Automatic network connection recovery in the presence of multiple network interfaces

A computerized method for recovering network connectivity comprising:

• detecting an acknowledgement failure for a connection using a first route over a first network interface;
• in response to detecting the acknowledgement failure, incrementing a suspect reachability count of a path associated with the connection;
• identifying a second route as an alternative to the first route when the suspect reachability count of the path exceeds a suspect reachability threshold;
• moving the path to the identified second route and incrementing a moved path count of the first route when the identified second route is over the first network interface;
• incrementing an unreachable path count of the first route when the identified second route is over a second network interface;
• marking the first route as dead when a sum of the unreachable path count of the first route and the moved path count of the first route exceeds a bad path threshold, the bad path threshold based on a total path count associated with the first route;
• and
• transitioning, based on the marking, the connection using the first route over the first network interface to use the second route when the second route is over the second network interface.

One or more computer storage media having computer-executable instructions for recovering network connectivity that, upon execution by a processor, cause the processor to at least:

• detect a failure of a connection using a first route over a first network interface;
• in response to detecting the failure, increment a suspect reachability count of a path associated with the connection;
• identify a second route over a second network interface as an alternative to the first route when the suspect reachability count of the path exceeds a suspect reachability threshold;
• increment an unreachable path count of the first route based on the identified second route;
• mark the first route as dead when a sum of the unreachable path count of the first route and a moved path count of the first route exceeds a bad path threshold, the bad path threshold based on a total path count associated with the first route;
• and
• transition the connection, in response to marking the first route as dead, from the first route over the first network interface to the second route over the second network interface.