Client network configuration

A first antenna unit provided on a vehicle, the vehicle comprising a plurality of antenna units, each antenna unit comprising a first communications interface having a hardware address, each first communication interface being connected to a communication network, the first antenna unit comprising a first communications interface having a hardware address, the first communication interface being connectable to a communication network, the first antenna unit being configured to:

• communicate over the communication network using a first interface address associated with the first communication interface to identify at least one other antenna unit using a self-discovery protocol, the self-discovery protocol being a neighbour discovery protocol, the first interface address being generated by the first antenna unit;
• communicate with the at least one other antenna unit to designate a master antenna unit based on a priority order of the antenna units;
• in response to the first antenna unit being designated the master antenna unit, generate a first address allocation server to allocate respective second interface addresses to the at least one other antenna unit to be used in communication between the plurality of antenna units;
• and
• generate a second address allocation server to allocate respective third interface addresses from a subset of a set of third interface addresses to at least one client device connected to the client network, different subsets of the set of third interface addresses being allocated to second address allocation servers of respective antenna units.