Cooperative procedure, between bridges and controller, repair of failed roads and network bridge (Machine-translation by Google Translate, not legally binding)

摘要

The present invention describes mechanisms for, in a network of transparent bridges endowed with learning functionality of roads of type arp-path, in cooperation with the sdn controller, repair all the roads in use that pass through a certain link when it fails. The bridge with the link in error informs the controller sending an openflow packet of type packetln containing the destination address to be repaired. The controller queries in a table the border bridge to which each terminal is connected and sends an openflow packetout packet to the frontier bridge connected to the destination terminal. This package contains a multicast repair frame that the bridge de-encapsulates and sends through all its links, flooding the network until reaching the bridge that detected the failure of the link, establishing this frame as it passes through the network a confluence tree towards the bridge of the destination terminal. (Machine-translation by Google Translate, not legally binding)