Patent ID: 8289856
Filing Date: 2012-10-16
Classification: H04L

Abstract:
1. A method for generating multiple BGP session flapping alarms for routers deployed in an Autonomous System (AS) network comprising: receiving a BGP session “down” alarm at a first router from a second router in the AS network; starting a session “up” count for the BGP session between the first and second routers and starting a flap time period P; if a BGP session “up” alarm is received by the first router from the second router within the flap time period P, starting a flapping count for the first router with one flap registered and starting a predetermined flapping time period Q; counting every flap the first router experiences with each router that the first router has a link with in the AS network; and comparing the flap count to a predetermined alarm threshold N, wherein N is a number of flaps, and if the first router experiences N number of flaps from all first router BGP sessions within the flapping time period Q, generating a multiple session flapping alarm for the first router.