Service plane triggered fast reroute protection

A network device comprising:

• a forwarding plane comprising:
• a packet forwarding component;
• a fault detection network protocol executing within the forwarding plane;
• and
• a service plane comprising one or more service cards, wherein the service plane comprises:
• a software process that applies a service to network traffic received at the network device via a primary service engineered path, wherein the network device operates as an egress device of the primary service engineered path, and
• a monitor component that communicates with the software process to assess a performance level of the software process in applying the service to the network traffic, wherein the performance level of the service is independent of an overall operational state of the network device;
• wherein the monitor component detects that the performance level of the service differs from an expected performance level of the service by at least a threshold amount,
• wherein the monitor component outputs a notification to the fault detection network protocol in response to determining that the detected performance level differs from the expected performance level by at least the threshold amount, and
• wherein, in response to receiving the notification from the monitor component, the fault detection network protocol outputs a control message to a router on the primary service engineered path, wherein the control message notifies the router to reroute network traffic to a second instance of the service provided at a second network device reachable by a backup service engineered path.

A system comprising:

• a service node;
• and
• a router along a primary service engineered path between the service node and the router;
• wherein the service node comprises:
• a forwarding plane comprising:
• a packet forwarding component;
• a fault detection network protocol executing within the forwarding plane;
• and
• a service plane comprising one or more service cards, wherein the service plane comprises:
• a software process that applies a service to network traffic received at the router via the primary service engineered path, wherein the router operates as an egress device of the primary service engineered path, and
• a monitor component that communicates with the software process to assess a performance level of the software process in applying the service to the network traffic, wherein the performance level of the service is independent of an overall operational state of the router;
• wherein the monitor component detects that the performance level of the service differs from an expected performance level of the service by at least a threshold amount,
• wherein the monitor component outputs a notification to the fault detection network protocol in response to determining that the detected performance level differs from the expected performance level by at least the threshold amount, and
• wherein, in response to receiving the notification from the monitor component, the fault detection network protocol outputs a control message to the router on the primary service engineered path, wherein the control message notifies the router to reroute network traffic to a second instance of the service provided at a second network device reachable by a backup service engineered path;
• wherein the router receives the control message, and, in response to receiving the control message, reroutes traffic requiring application of the service to the second instance of the service provided at the second network device reachable by the backup service engineered path.

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

• apply a service to network traffic received at a service plane of a service node via a primary service engineered path, wherein the service node operates as an egress device of the primary service engineered path;
• detect, at the service plane of the service node, that a performance level of the service differs from an expected performance level of the service by at least a threshold amount, wherein the performance level of the service is independent of an overall operational state of the service node;
• output a notification to a fault detection network protocol in a forwarding plane of the service node in response to determining that the detected performance level of the service differs from the expected performance level by at least the threshold amount;
• and
• in response to receiving notification from the service plane, output, by the fault detection network protocol, a control message to a router on the primary service engineered path, wherein the control message notifies the router to reroute network traffic to a second instance of the service provided at a second service node reachable by a backup service engineered path.