The ospfv3 flush-source-trace port command configures a UDP port number for OSPFv3 flush LSA source tracing packets.
The undo ospfv3 flush-source-trace port command restores the default UDP port number for OSPFv3 flush LSA source tracing packets.
By default, the UDP port number of global OSPFv3 flush LSA source tracing packets is 50122.