Cross-layer network fault recovery system and method based on configuration migration

A cross-layer network fault recovery method based on configuration migration, applicable to a double layer switching network comprising an upper layer switching network and an underlying layer switching network, the method comprises:

• when a service fault occurs in the upper layer switching network, an upper layer switching network controller receives and processes fault information sent by an upper layer switching network device or generating fault information by identifying a fault in an upper layer switching network device, and sends the fault information to a super controller;
• the super controller searches, according to the fault information and a first forwarding table, for a fault device in the upper layer switching network for fault device location;
• the super controller selects a backup upper layer switching network device in the upper layer switching network at least according to topology information, a result of the fault device location and attributes of the upper layer switching network devices;
• the super controller generates a third forwarding table at least according to first forwarding table entries for all neighbor devices of the fault device, and delivers the third forwarding table to the upper layer switching network controller and an underlying layer switching network controller;
• wherein, the neighbor devices of the fault device are devices directly connected with the fault device in the original upper layer switching network;
• the upper layer switching network controller generates first forwarding table entries to be updated for neighbor devices of the fault device and a backup upper layer switching network device according to the third forwarding table, and delivers the updated first forwarding table entries to neighbor devices of the fault device and the backup upper layer switching network device;
• and
• the underlying layer switching network controller calculates underlying layer switching network transmission channels for implementing connections between neighbor devices of the fault device and the backup upper layer switching network device reflected in the third forwarding table, and updates a second forwarding table of underlying layer switching network devices on the transmission channels;
• wherein, the first forwarding table describes switching behaviors of an upper layer service by upper layer switching network devices, comprising information of device ports through which the upper layer service passes;
• the second forwarding table describes switching behaviors of an underlying layer service by underlying layer switching network devices, comprising information of device ports through which the underlying layer service passes;
• and the third forwarding table describes connections and service switching behaviors by neighbor devices of the fault device and the backup upper layer switching network device with the underlying layer switching network device, and switching behaviors of upper layer services by the backup upper layer switching network device.