Building Resilient and Robust Connectivity for Routing Protocols

> Overlay Routing 
Imagine that you would be requested to add 2 different subnets to your company network, which is with static route solution and consists of 100+ branch networks, because the management decided to open a new branch office. The labor-intensive manual modifications might be error-prone and a nightmare, and the process will be very long.

Dynamic routing can make your life much easier as it has an automatic process running between all routers as the routing protocols used in most business today were designed to solve the endpoint reachability problems in large networks. OSPF routing, for example, advertises the state of links to adjoining routers. Those advertisements are forwarded to the other routers in the network, giving every router the raw data for building a complete route table. The routers determine the shortest path by adding up the path costs for each segment – the lower the path cost, the shorter the path.

However, in a single-path routing network, if the path has issues, routing availability between remote sites and data centers will be lost. The overlay routing can provide resilient and robust connectivity to routing protocols. Administrator can establish overlay tunnels between the appliances at each site, and the appliances then automatically install individual routes for member interfaces into the overlay route table. The overlay route tables can fully replace or coexist with the existing routing infrastructure. This enables the Q-Balancer appliances to remove individual routes in the event of an interface outage and to divert all traffic to the remaining member interfaces without affecting the routing availability. If necessary, more overlay tunnels can be flexibly added for the dynamic routing protocols through leveraging low-cost broadband technologies. 

Top Benefits

  • Increased reliability with routing through overlay networks

  • Guaranteed full access redundancy by leveraging low-cost broadband technologies

  • Rapid response network brownouts and blackouts

  • Flexible configuration for branch network

  • Encryption for routing protocols

  • Reduced CAPEX and OPEX