ABSTRACT
As defined in [RFC3272], network survivability or network reliability refers to the capability of a network to maintain service continuity in the presence of faults, which can be accomplished by promptly recovering from network impairments and maintaining the required quality of service (QoS) for existing services after recovery. Reliability has become a major concern, particularly in metro environments, due to the recent increasing demands to carry mission-critical traffic or other high-priority traffic over IP-based metropolitan area networks (MANs).
