Patent ID: 9197533
Filing Date: 2015-11-24
Classification: G01V,H04L

Abstract:
1. A method for dynamically maintaining and enforcing relative policies for a prefix in a computer network, the method comprising: monitoring, by a node of the computer network, a performance characteristic for a prefix over a current path, the prefix associated with a policy; maintaining a long-term average (LTA) value of the performance characteristic; maintaining a short-term average (STA) value of the performance characteristic; comparing the LTA value to the STA value to determine if the STA value indicates a worse value than the LTA value by at least a configurable amount; in the event the STA value indicates a worse value than the LTA value by at least the configurable amount, considering, by the node, the prefix to be out-of-policy (OOP) for the policy, wherein a prefix is a portion common to a plurality of addresses that is used by a routing protocol to render routing decisions; in the event the prefix is considered to be OOP, determining whether a more optimal path exists than the current path; and selecting the more optimal path as a new current path.