

Setting up enterprise-grade connectivity used to take days or even weeks.

With Interconnect, we can provision connections in minutes and adjust bandwidth without rebuilding the setup.

Fully Managed Infrastructure

AWS and its partners handle:

• Hardware

• VLAN configurations

• Routing setup (BGP)

• Maintenance

This allows us to focus on applications rather than infrastructure.

Built-in Resiliency

Each Interconnect is designed with redundancy across multiple devices and locations.

This ensures high availability and removes single points of failure.

Two Types of AWS Interconnect

Interconnect – Multicloud

This allows us to create private, high-speed connectivity between AWS and other cloud providers without using the public internet.
It ensures predictable performance and secure communication across cloud environme

Use cases:

• Data exchange between clouds

• Running workloads across multiple cloud platforms

Interconnect – Last Mile

This connects our on-premises infrastructure (data centers, branch offices) directly to AWS through partner networks.
It simplifies hybrid connectivity by removing the need for complex manual network setup.

Use cases:

• Hybrid cloud

• Enterprise integration

How AWS Interconnect Works

Step-by-Step Flow

1. We create an Interconnect from the AWS Console

2. AWS generates an activation key

3. The provider uses the key to approve the request

4. AWS and the provider automatically provision everything

Once completed, the connection becomes active.

Key Components to Understand

Interconnect

The Interconnect is the logical connection created between AWS and an external environment (another cloud or on-prem).
It abstracts all the underlying complexity and presents a single managed connectivity object.

Direct Connect Gateway

This acts as a central routing hub that connects the Interconnect to AWS resources like VPCs, Transit Gateway, or Cloud WAN.
It helps us manage connectivity across multiple regions and networks in a scalable way.

Activation Key

The Activation Key is a secure token generated during setup to validate the connection between AWS and the provider.
It ensures that both sides approve the connection before provisioning begins.

Architecture Integration

AWS Interconnect integrates seamlessly with key AWS networking services, allowing us to design both regional and global connectivity architectures.

• Virtual Private Gateway (VGW)
  This is suitable for simpler, region-specific setups where we connect a single VPC to external networks.
  It works well for straightforward hybrid use cases with limited complexity.

• AWS Transit Gateway (TGW)
  Transit Gateway acts as a central routing hub within a region, connecting multiple VPCs and networks.
  For cross-region connectivity, additional configurations like TGW peering are required.

• AWS Cloud WAN
  Cloud WAN enables global connectivity across regions through a unified network.
  It simplifies routing by allowing different regions to communicate seamlessly without complex interconnections.

As shown in the diagram below, traditional regional architectures require additional configurations for cross-region communication.
However, with Cloud WAN, we can build a globally connected network where traffic can flow seamlessly across regions through a centralized architecture.

Monitoring and Observability

Amazon CloudWatch : We can monitor AWS Interconnect using Amazon CloudWatch for metrics like latency, packet loss, and bandwidth utilization.
AWS CloudTrail helps track API activity and configuration changes for auditing and troubleshooting.

Pricing Overview

Pricing Factors

Pricing primarily depends on the bandwidth selected and the geographic scope of connectivity.
Higher bandwidth and longer-distance connections generally result in higher costs.

AWS follows a single hourly pricing model, and there are no additional data transfer charges for using Interconnect.

Tier-Based Pricing Model

While the tier-based model gives us a high-level understanding of pricing, things become more interesting when we look at real-world deployment scenarios.

In practice, pricing is influenced not just by distance, but also by how our architecture is designed—especially when we connect across regions or multiple cloud environments.

The diagram below illustrates how different connectivity patterns can impact the pricing tier, depending on how traffic flows across the network.

When Should We Use AWS Interconnect?

We should consider AWS Interconnect in the following scenarios:

• We need consistent, low-latency connectivity
  When applications require predictable performance and minimal latency, especially for real-time or data-intensive workloads.

• We are building multi-cloud architectures
  When workloads span across AWS and other cloud providers and need secure, private communication between them.

• We want to avoid public internet exposure
  When security is a priority and we want traffic to flow over private networks instead of the public internet.

• We need high bandwidth (Gbps level)
  When handling large volumes of data such as backups, analytics, or data replication between environments.

• We are running mission-critical or regulated workloads
  When uptime, reliability, and compliance are essential, such as in finance, healthcare, or government use cases.

Interconnect vs Direct Connect vs VPN

Quick Understanding

• VPN → Fast to set up, but unpredictable

• Direct Connect → Dedicated AWS connection

• Interconnect → Next-level: connects AWS with everything (clouds + on-prem)

Important Design Considerations

While AWS Interconnect simplifies connectivity, we still need to design a few foundational aspects carefully to ensure reliability, performance, and security across layers.

Network Layer (IP Address Planning)

At the core, we must ensure that CIDR ranges across AWS, on-prem, and other cloud environments do not overlap.
Overlapping IPs create ambiguity in routing, leading to traffic not reaching the intended destination.

Data Transport Layer (MTU Consistency)

At the transport level, MTU consistency becomes critical for smooth data flow.
If different environments use different MTU values, it can result in packet fragmentation, drops, or degraded performance.

Routing Layer (Traffic Flow Design)

Even with connectivity established, traffic will only flow correctly if routing is properly designed.
We need to ensure correct route propagation and clearly defined paths to avoid blackholes or misrouted traffic.

As shown in the diagram below, AWS Interconnect operates across multiple layers—from physical encryption (MACsec) to identity (IAM) and secure transport (TLS).

In the same way, our network design must also be layered and consistent, ensuring that each layer—from IP planning to routing—works together seamlessly.

Real-World Use Cases

Multi-cloud architectures : We can use AWS Interconnect to enable seamless communication between AWS and other cloud providers. This is useful when different teams or workloads are distributed across clouds but still need low-latency, private connectivity.

Disaster recovery across clouds : Interconnect helps us build cross-cloud DR strategies, where backup environments exist in another cloud provider. In case of failure, data and workloads can failover smoothly without relying on the public internet.

Hybrid cloud setups : We can connect on-premises data centers and branch offices directly to AWS using Interconnect. This is ideal for enterprises gradually migrating to the cloud while still maintaining legacy systems.

High-performance data transfer : For workloads involving large-scale data movement (analytics, AI/ML, backups), Interconnect provides predictable and high-speed connectivity. This avoids bottlenecks and inconsistencies typically seen with internet-based transfers.

Regulated environments : Organizations with strict compliance requirements can use Interconnect to ensure private, secure connectivity without internet exposure. This is especially relevant for industries like finance, healthcare, and government.

Final Thoughts

AWS Interconnect is not just another networking service.

It simplifies one of the most complex parts of cloud architecture—connectivity.

It also shows how AWS is evolving into a central networking layer across multiple environments, not just a single cloud provider.

Endcard

Thank you for taking the time to go through this blog on AWS Interconnect.

I hope this gave you a clear understanding of how AWS is simplifying hybrid and multi-cloud connectivity, and how we can approach networking in a more streamlined way.

If you found this helpful, feel free to share your thoughts or experiences—I would genuinely like to hear how you are approaching cloud networking today.

You can connect with me on LinkedIn: rupak1chakraborty

I’ll be sharing more such practical insights around AWS, cloud architecture, and real-world implementations.

Stay tuned for more such content...👋🔍🌈