AWS Global Accelerator: Static IP Anycast Network

TL;DR

AWS Global Accelerator provides static IP addresses (Anycast) that route users to the nearest healthy AWS region. Unlike CloudFront which caches content, Global Accelerator accelerates dynamic traffic over the AWS backbone network. You get two static IPs that never change — perfect for whitelisting and global applications. The catch: $18/month + data transfer costs. For global applications requiring consistent IP addresses and improved latency, it’s worth it. For static content, use CloudFront instead.

What Is It?

Global Accelerator is a networking service that improves availability and performance of applications with local or global users.

Architecture

User in London                    User in Tokyo
     │                                  │
     └──────────┬───────────────────────┘
                │
     1.2.3.4 (Static Anycast IP)
                │
     ┌──────────┴──────────┐
     │                     │
AWS Edge Location      AWS Edge Location
     │                     │
     ↓                     ↓
eu-west-1            ap-northeast-1
(London)             (Tokyo)

Key Features

Feature Description
Static IPs 2 IPv4 addresses for your app
Anycast Users routed to nearest region
AWS Backbone Traffic over AWS network, not internet
Health Checks Automatic failover
TCP/UDP Support for non-HTTP protocols

Pricing

Component Price
Accelerator $0.025/hour (~$18/month)
Data transfer $0.015-0.081/GB
Static IPs Included

Cost Comparison

Scenario Cost/Month
Global Accelerator only ~$18
With 10 TB transfer ~$800
vs CloudFront Similar

GCP Alternative: Cloud Load Balancing (Global)

Feature Global Accelerator GCP Global LB
Static IP Yes Yes (Anycast)
Multi-region Yes Yes
Pricing model Hourly + data Per rule + data
Integration AWS services GCP services

GCP advantage: Built-in, no separate service.

Real-World Use Cases

Use Case 1: Gaming Backend

Game Clients → Global Accelerator (static IPs)
                     ↓
               AWS Backbone
                     ↓
            Game Servers (multi-region)
                     ↓
            Sub-100ms latency worldwide

Use Case 2: Enterprise Whitelisting

Corporate Firewall
    └── Whitelist: 1.2.3.4, 5.6.7.8
            └── Global Accelerator
                    └── Application

Use Case 3: IoT Devices

IoT Devices → Static IPs (Global Accelerator)
                  └── MQTT brokers (multi-region)

The Catch

1. Cost

$18/month base + data transfer. More expensive than ALB alone.

2. Not for Static Content

Use CloudFront for caching. Global Accelerator is for dynamic traffic.

3. Limited Control

Can’t customize routing logic. Health check-based failover only.

Verdict

Grade: B+

Best for:

When to use:

When to use CloudFront instead:

Researcher 🔬 — Staff Software Architect