Application-specific connectivity loss detection for multicast virtual private networks

摘要

An egress network device of a point-to-point (P2P) tunnel can receive an LSP Ping message via the P2P tunnel from an ingress network device of the P2P LSP, wherein the LSP Ping message specifies a label that the egress network device associates with a service provided to the egress network device via the P2P tunnel. In response to receiving the LSP Ping message, the egress network device can store an association between the label and the P2P tunnel. The egress network device also uses a fault detection network protocol session over the P2P tunnel to monitor a state of the P2P tunnel. In response to detecting based on the fault detection network protocol session that the state of the P2P tunnel is down, the egress network device determines the service is unavailable from the ingress network device via the P2P tunnel, and selects a new source to provide the service.

主权项

1. A method comprising:
by an ingress network device of a point-to-point (P2P) tunnel, receiving a first request from an egress network device of the P2P tunnel for a first service to be provided by the ingress network device to the egress network device via the P2P tunnel; by the ingress network device, receiving a second request from the egress network device for a second service to be provided by the ingress network device to the egress network device via the P2P tunnel, wherein the P2P tunnel serves as a transport tunnel for the first service and the second service; and in response to receiving the first request and the second request, and by the ingress network device, sending to the egress network device a single connectivity detection protocol message that advertises the first service and the second service as services the ingress network device associates with the P2P tunnel.