Performance in a Failure Situation of an OpMiGua Packet Switch with Internal Blocking

Differentiated survivability is a crucial quality of service (QoS) issue in future optical networks. Traffic streams belonging to applications demanding high availability should not be disrupted by the recovery process initiated after a node-failure. A recent study suggested to protect high-priority traffic by exploiting the inherent redundancy in the all-optical OpMiGua node. This article compares performance of high and low priority traffic before and after partial node-failure. Simulations are performed for an internally blocking and an internally nonblocking node. The results provide insight to the underlying effects causing packet loss in an internally blocking OpMiGua node and gives directions to future work