Dell Converged Enhanced Ethernet Administrator’s Guide 6153-1002116-01Configuring STP, RSTP, or MSTP on CEE interface ports 64. Enter the spanning-tree command to specify the restrictions for an MSTP instance on a CEEinterface.switch(conf-if-te-0/1)#spanning-tree instance 5 cost 3550 restricted-tcnSpecifying a link typeFrom the CEE interface, use this command to specify a link type. Specifying the point-to-pointkeyword enables rapid spanning tree transitions to the forwarding state. Specifying the sharedkeyword disables spanning tree rapid transitions. The default setting is point-to-point.To specify a link type on a CEE interface, perform the following steps from Privileged EXEC mode.1. Enter the configure terminal command to access global configuration mode.2. Enter the interface command to specify the CEE interface type and slot/port number.switch(config)#interface intengigabitethernet 0/13. Enter the no shutdown command to enable the CEE interface.4. Enter the spanning-tree command to specify the link type on the CEE interface.switch(conf-if-te-0/1)#spanning-tree link-type sharedEnabling port fast (STP)From the CEE interface, use this command to enable port fast on an interface to allow the interfaceto quickly transition to the forwarding state. Port fast immediately puts the interface into theforwarding state without having to wait for the standard forward time.NOTEIf you enable the portfast bpdu-guard option on an interface and the interface receives a BPDU, thesoftware disables the interface and puts the interface in the ERR_DISABLE state.Use the spanning-tree edgeport command for MSTP and RSTP (see “Enabling a port (interface) asan edge port” on page 59).To enable port fast on the CEE interface for STP, perform the following steps from Privileged EXECmode.1. Enter the configure terminal command to access global configuration mode.2. Enter the interface command to specify the CEE interface type and slot/port number.switch(config)#interface intengigabitethernet 0/13. Enter the no shutdown command to enable the CEE interface.4. Enter the spanning-tree command to enable port fast on the CEE interface.switch(conf-if-te-0/1)#spanning-tree portfastSpecifying the port priorityFrom the CEE interface, use this command to specify the port priority. The range is 0 through 240in increments of 16. The default is 128.
