Operation Manual – MSTPH3C S7500 Series Ethernet Switches Chapter 1 MSTP Configuration1-30In this case, you can force the port to transit to the MSTP mode by performing themCheck operation on the port.Similarly, a port on an RSTP-enabled switch operating as an upstream switch transitsto the STP-compatible mode when it has an STP-enabled switch connected to it. Whenthe STP-enabled downstream switch is then replaced by an MSTP-enabled switch, theport cannot automatically transit to the MSTP operation mode. It remains in theSTP-compatible mode. In this case, you can force the port to transit to the MSTP modeby performing the mCheck operation on the port.1.4.1 Configuration PrerequisitesMSTP runs normally on the switch.1.4.2 Configuration ProcedureYou can perform the mCheck operation in the following two ways.I. Performing the mCheck operation in system viewFollow these steps to perform the mCheck operation in system view:To do ... Use the command ... RemarksEnter system view system-view —Perform themCheck operation stp [ interface interface-list ] mcheck RequiredII. Performing the mCheck operation in Ethernet port viewFollow these steps to perform the mCheck operation in Ethernet port view:To do ... Use the command ... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Perform the mCheck operation stp mcheck Required1.4.3 Configuration Example# Perform the mCheck operation on Ethernet2/0/1.1) Configure in system view. system-view[H3C] stp interface ethernet2/0/1 mcheck2) Configure in Ethernet port view.