All my switch ports are dynamic auto and static access by default with DTP running (dynamic auto) IOU9#sh run int e3/3 Building configuration... Current configuration : 29 bytes ! interface Ethernet3/3 end IOU9#sh int e3/3 switchport Name: Et3/3 Switchport: Enabled Administrative Mode: dynamic auto Operational Mode: static access Administrative Trunking Encapsulation: negotiate Operational Trunking Encapsulation: native Negotiation of Trunking: On Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Administrative Native VLAN tagging: enabled Voice VLAN: none !! ADDING PORTFAST OPTION TO DEFAULT PORT CONFIG IOU9(config)# int e3/3 IOU9(config-if)#spanning-tree portfast edge %Warning: portfast should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc... to this interface when portfast is enabled, can cause temporary bridging loops. Use with CAUTION %Portfast has been configured on Ethernet3/3 but will only have effect when the interface is in a non-trunking mode. IOU9(config-if)# IOU9(config-if)# IOU9(config-if)#do sh run int e3/3 Building configuration... Current configuration : 58 bytes ! interface Ethernet3/3 spanning-tree portfast edge end !! MANULY CONFIGURED PORT TO BE ACCESS PORT IOU9#sh int e3/3 switchport Name: Et3/3 Switchport: Enabled Administrative Mode: static access Operational Mode: static access Administrative Trunking Encapsulation: negotiate Operational Trunking Encapsulation: native Negotiation of Trunking: Off !! NOW ADDING PORTFAST COMMAND IOU9(config)#int e3/3 IOU9(config-if)# spanning-tree portfast edge %Warning: portfast should only be enabled on ports connected to a single host. Connecting hubs, concentrators, switches, bridges, etc... to this interface when portfast is enabled, can cause temporary bridging loops. Use with CAUTION %Portfast has been configured on Ethernet3/3 but will only have effect when the interface is in a non-trunking mode. IOU9(config-if)# IOU9(config-if)#do sh run int e3/3 Building configuration... Current configuration : 82 bytes ! interface Ethernet3/3 switchport mode access spanning-tree portfast edge end !! MOST IMPORTANTLY PORTFAST IS THERE AND APPLIED, see "The port is in the portfast edge mode" IOU9#SH SPANning-tree INTerface E3/3 DETail Port 16 (Ethernet3/3) of VLAN0001 is designated forwarding Port path cost 100, Port priority 128, Port Identifier 128.16. Designated root has priority 32769, address aabb.cc00.0900 Designated bridge has priority 32769, address aabb.cc00.0900 Designated port id is 128.16, designated path cost 0 Timers: message age 0, forward delay 0, hold 0 Number of transitions to forwarding state: 1 The port is in the portfast edge mode Link type is point-to-point by default BPDU: sent 1391, received 2 NO MATTER WHAT I DO, MESSAGE "%Portfast has been configured on Ethernet3/3 but will only have effect when the interface is in a non-trunking mode." SHOWS UP.