Routing network traffic

At least one non-transitory computer readable medium storing instructions which when executed by at least one processor, cause the at least one processor to:

• determine multiple paths from an origin of a traffic flow to a destination, each of the multiple paths including a first network domain path and a second network domain path;
• obtain first performance scores for the first network domain paths and the second network domain paths;
• combine, for each path of the determined multiple paths, a first performance score for the first network domain path and a second performance score for the second network domain path;
• designate a path with the best combined performance score as a primary path;
• route traffic along the primary path;
• and
• reroute traffic, in response the combined score of the primary path falling below a threshold, from the primary path to a backup path.

A system, comprising:

• at least one processor;
• a non-transitory computer readable medium storing instructions which when executed by the at least one processor causes the at least one processor:
• determine multiple paths from an origin of a traffic flow to a destination, each of the multiple paths including a first network domain path and a second network domain path;
• obtain first performance scores for the first network domain paths and the second network domain paths;
• combine, for each path of the determined multiple paths, a first performance score for the first network domain path and a second performance score for the second network domain path;
• designate a path with the best combined performance score as a primary path;
• route traffic along the primary path;
• and
• reroute traffic, in response the combined score of the primary path falling below a threshold, from the primary path to a backup path.