The disclosure relates to reconfigurable avionics equipment, subscribed to an onboard network such as an AFDX® network. The equipment has an architecture in two portions, a functional portion which makes it possible to perform the function proper to the piece of equipment and an interfacing portion, which allows the functional portion to communicate over the network. The interfacing portion includes a configuration file separate from the one used to configure the functional portion and able to be downloaded, using the network, independently of the latter.