Managing QSFP Ports 1418Managing QSFP PortsQSFP ports can operate in 1 x 40G mode or in 4 x 10G mode. Appropriatecables must be used that match the selected mode. When changing from onemode to another, a switch reboot is required. The QSFP ports also supportstacking over the interfaces in either 1 x 40G or 4 x 10G mode. Changingfrom Ethernet mode to stacking mode and vice-versa requires a reboot aswell.The ports on a QSFP plugin module are named Fo1/1/1-2 in 40-gigabit modeand Te1/1/1-8 in 10-gigabit mode. On the PC8164, the fixed QSFP ports arenamed Fo1/0/1-2 in 40-gigabit mode and Te1/0/49-56 in 10-gigabit mode. Allof the possible populated or configured interfaces will show in the showinterfaces status command regardless of the port mode, i.e. 40-gigabit or10-gigabit. Unpopulated or unconfigured interfaces for plug in modules donot show in the show interfaces status command.The default setting for a 40-gigabit Ethernet interface is nonstacking,40-gigabit Ethernet (1 x 40G).The commands to change 1 x 40G and 4 x 10G modes are always entered onthe 40-gigabit interfaces.The commands to change the Ethernet/stack mode are entered on theappropriate interface (tengigabitethernet or fortygigabitethernet). It ispossible to configure some of the 10G ports in a 40G interface as stacking andnot others.To reconfigure a QSFP port, select the 40-gigabit port to change in InterfaceConfig mode and enter the hardware profile portmode commandwith the selected mode. For example, to change a 1 x 40G port to 4 x 10Gmode, enter the following commands on the forty-gigabit interface:console(config)#interface fo1/1/1console(config-if-Fo1/1/2)#hardware profile portmode 4x10gThis command will not take effect until the switch is rebooted.console(config-if-Fo1/1/2)#do reloadAre you sure you want to reload the stack? (y/n)
