Starlink: Complete Definition and Guide

What is Starlink?

Starlink is a satellite Internet access service developed and operated by SpaceX, the aerospace company founded by Elon Musk. Unlike traditional geostationary satellites positioned at 36,000 km altitude, Starlink uses a constellation of thousands of small satellites in Low Earth Orbit (LEO) between 340 and 550 km altitude. This proximity to the Earth's surface dramatically reduces latency, from 600 ms for a geostationary satellite to approximately 20 to 40 ms for Starlink, making it compatible with demanding professional uses such as video conferencing, VoIP, and real-time business applications.

The Starlink constellation now has over 6,000 active satellites in orbit, with the goal of deploying tens of thousands more. The service is available in over 70 countries, including Belgium and across Europe. For businesses, SpaceX offers Starlink Business, a plan with higher speeds, a static IP address, and priority support, specifically designed for professional deployments and multi-link network architectures.

The arrival of Starlink in the enterprise connectivity market is disrupting traditional approaches to wide area networking. Where fiber is unavailable or MPLS deployment too costly, Starlink provides a credible alternative that integrates naturally into modern SD-WAN architectures as a primary or backup link.

Why Starlink Matters

The emergence of Starlink as a viable WAN link for enterprises is transforming how multi-site networks are designed and managed. Its importance manifests across several strategic dimensions.

• Universal coverage: Starlink enables connecting sites that were previously dependent on unstable 4G connections or limited DSL links. Rural areas, temporary construction sites, remote industrial facilities, and mobile events now have access to reliable high-speed Internet.
• Network redundancy: in an SD-WAN architecture, Starlink serves as an ideal backup link. If fiber and 4G fail simultaneously, satellite automatically takes over, ensuring service continuity for critical applications.
• Rapid deployment: installing a Starlink terminal takes less than an hour, compared to several weeks for a dedicated fiber link. This speed is a major asset for large-scale multi-site deployments.
• Operator independence: by adding Starlink to the connectivity mix, businesses reduce their dependence on a single telecom operator and gain resilience against terrestrial infrastructure outages.
• Controlled costs: the Starlink Business subscription remains competitive compared to an MPLS link or leased line, especially for sites where terrestrial infrastructure is limited or non-existent.

How It Works

The Starlink system is based on a three-layer architecture. The first is the LEO satellite constellation: thousands of satellites orbiting Earth at low altitude, interconnected by inter-satellite laser links. Each satellite covers a limited geographic area and moves rapidly, requiring a dense mesh to ensure continuous coverage.

The second layer consists of ground stations that connect the constellation to terrestrial Internet infrastructure. These stations are strategically distributed to minimise latency between the satellite and the nearest Internet peering point.

The third layer is the user terminal, commonly known as "Dishy McFlatface." This motorised phased-array terminal automatically orients itself toward the optimal satellite and manages handover between satellites as they move across the sky. The terminal connects to the enterprise LAN via a standard Ethernet port, allowing it to be plugged directly into an SD-WAN router like any other WAN link.

In the context of an SD-WAN deployment, the Starlink link is configured as an additional WAN interface on the site's SD-WAN appliance. The SD-WAN controller continuously measures the satellite link's metrics (latency, jitter, bandwidth, packet loss) and incorporates them into its routing decisions. Critical traffic stays on fiber when available but automatically fails over to Starlink if degradation or an outage occurs.

Concrete Example

KERN-IT developed a centralised Starlink fleet management tool for a telecom operator. The platform covers the entire Starlink terminal lifecycle: subscription management, centralised telemetry collection from each terminal, basic alerts in case of service degradation, and custom plan management per client.

The tool also integrates terminal provisioning (activation, configuration, site assignment) and usage calculation and billing. Each operator can monitor bandwidth consumption per terminal in real time, visualise satellite performance metrics, and automatically generate billing statements for their clients. This centralisation replaces manual management via the Starlink portal, which becomes unmanageable once the fleet exceeds a few dozen terminals.

Implementation

1. Coverage assessment: verify Starlink availability at your target sites using the online coverage tool. Identify sites where Starlink provides real added value (no fiber, backup needed, rapid deployment required).
2. Plan selection: choose the subscription suited to your use case (Starlink Business for professional deployments with static IP and priority support, Starlink Standard for secondary sites).
3. Terminal installation: position the Dishy terminal with a clear view of the sky (no obstructions above 25 degrees from the horizon). The Starlink app enables scanning the location and identifying potential obstructions.
4. SD-WAN integration: connect the Starlink terminal to your SD-WAN appliance's WAN port. Configure the link with appropriate priorities and routing policies in your SD-WAN controller.
5. Monitoring configuration: integrate the Starlink link into your monitoring platform to track its performance in real time. Set alert thresholds for latency, bandwidth, and availability.
6. Failover testing: validate failover scenarios by simulating outages on primary links to verify that failover to Starlink is automatic and transparent for users.

Associated Technologies and Tools

• SD-WAN: the essential network architecture for intelligently integrating Starlink as a complementary WAN link alongside fiber, MPLS, and 4G.
• Python: the language used to develop automation scripts for Starlink link monitoring and satellite performance metric analysis.
• Django: the web framework on which network monitoring platforms like Kenobi and Venn Telecom are built, integrating data from all WAN links including Starlink.
• REST APIs: interfaces used to query SD-WAN appliance metrics and aggregate performance data from each link, including satellite.
• MQTT: a lightweight messaging protocol used for real-time relay of network metrics from remote sites to the centralised monitoring platform.
• Docker: containerisation of monitoring and analytics components, facilitating deployment and updates of monitoring platforms on central servers.

Conclusion

Starlink represents a major advance in enterprise connectivity, offering a low-latency satellite WAN link accessible anywhere. Its integration into SD-WAN architectures enables multi-site businesses to guarantee optimal network availability, even in areas where terrestrial infrastructure is lacking. The added value, however, lies in the software layer that orchestrates and monitors all links: this is precisely KERN-IT's area of expertise, developing custom SD-WAN management platforms like Kenobi and Venn Telecom that natively integrate Starlink and other connectivity technologies into a unified dashboard.