Dell Force10 Z9000 FTOS Configuration Guide for Z9000 System - Page 598

www.dell.com | support.dell.com Table 27-2. MSTP Default Port Cost Values Port Cost 10-Gigabit Ethernet interfaces Port Channel with 100 Mb/s Ethernet interfaces Port Channel with 1-Gigabit Ethernet interfaces Port Channel with 10-Gigabit Ethernet interfaces Default Value 2000 180000 18000 1800 To change the port cost or priority of an interface: Task Change the port cost of an interface. Range: 0 to 200000 Default: see Table 27-2. Change the port priority of an interface. Range: 0 to 240, in increments of 16 Default: 128 Command Syntax spanning-tree msti number cost cost Command Mode INTERFACE spanning-tree msti number priority priority INTERFACE View the current values for these interface parameters using the command show config from INTERFACE mode. See Figure 27-8. 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 598 | Multiple Spanning Tree Protocol (MSTP)