In order to get network or system information and make the optimal choice, the Simple Network Management Protocol (SNMP) [25] is used: network and system metric values are sent deploying SNMP local agents on each monitoring entity of the system. For instance on each onboard router, information such as ifSpeed for the available bandwidth are retrieved from the Management Information Bases (MIBs) by SNMP agents (ANG or AATN for instance) and sent to a Network Management System (NMS) located on the SMP (see figure 1 for details about SNMP agent deployment and location in the communication architecture).