| 摘要 |
A method and apparatus are disclosed for per-service flow protection and restoration of data in one or more packet networks. The disclosed protection and restoration techniques allow traffic to be prioritized and protected from the aggregate level down to a micro-flow level. Thus, protection can be limited to those services that are fault sensitive. Protected data is duplicated over a primary path and one or more backup data paths. Following a link failure, protected data can be quickly and efficiently restored without significant service interruption. A received packet is classified (420) at each end point based on information in a header portion of the packet, using one or more rules that determine whether the received packet should be protected (430). At an ingress node (400), if the packet classification determines that the received packet should be protected, then the received packet is transmitted on at least two paths (440). At an egress node (500), if the packet classification determines that the received packet is protected, then multiple versions of the received packet are expected and only one version of the received packet is transmitted (550).
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