ExpressRoute
Definition
Azure's service for creating private, high-speed connections between your on-premises networks and Microsoft's cloud, ensuring reliable data transfer.
Use Cases
- Microsoft: Hybrid connectivity for enterprise workloads that integrate on-premises systems with Azure services (e.g., identity, management, and application hosting). — Uses private connectivity patterns (including ExpressRoute in customer reference architectures) to connect datacenters/colocation environments to Azure with BGP routing, enabling predictable network paths and separation from the public internet. (More consistent network performance for hybrid applications and improved control over connectivity compared with internet-based paths.)
- Adobe: Enterprise-grade connectivity between colocation/on-premises environments and public cloud for production services and data movement. — Uses dedicated private connectivity offerings from cloud providers (such as Azure ExpressRoute equivalents) via colocation/partner connectivity to establish private BGP-routed links for high-throughput, lower-variance traffic. (Improved reliability and throughput for large-scale data transfers and service-to-service connectivity compared with relying solely on public internet links.)
- SAP: Secure, predictable connectivity for enterprise customers integrating SAP landscapes with hyperscale cloud services. — Commonly supports architectures where customers use private connectivity (e.g., ExpressRoute/Direct Connect/Interconnect equivalents) from customer networks or colocation sites into cloud environments to keep traffic off the public internet and stabilize latency. (Better network predictability for business-critical workloads and easier alignment with enterprise connectivity and compliance expectations.)
Provider Equivalents
- AWS: AWS Direct Connect
- Azure: Azure ExpressRoute
- GCP: Cloud Interconnect
- OCI: FastConnect
Frequently Asked Questions
- What's the difference between ExpressRoute and a Site-to-Site VPN?
- ExpressRoute is a private connection into Microsoft’s network (through a connectivity provider or at a colocation facility) and does not traverse the public internet. A Site-to-Site VPN uses encrypted tunnels over the public internet. VPNs are usually faster to set up and cheaper for smaller needs, while ExpressRoute is typically chosen for higher bandwidth, more consistent performance, and private connectivity requirements.
- When should I use ExpressRoute?
- Use ExpressRoute when you need private connectivity to Azure with more predictable performance than internet VPNs, higher bandwidth (often for large data transfers or many users), or when your organization requires private network paths for security/compliance or operational reasons. It’s also common for hybrid architectures where on-premises systems must reliably communicate with Azure-hosted applications and services.
- How much does ExpressRoute cost?
- Costs depend on factors such as the ExpressRoute circuit bandwidth (port speed), the connectivity model (via an ExpressRoute partner/provider or ExpressRoute Direct at a peering location), the pricing plan (metered vs. unlimited, where available), and any provider/colocation cross-connect fees. You should also account for associated networking components (e.g., ExpressRoute gateway in Azure) and data transfer patterns that may affect overall spend.
Category: networking
Difficulty: advanced
Related Terms
See Also