Peplink: Complete Definition and Guide

What is Peplink?

Peplink is a network hardware manufacturer founded in 2006, specialising in SD-WAN and multi-WAN connectivity solutions for enterprises. Based in Hong Kong with offices worldwide, the company has established itself as a major player in the SD-WAN router market, particularly valued for the reliability of its equipment, the breadth of its features, and above all, the quality of its management API that enables complete automation of multi-site network lifecycle management.

What sets Peplink apart from other SD-WAN manufacturers is its vendor-agnostic approach to connectivity: a single Peplink appliance can aggregate fiber, DSL, 4G/5G, satellite (including Starlink), and MPLS links, regardless of provider. This flexibility is invaluable for businesses that want to diversify their connectivity sources without being locked into a single operator's ecosystem.

Peplink offers two main product ranges. The Balance range is designed for fixed sites (offices, retail shops, warehouses) with models ranging from the Balance 20X for small sites to the Balance 710 for headquarters requiring multi-gigabit aggregated throughput. The MAX range is dedicated to mobile environments (vehicles, construction sites, events) with integrated cellular connectivity. Both ranges are managed via the InControl 2 cloud platform, which provides centralised monitoring and remote configuration of the entire equipment fleet.

Why Peplink Matters

In the SD-WAN ecosystem, routers constitute the fundamental physical layer that determines the capabilities and performance of the entire network architecture. Choosing Peplink as SD-WAN equipment offers major strategic advantages.

• Complete RESTAPI: Peplink exposes a documented and stable REST API that allows reading configuration, modifying parameters, retrieving performance metrics, and triggering maintenance actions on each appliance. This API is the cornerstone of custom monitoring platforms.
• Proven reliability: Peplink appliances are recognised for their production stability, with uptimes measured in years. Failover mechanisms between WAN links are fast and transparent to users.
• Native multi-WAN connectivity: a single appliance simultaneously manages 2 to 13 WAN links depending on the model, with bonding (bandwidth aggregation), load balancing, and automatic failover.
• Large-scale centralised management: the InControl 2 platform enables managing hundreds of appliances from a single interface, but its customisation limitations drive enterprises to develop their own platforms via the API.
• Open ecosystem: unlike closed proprietary SD-WAN solutions, Peplink's open approach allows developers to build custom software layers on top of the hardware.

How It Works

A Peplink router functions as a network convergence point at each site. On the WAN side, it connects to all available links: fiber via the Ethernet WAN port, cellular connection via integrated 4G/5G modems (MAX range) or an external modem, and satellite via a Starlink terminal connected to an additional WAN port. On the LAN side, it provides connectivity to site equipment via Ethernet and Wi-Fi.

The appliance continuously measures the quality of each WAN link: latency, jitter, packet loss, and available bandwidth. Based on these metrics and configured routing policies, it makes real-time decisions to direct each data flow to the optimal link. SpeedFusion algorithms, Peplink's proprietary technology, enable VPN bonding (aggregating the bandwidth of multiple links into a single encrypted tunnel) and hot failover (switching without session interruption).

Peplink's REST API is accessible via HTTPS on each appliance and via the InControl 2 cloud platform. It enables automating common operations: provisioning new sites, modifying routing policies, collecting metrics for reporting, and triggering remote reboots. This API returns data in JSON format, easily consumed by Python applications or monitoring platforms built with Django.

For multi-site deployments, Peplink uses the concept of "profiles" that allow defining a standard configuration and deploying it to dozens or hundreds of appliances simultaneously via InControl 2 or via the API. Firmware updates can also be scheduled and deployed en masse.

Concrete Example

KERN-IT developed the Venn Telecom platform for a Belgian telecom operator managing over 25 retail shops equipped with Peplink Balance routers. Each shop has a Peplink appliance connected to two fiber links and a 4G backup. The Venn Telecom platform, built in Django, interacts directly with each Peplink appliance's REST API to collect performance metrics every minute: status of each WAN link, incoming and outgoing throughput, latency, and number of Wi-Fi-connected clients.

This data feeds a centralised dashboard that provides network teams with a real-time view of each shop's status. When a link drops or degrades, the platform detects the anomaly and sends an alert to technicians via the integrated notification system. Teams can then intervene remotely via the Peplink API without physically travelling to the site, which has reduced on-site interventions by 60%.

Beyond Venn Telecom, KERN-IT developed Kenobi, its vendor-agnostic SD-WAN platform that supports Peplink appliances among other equipment. Kenobi abstracts each manufacturer's specificities behind a unified interface, enabling operators to manage a heterogeneous router fleet from a single dashboard.

Implementation

1. Hardware sizing: choose the Peplink model suited to each site type. Balance 20X or 310X for small shops, Balance 380X or 580X for medium sites, Balance 710 for headquarters with high-throughput needs. MAX range for mobile sites.
2. Base network configuration: configure WAN interfaces (fiber, 4G, satellite), VLANs, DHCP, and firewall rules on each appliance. Use InControl 2 profiles to standardise configuration.
3. API activation: enable REST API access on each appliance and configure authentication tokens. Document the endpoints used for your specific use case.
4. Monitoring platform integration: develop connectors between your monitoring platform and the Peplink API. Implement periodic metric collection and storage in a time-series database.
5. Routing policy configuration: define per-application routing rules (VoIP traffic on the most stable link, web browsing in load balancing, satellite backup as last resort) and deploy them via the API or InControl 2.
6. Testing and validation: validate failover scenarios, SpeedFusion bonding, and monitoring alerts on a pilot site before general rollout.

Associated Technologies and Tools

• REST API: Peplink's programmatic interface enabling complete automation of router management, from configuration to monitoring to maintenance.
• Python: the preferred language for developing scripts that interact with the Peplink API, metric collectors, and network automation tools.
• Django: the framework used to build web monitoring platforms that leverage data collected from Peplink appliances, such as the Venn Telecom and Kenobi platforms developed by KERN-IT.
• Docker: containerisation of monitoring components (collectors, API, database) for reproducible and scalable deployment of management platforms.
• MQTT: a complementary protocol used for event-driven alert relay from remote sites to the centralised platform, complementing API polling.
• InControl 2: Peplink's native cloud platform for centralised router fleet management, providing a functional base that custom platforms enhance.

Conclusion

Peplink has established itself as a reference choice for multi-site SD-WAN deployments thanks to the robustness of its hardware and the richness of its REST API. For enterprises and telecom operators managing dozens or hundreds of sites, the added value lies in the monitoring and automation software layer built on top of Peplink appliances. This is precisely the approach KERN-IT takes with its Kenobi and Venn Telecom platforms: leveraging the power of the Peplink API through custom Django applications to deliver a level of control, visibility, and automation that the manufacturer's native tools cannot achieve alone.