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Common Problems of Leveraging Broadband as an Underlay



Embark on a journey into the intricacies of leveraging Broadband (BB) as an underlay for Software-Defined Wide Area Network (SD-WAN) with this case study. Let us explore the complexity of using broadband as an underlay to obtain the cost economics from this mechanism. Enterprises face unique hurdles in their transformation from MPLS to Broadband, like constraints of IP addresses, IPV4 scarcity and the operational intricacies associated with dealing with multiple local operators. 

Let us explore how the OneX solution helps resolve many of these challenges by providing an optimal migration plan to SD-WAN over BB underlays.

Common Problems of the BB Underlay

Leveraging Broadband (BB) as an underlay enables the development of a cost-effective foundation for Software-Defined Wide Area Networks (SD-WAN) through high throughputs and pervasive reach. However, the path is not without its challenges, weaving a host of complexities that demand careful consideration:

  • IP Address Constraints: Within the BB landscape, the typical allotment of /30 IP addresses is often constrained, owing to the Point-to-Point over Ethernet (PPPOE) technology. This creates difficulty in configuring applications requiring diverse IPs, such as the IPSec VPN and Direct Internet Access, leading to migration difficulties from existing MPLS networks to SDWAN solutions.
  • IPV4 Scarcity Woes: Traditional IPV4 ecosystem leads to scarcity of addresses for static IP-driven configurations. This scarcity not only leads to incremental costs but also causes procurement delays in migration. Additionally, depending on static IPs also delays the configuration of paths for SDWAN deployments, preventing you from fully leveraging the strength of SDWAN networks.
  • LAN IP conflicts: Broadband Service providers configure their LAN IPs as standard Thus, when using multiple service providers, failover of links can create an IP conflict as well as issues in any micro-segmentation features being used with the SDWAN solution.
  • Operational Lock-in Dilemmas: The reliance on operators for static IPs casts a shadow of operational lock-in, rendering flexibility a scarce commodity. Every change is a complex endeavor, making the operational landscape a challenging terrain to navigate.
  • Dependence on PPPoE: Increasingly, ISPs are migrating from GPON (Gigabit Passive Optical Network) technologies and, as a result, migrating to Dynamic Host control Protocol (DHCP). This makes configuration dependent on bridge modes using PPPoE unviable and requires ensuring that selected SDWAN architecture supports DHCP.

The OneX Solution

OneX by CelerityX steps to simplify several issues mentioned above to unlock the full potential of your SD-WAN solution.OneX helps you leverage the power of SD-WAN agnostic to WAN technologies, enabling predictable performance, optimized costs, simplified management, and robust security – all from a single, unified solution.

OneX Capabilities

OneX stands as a beacon of technological innovation, offering a suite of capabilities that redefine network reliability and performance. With its sophisticated features, OneX ensures unyielding connectivity:
  • Multiple Routing: OneX employs intelligent traffic distribution across multiple WAN links, steering clear of congestion pitfalls and potential outages.
  • Load Balancing: Dynamism is at the core of OneX, dynamically distributing traffic across a spectrum of WAN links, elevating overall network performance.
  • Failover: In the face of adversity, OneX seamlessly orchestrates a switch to a backup WAN link, safeguarding business continuity and operational resilience.
  • Health Monitoring: Operating as a vigilant guardian, OneX conducts proactive health checks on WAN links and connected devices, proactively addressing potential issues before they can escalate.


IP Persistence 

IP persistence allows the allocation of IP addresses to a location through a central pool without dependency on the service provider or the nature of WAN. 

Key benefits of IP persistence:

  • Simplified Routing: This feature allows for aggregation of bandwidth across WAN technologies and simplifies routing rules by creating a single Tunnel rather than 4 different routes for 2 WAN types.
  • Independence from Service provider: The IP Pools can be purchased by the customer on his own at economical prices, and this ensures that swapping out service providers will not require a change in configuration due to changing IPs
  • Leveraging SIM as WAN: Traditional SIM-based solutions lack static IP. IP persistence feature allows companies to leverage a SIM(s) only connectivity as a primary or backup link without worrying about migration from Static IP on primary fiber path vs migration to Dynamic IP on Mobile SIM networks.

IP persistence is the missing piece in your SD-WAN puzzle. It unlocks a world of operational freedom, unshackling you from the limitations of traditional solutions. With OneX, you can finally harness your SD-WAN’s full potential, confident in your connections’ unwavering strength.


Micro-segmentation allows for setting rules on the network based on LAN ports/Wi-Fi access points. This includes restrictions on access to applications, Mac-Binding and User access control through integration with Active user directories like Lightweight directory access protocol (LDAP). 

Benefits of Micro-Segmentation

  • Additional security layer: This feature allows for security adapted beyond generic firewall rules, allowing an additional layer for high-valued assets.
  • Agnostic to social phishing attacks: Mac Binding and access from specific LAN/ Access points ensure that despite social phishing-driven access to credentials, access to critical resources is denied without physical access to the machine/premises. 
  • Bandwidth usage optimization: User-based setting of specific rules and access to applications ensures that crucial users get high-priority access to bandwidth.

Micro-segmentation is a unique feature that goes beyond traditional on-prem or cloud-based next-generation firewalls by allowing customization of security policies at an individual/ team level. It prevents attacks enabled via social phishing by necessitating access to machines and networks during working hours.

Implementation and Outcomes

OneX is leading digital transformation in companies across BFSI, Manufacturing, Wind farms and Contact Centers, ensuring the widespread utility of the application. In all cases, OneX provides a seamless migration from existing MPLS-based underlays to a Leased Line/Broadband-based migration with enhanced routing policies that move beyond grouping applications into Class of Service (COS) to application-level rules. Notably, OneX demonstrates its prowess as single-box solutions featuring Unified Threat Management (UTM) capabilities enabling migration of on-site as well as cloud-based firewalls to a single solution, simplifying network architecture.

Embrace the future of WAN solutions with CelerityX’s OneX. Bid farewell to the constraints of MPLS and welcome a new era where your enterprise network adapts, grows, and keeps pace with the dynamic demands of the digital age.

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