UBonding Hot Failover

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Network downtime costs money and impacts productivity. Redundant internet connections have long been standard for data centers and enterprise networks, but are relatively rare in homes and small offices. With UBonding’s SD-WAN failover policy, it is possible to seamlessly and automatically switch to a reliable backup WAN interface when the primary connection fails.


In network communication, Failover is the process of transferring the tasks from one WAN interface to a redundant WAN interface to avoid disruption and maintain operations. A router with two internet connections provides many advantages, including better network performance and continued operation if one link fails. If there are any change in the online status of the primary WAN interfaces, the secondary WAN interface will takeover the operations of the primary.

UBonding Failover is performed by monitoring each WAN interface and can automatically route outbound traffic to another WAN interface if the first WAN interface loses connectivity. When we have multiple WAN interface connections and the router needs to control the traffic that goes through specific interfaces, it handles multiple levels of primary and backup interfaces. UBonding dynamically manages access via two or more uplinks, to ensure that the links are working and when necessary, it uses channel-bonding where a single connection (e.g., a single download) uses multiple connections simultaneously.


UBonding has two types of failover policies:

•     Failover to Round Robin: When you have 1 primary and 2 secondary connection and when the primary connection goes down, the traffic will be distributed across secondary connections in a round robin fashion. Each interface in the primary/secondary connection gets an equal share of outgoing traffic.

•     Failover to Bandwidth Boosting: When you have 1 primary and 2 secondary connections and when the primary connection goes down, the traffic will be distributed across secondary connections using bandwidth boosting. The interface with the lowest workload will be used to send outgoing traffic to increase the network throughput.

In conclusion, UBonding Failover is a simple and cost-effective solution for SMEs and Enterprises to enjoy stable network connectivity and seamless operations even when the available network connections are flaky andunreliable.

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