Electronic modules in a vehicle may communicate over an Audio/Video Bridging (AVB) network. The modules normally cooperate to send and receive streams of data with a specified quality of service as AVB streams. When conditions are present in which an AVB-quality stream cannot be sent over the network, the modules can communicate with certain limp-home functionality. Sending modules may send streams of data without a stream reservation as multicast messages. Receiving modules may be configured to receive the multicast messages. Network bridge modules may be configured to enable a Talker Pruning feature to facilitate handling of the multicast messages.