AWS and Azure Expand Native Multicloud Interconnect with MACsec Encryption

AWS and Microsoft Azure announced the public preview of AWS Interconnect – multicloud connectivity for Microsoft Azure. The collaboration allows enterprise teams to provision private, high-bandwidth interconnects between AWS VPCs and Azure VNets directly through the AWS Management Console, CLI, or API in minutes. The managed architecture incorporates native line-rate MACsec encryption to safeguard cross-cloud data in transit, standardizes on an open interoperability specification, and deploys across a quad-redundant topology featuring four independent logical paths. Initial availability spans key regions including US East (N. Virginia), US West (N. California), Europe (Frankfurt), and Asia Pacific (Sydney), accompanied by integrated Network Synthetic Monitoring at zero additional cost. Historically, interconnecting workloads across disparate hyperscalers presented a classic security-versus-complexity dilemma. Network engineers had to choose between maintaining bespoke IPsec VPN meshes—which introduce latency, CPU overhead, and MTU fragmentation—or managing physical co-location cross-connects via third-party telecom providers. These legacy patterns frequently created blind spots in egress inspection, inconsistent compliance enforcement, and exposed attack surfaces to routing leaks. By establishing native, hardware-encrypted private peering directly at the cloud edge, organizations can maintain continuous zero-trust boundary isolation across hybrid and multicloud estates without routing sensitive payloads across the public internet. This release marks a significant milestone in hyperscaler interoperability and data plane commoditization. Following prior integrations with Google Cloud and Oracle Cloud Infrastructure under AWS's open interconnect framework, Azure's participation closes the loop across the major cloud service providers. As enterprises increasingly distribute AI inference pipelines, distributed database clusters, and active-active disaster recovery architectures across multiple cloud providers, hyperscalers are recognizing that vendor lock-in strategies at the networking layer hinder enterprise adoption. Transparent, encrypted cross-cloud fabric is transitioning from an exotic architecture into standard cloud plumbing. Practitioners designing cross-cloud topologies should immediately evaluate where managed interconnects can replace legacy SD-WAN appliances and third-party transit hubs. Begin by auditing cross-cloud data flows for compliance risks, especially workloads subject to strict data-in-transit cryptographic standards like HIPAA or PCI-DSS that require link-layer encryption. While native MACsec removes the encryption compute penalty, teams must still implement unified routing governance, IP address management (IPAM) to prevent CIDR overlaps, and centralized egress filtering to prevent unmonitored lateral movement between environments.