Each PPPoE/L2TP session has an operational state of traffic steering that prevents a traffic black hole caused by problems such as an incorrectly configured network or a temporary VAS outage.
The steering states are:
Non-steered
a steering profile is not applied to the session and traffic steering is not performed
Steered
a steering profile is applied to the session and traffic steering is performed
Steering-failure a steering profile is applied to the session but traffic steering is not performed, possibly because of a misconfiguration of the steering profile, L2TP, or IP routing
As the conditions to perform traffic steering are met or lost, the steering state transitions in and out of steering failure.