Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 471

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 27-2. Change the port priority of an interface. Range: 0 to 240 Default: 128 Command Syntax spanning-tree rstp cost cost spanning-tree rstp priority priority-value Command Mode INTERFACE INTERFACE To view the current values for interface parameters, use the show spanning-tree rstp command from EXEC privilege mode (Figure 27-5). 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 you implement only bpduguard, although the interface is placed in an Error Disabled state when receiving the BPDU, the physical interface remains up and spanning-tree drops 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 you enable it on an interface connected to a network. Enabling BPDU Filtering on an interface, stops sending and receiving of BPDUs on the port fast enabled ports. When BPDU guard and BPDU filter is enabled on the port, BPDU filter takes the highest precedence. By default bpdu filtering on an interface is disabled. To enable EdgePort on an interface, use the following command: Task Enable EdgePort on an interface. Command Syntax spanning-tree rstp edge-port [bpduguard [shutdown-on-violation] | bpdufilter] Command Mode INTERFACE To verify that EdgePort is enabled on a port, use the show spanning-tree rstp command from EXEC privilege mode or the show config command from INTERFACE mode. Dell Force10 recommends using the show config command (Figure 27-8). Rapid Spanning Tree Protocol (RSTP) | 469