A transport and assembly device for assembling a shaft seal, particularly one with a seal lip directed radially toward the inside, into a camshaft arrangement for an internal combustion engine is designed to simplify the assembly of the shaft seal. When the panel is to be opened, the panel separates from the mainframe after the opening apparatus touches the switch. Each of the L-shaped grooves includes communicable wide and narrow groove portions. In addition, a state of oversteering and a state of understeering are determined by the data processing device. Finally, when a topology change is detected in one of the multiple STP instances, entries that have been learned on the unique set of ports assigned to the STP protocol instance where the topology change is detected are fast-aged or transitioned from one state to another.