What is a private cloud interconnect?

What it is

A private cloud interconnect is a private network path between your network and a cloud provider. It runs through a carrier, a colo facility, or a cloud exchange instead of the public internet. Your traffic leaves your router on a port you control, crosses a cross-connect, and arrives at the cloud provider's edge. The provider hands it into your virtual network, such as a VPC or VNet.

The word private needs care. It means your packets do not cross public internet routers. It does not mean a single dark fiber just for you. Carriers and cloud providers share hardware and backbones. What you get is a reserved circuit with a service level agreement, a VLAN or routed handoff, and a clear demarcation point. That demarcation is where your responsibility ends and the provider's begins.

You will see several product names for the same idea: a dedicated connection from a cloud provider, a hosted connection from a carrier, or a virtual circuit on a cloud exchange. They differ in who owns the port, who runs BGP, and how long the order takes. The common thread is a private handoff into cloud networking, not a tunnel over the internet.

How it works

The physical path starts at your router. You need a port in a meet-me location, a colo where carriers and cloud providers connect. You order a cross-connect from your cage to the carrier or cloud exchange. The carrier then provisions a circuit to the cloud provider's edge. On a cloud exchange, the exchange maps your VLAN to the provider's virtual circuit.

The logical path is where most mistakes happen. A Layer 2 handoff gives you a VLAN, and you run BGP with the cloud provider or carrier. A Layer 3 handoff gives you an IP address, and the provider runs BGP for you. You need an IP plan, an autonomous system number, and a route policy. The cloud side has route limits, prefix limits, and allowed ASNs. Check those before you order.

Redundancy is part of how it works, not an add-on. Two circuits on the same router are not diverse. Two circuits in the same conduit are not diverse. You want two ports, two devices, two meet-me locations if possible, and two BGP sessions. Test failover by shutting one path down and watching routes move. Check MTU too: the cloud handoff may support 1500 bytes or jumbo frames, but your carrier and router must match.

Why it matters for a business

The main reason is predictable behavior. Internet paths change with congestion and outages. A private interconnect gives you a known path, a known latency range, and a known bandwidth limit. That helps for database replication, backup and restore, VoIP, video, and apps where jitter is felt by users.

Security posture improves in a narrow sense. Your cloud resources no longer need public IP addresses for your own traffic. You can keep private endpoints and private DNS inside the cloud network. But the interconnect is not encryption. If you need encryption, run IPsec over it or use TLS at the application layer. The private path reduces exposure. It does not replace authentication and segmentation.

The business trade-off is commitment. A private interconnect usually comes with a contract term, a lead time, and a monthly cost for the port and circuit. It is less flexible than a VPN when you add a site or change providers. Use it when you have steady traffic, a colo presence, or a latency-sensitive workload. Do not order it for a pilot that may end in a month.

Common mistakes

Ordering one circuit and calling it redundant. A second circuit from the same carrier on the same route is not a second path. Ask for diversity in writing, then check the route. Also check the cross-connect: two circuits can share one physical port or one patch panel.

Getting the logical details wrong. Overlapping IP ranges between your data center and cloud VPC will break routing. BGP ASN conflicts will drop sessions. A missing route policy can advertise more prefixes than the cloud allows. VLAN mismatches at the handoff are common. So is an MTU mismatch that only shows up when large packets hit.

Forgetting operations. Who monitors the BGP session? Who opens a ticket with the carrier? Where is the demarcation? What is the escalation path at 2 a.m.? If you do not document the handoff, your team will spend hours on the first outage. Measure utilization before you upgrade. Teams often buy more bandwidth when the real issue is a single flow or a bad route.

How to get started

Start with a traffic map. List the sites, cloud regions, and workloads that need the private path. Note peak throughput, latency tolerance, and growth for the next year. Decide if you need one cloud or several. That drives whether you use a cloud provider's direct product, a carrier, or a cloud exchange.

Pick a meet-me location close to your sites or your cloud region. Check which carriers and cloud providers are present. Choose a port speed with room to grow, but do not buy the top speed on day one. Decide Layer 2 or Layer 3 based on your team's BGP skills. Design two paths if the workload is production-critical.

Build an IP and ASN plan before you order. Reserve a /30 or /31 for the BGP peering, pick private ASNs, and list the prefixes you will advertise. Order the cross-connect first, then the virtual circuit, then the cloud side. Test with a ping and a BGP summary, then run a failover drill. If you want a second opinion before you sign, the Cloudverg Expert architecture session is a 90-minute call with a senior architect for $450 one-time, with a written summary. It is one option among others.

Frequently asked questions