Application-specific connectivity loss detection for multicast virtual private networks

A network device comprising:

• an interface for receiving a connectivity detection protocol message via a point-to-point (P2P) tunnel from an ingress network device of the P2P tunnel, wherein the connectivity detection protocol message specifies a label associated with one of a plurality of services provided to the egress network device via the P2P tunnel, wherein the P2P tunnel serves as a transport tunnel for the plurality of services;
• a hardware-based processor for executing a fault detection module to detect based on a fault detection network protocol session over the P2P tunnel between the ingress network device to the egress network device that a state of the P2P tunnel is down,
• wherein, in response to the detecting, the fault detection module determines that the one of the plurality of services is unavailable from the ingress network device via the P2P tunnel based on the label associated with the one of the plurality of services, and
• a routing component that selects a new source to provide the one of the plurality of services.

A non-transitory computer-readable storage medium comprising instructions for causing a programmable processor to:

• by an egress network device of a point-to-point (P2P) tunnel, receive a connectivity detection protocol message via the P2P tunnel from an ingress network device of the P2P tunnel, wherein the connectivity detection protocol message specifies a label associated with one of a plurality of services provided to the egress network device via the P2P tunnel, wherein the P2P tunnel serves as a transport tunnel for the plurality of services;
• detect based on a fault detection network protocol session over the P2P tunnel between the ingress network device to the egress network device that a state of the P2P tunnel is down;
• and
• in response to the detecting, determine that the one of the plurality of services is unavailable from the ingress network device via the P2P tunnel based on the label associated with the one of the plurality of services, and selecting a new source to provide the one of the plurality of services.