Procedures for network device flow-look-up management

Technologies to manage network flow look-ups of a network device comprises a network controller and a target device, which are each communicatively coupled to the network device. The network device includes a cache for a processor of the network device and a main memory. The network device additionally comprises for this purpose a hash table with a plurality of planes having a first-level hash table that is stored in the cache of the network device, and a second-level hash table that is stored in the main memory of the network device. The network device is configured to determine whether a network flow hash corresponding to a network flow that indicates the target device based on the first-level or second-level hash table on a priority of the network flow that for the network device by network control is provided, to be saved.