Patent ID: 8065438
Filing Date: 2011-11-22
Classification: H04L

Abstract:
1. A system, comprising: an intelligence component configured to automatically construct and update a list of two or more screening values, each of the two or more screening values corresponding to a flagged autonomous system (AS) number that is determined as causing a failure in a loop detection check, the intelligence component being further configured to automatically detect a decrease in probability of at least one of the two or more screening values causing the failure in the loop detection check and configured to remove at least one of the two or more screening values from the list based on automatic detection of the decreased probability, the decreased probability being characterized by less than a change from full failure to full success and based on employment of at least one of AS-in, AS-override, or redistribution of Border Gateway Protocol (BGP) to Interior Gateway Protocol (IGP) or a combination thereof; a screening component configured to receive a message including an AS path that comprises at least one AS number, the screening component being further configured to compare the AS path with the list of the two or more screening values to detect from the AS path an AS number that matches the flagged AS number; and a substitution component configured to modify the AS path by automatically replacing the AS number with a local AS number in response to detecting a match between the AS number and the flagged AS number, the local AS number not causing a failure in the loop detection check of the AS path.