Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 625

Configure an EdgePort The EdgePort feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner. In this mode an interface forwards frames by default until it receives a BPDU that indicates that it should behave otherwise; it does not go through the Learning and Listening states. The bpduguard shutdown-on-violation option causes the interface hardware to be shutdown when it receives a BPDU. When only bpduguard is implemented, although the interface is placed in an Error Disabled state when receiving the BPDU, the physical interface remains up and spanning-tree will drop packets in the hardware after a BPDU violation. BPDUs are dropped in the software after receiving the BPDU violation. This feature is the same as PortFast mode in Spanning Tree. Caution: Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if it is enabled on an interface connected to a network. To enable EdgePort on an interface, use the following command: Task Enable EdgePort on an interface. Command Syntax spanning-tree mstp edge-port [bpduguard | shutdown-on-violation] Command Mode INTERFACE Verify that EdgePort is enabled on a port using the command show config from the INTERFACE mode, as shown in the following example. FTOS Behavior: Regarding bpduguard shutdown-on-violation behavior: 1 If the interface to be shutdown is a port channel then all the member ports are disabled in the hardware. 2 When a physical port is added to a port channel already in error disable state, the new member port will also be disabled in the hardware. 3 When a physical port is removed from a port channel in error disable state, the error disabled state is cleared on this physical port (the physical port will be enabled in the hardware). 4 The reset linecard command does not clear the error disabled state of the port or the hardware disabled state. The interface continues to be disables in the hardware. The error disabled state can be cleared with any of the following methods: • Perform an shutdown command on the interface. • Disable the shutdown-on-violation command on the interface ( no spanning-tree stp-id portfast [bpduguard | [shutdown-on-violation]] ). • Disable spanning tree on the interface (no spanning-tree in INTERFACE mode). • Disabling global spanning tree (no spanning-tree in CONFIGURATION mode). FTOS(conf-if-gi-3/41)#spanning-tree mstp edge-port FTOS(conf-if-gi-3/41)#show config ! interface GigabitEthernet 3/41 no ip address switchport spanning-tree mstp edge-port spanning-tree MSTI 1 priority 144 no shutdown FTOS(conf-if-gi-3/41)# Multiple Spanning Tree Protocol | 625