Patent ID: 9025440
Filing Date: 2015-05-05
Classification: H04L

Abstract:
1. A method comprising: establishing, by a device, a first Point-to-Point Protocol (PPP) session on a first interface, the first PPP session including a first link control protocol (LCP) session and a network control protocol (NCP) session; receiving, by the device, an indication of a layer one failure on the first interface, a layer three protocol, associated with the first PPP session, not being marked as down during a period of time following the layer one failure; attempting, by the device and during the period of time following the layer one failure, to establish, based on the indication of the layer one failure on the first interface, a second PPP session on a second interface that differs from the first interface, switching, by the device, to the second PPP session when the second PPP session is established on the second interface during the period of the time; and marking, by the device and after expiration of the period of the time, the layer three protocol as down when the second PPP session is not established on the second interface during the period of the time.