Patent ID: 9166877
Filing Date: 2015-10-20
Classification: H04L

Abstract:
1. A method, comprising: transmitting a connectivity verification protocol control message from a local network device over a link to a remote network device to attempt to establish a connectivity verification protocol session with the remote network device; in response to non-receipt of a returned connectivity verification protocol control message from the remote network device, determining that there is an inability to establish a connectivity verification protocol session with the remote network device and sending a connectivity verification protocol echo message from the local network device over the link to the remote network device without establishment of a connectivity verification protocol session, the echo message sent using a forwarding protocol; in response to receipt of a reply to the connectivity verification protocol echo message from the remote network device, determining the forwarding protocol is functioning and the inability to establish the connectivity protocol session is due to a failure with the connectivity verification protocol at the remote device; and using the link to forward data traffic from the local network device to the remote network device.