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Building a Flexible, Intelligent, and Agile WAN

Traditionally, an enterprise with several branches would normally have a WAN that connects its branch offices to its central hub, HQ or Data Center. These branch sites connect to the central hub through private links like leased circuits or MPLS.

Tradition WAN

This type of design is common for enterprise networks, but it brings some issues:

  • Private WANs often used technology which required special proprietary hardware. However, enterprises today are demanding more flexible, open, and cloud-based WAN technologies, rather than installing proprietary or specialized WAN technology that often involves expensive, fixed circuits, or proprietary hardware.

  • Depending on a single WAN path or carrier has become a liability that enterprises should avoid when deploying and upgrading their WAN.

  • Some enterprises might apply other forms of WAN connections like broadband for backup purposes, which mostly stays idle and literally wastes the resources. Besides, a failover also meant all the current sessions would be lost and typically the failover process and timeframe was not ideal.

  • As enterprises move towards cloud-based services, traditional WANs based on conventional routers are not addressing the performance need for cloud applications. The reason being is that they typically require backhauling all traffic, including cloud and general web traffic, from branch offices to a central hub. Moreover, some enterprises have the mechanism of advanced security inspection deployed at the central hub. These things aforementioned will delay cloud applications, resulting in a poor user experience and lower productivity.

>  Hybrid WAN
MPLS still play an important role in enterprise network infrastructure today, while broadband bandwidth is more economical than it. Enterprises should be able to benefit from leveraging both WAN technologies. As shown above, hybrid WAN infrastructure is a great way for multi-location enterprises to leverage broadband WAN to ensure business continuity while maintaining performance for critical site-to-site applications. For multi-location enterprises that are connected with MPLS, hybrid WAN aims to support multiple connections to build site-to-site VPNs, offer dynamic and flexible WAN connectivity, reduce recurring costs, and improve overall network performance.

Hybrid WAN

>  Q-Balancer SD-WAN
Q-Balancer SD-WAN is designed to deliver a business-class, secure, and simple cloud-enabled WAN connection with as much open and software-based technology as possible. The solution provides bandwidth expansion as well as direct optimal access to enterprise and cloud applications, and data. Its architectures support on-premises and cloud deployments as illustrated below:

On-Premises Hybrid SD-WAN

Cloud Hybrid SD-WAN

As depicted in the diagrams above, the appliances are respectively deployed at both HQ and branch office. The public WANs (red and green) in this case can be ADSL broadband or wireless lines, while the private backhaul (blue) is with MPLS line. Cloud-based applications from branch office will be primarily directed out via public WANs without going back the HQ/ Data center site. Internet-bound traffic is offloaded from the private backhaul with a hybrid-cloud network that provides optimized path selection between public and private clouds. The delivery for those applications that are hosted at the data center is thus improved.

With Q-Balancer SD-WAN capabilities, enterprises create smart and responsive networks, which meets bandwidth demand in real time and actual network conditions. Critical applications have priority and all applications take the best-quality path through the network, ensuring continuity and quality so business can get done. Whether the WAN is all MPLS or a combination of MPLS and broadband lines, Q-Balancer SD-WAN solution ensures continuous availability and predictable application performance to keep productivity moving at optimal speed.

Cost Saving – Replace or augment the expensive MPLS WAN links with less expensive broadband links and still get the same user experience. As a result, enterprises should be able to invest more in low-cost broadband links and so as to minimize the cost of their expensive private links.

WAN Transports Agnostic– High amount of bandwidth capacity will be provided through WAN virtualization, which is faster than either one individually. Multiple locations within an enterprise being inter-connected via transport-agnostic WAN turns bandwidth and connectivity management from multiple carriers complexity into a competitive advantage.

Quick Provisioning – Branch networks and their relevant routing policies can be provisioned automatically. Besides, using broadband or wireless links is usually easier and faster to bring up MPLS links at remote sites. These advantages mean branch offices can be brought online faster than they would be using traditional MPLS links.

Intelligent Path Selection – Transparently leverage public and private links for seamless failover, increased throughput, and intelligent path selection. Monitor WAN links for the metrics such as bandwidth consumption, packet loss, delay, jitter, etc, and then decide the paths for certain type of traffic to maintain necessary level of quality. 

Network Simplification – Consolidate office infrastructure and potentially eliminate various network devices at branch networks with Q-Balancer's enterprise-grade features such as WAN failover & failback, WAN load balancing, VPN bonding, firewall, QoS, inbound load balancing, and overlay routing.

Centralized Control – Reduce administrative workload at the branch sites as management can be done from the HQ/Data Center site, leading to the minimal or quick configuration on branch devices.

Top Benefits

  • Reduced downtime with network failover

  • Improved bandwidth utilization

  • Increased application performance across public and private clouds

  • Transport agnostic

  • Increased WAN scalability

  • Cost saving

  • Minimized effort of appliance installation with zero-touch provisioning

  • Simplified branch networks with its all-in-one feature set

  • Visibility into entire network