Dell Converged Enhanced Ethernet Administrator’s Guide 5953-1002116-01Configuring STP, RSTP, or MSTP on CEE interface ports 6To configure the path cost for spanning tree calculations on the CEE interface, perform thefollowing 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 configure the path cost for spanning tree calculations onthe CEE interface.switch(conf-if-te-0/1)#spanning-tree cost costEnabling a port (interface) as an edge portFrom the CEE interface, use this command to enable the port as an edge port to allow the port toquickly transition to the forwarding state. To configure a port as an edge port, follow theseguidelines:• A port can become an edge port if no BPDU is received.• When an edge port receives a BPDU, it becomes a normal spanning tree port and is no longeran edge port.• Because ports that are directly connected to end stations cannot create bridging loops in thenetwork, edge ports transition directly to the forwarding state and skip the listening andlearning states.• This command is only for RSTP and MSTP. Use the spanning-tree portfast command for STP(see “Enabling port fast (STP)” on page 61).To enable the CEE interface as an edge port, 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.4.5. Enter the spanning-tree command to enable the CEE interface as an edge port.switch(conf-if-te-0/1)#spanning-tree edgeport6. Enter the spanning tree command again to assign a BPDU filter or BPDU guard.switch(conf-if-te-0/1)#spanning-tree edgeport bpdu-filterEnabling the guard rootFrom the CEE interface, use this command to enable the guard root on the switch. The guard rootfeature provides a way to enforce the root bridge placement in the network. With the guard rootenabled on an interface, the switch is able to restrict which interface is allowed to be the spanningtree root port or the path to the root for the switch. The root port provides the best path from theswitch to the root switch. By default, guard root is disabled.
