I just tried to send 0x123 [8] 11 22 33 44 55 66 77 88 messages from host->CAN_1_2 and I can received them on Xavier A with below command.
nvidia@tegra-ubuntu:/usr/local/driveworks/bin$ ./sample_canbus_logger --driver=can.aurix --params=ip=10.42.0.146,bus=a,config-file=…/data/samples/sensors/can/EasyCanConfigFile.conf
You can have a try. Thanks!