This object sets the MRP Join timer for this port, controlling how long the switch waits before retransmitting a Join message when registering a new VLAN or attribute via the Multiple Registration Protocol, measured in hundredths of a second. An admin tunes this to control how quickly MRP registrations propagate versus how much protocol chatter they generate, generally leaving it at the recommended default unless troubleshooting slow convergence. For example, the default value of 20 centiseconds, 0.2 seconds, sets a fast, standard Join retransmission interval for this port's MRP state machine.