Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 850

www.dell.com | support.dell.com Modify Interface Parameters On interfaces in Layer 2 mode, you can set the port cost and port priority values. • Port cost is a value that is based on the interface type. The default values are listed in Table 47-2, "RSTP Default Values," in Rapid Spanning Tree Protocol. The greater the port cost, the less likely the port will be selected to be a forwarding port. • Port priority influences the likelihood that a port will be selected to be a forwarding port in case that several ports have the same port cost. To change the port cost or priority of an interface, use the following commands: Task Change the port cost of an interface. Range: 0 to 65535 Default: Refer to Table 47-2, "RSTP Default Values," in Rapid Spanning Tree Protocol. Change the port priority of an interface. Range: 0 to 15 Default: 128 Command Syntax spanning-tree rstp cost cost spanning-tree rstp priority priority-value Command Mode INTERFACE INTERFACE View the current values for interface parameters using the show spanning-tree rstp command from EXEC privilege mode. Refer to Command example: show spanning-tree rstp. 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 Command Mode spanning-tree rstp edge-port [bpduguard | shutdown-on-violation] INTERFACE 850 | Rapid Spanning Tree Protocol