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    Multi-cloud networking: connecting AWS, Azure and GCP without surprises

    TechLeague Editorial··8 min read

    Multi-cloud networking is rarely a feature decision — it's an IP, DNS and observability decision.

    Connectivity

    • Megaport / Equinix Fabric for L3 between clouds.
    • Direct Connect/ExpressRoute/Cloud Interconnect terminate at the same colo.

    Transit

    • AWS TGW, Azure vWAN, GCP NCC as regional spines.
    • BGP between them.

    IP planning

    • Document RFC1918 allocations across clouds.
    • Avoid overlap with on-prem; reserve space for future regions.

    DNS

    • Conditional forwarding from each cloud's resolver.
    • Private hosted zones for shared services.

    Observability

    • Flow logs to a single SIEM.
    • Synthetic probes between clouds for SLA.

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