Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 790

www.dell.com | support.dell.com Note: The FTOS implementation of PVST+ uses IEEE 802.1s costs as the default costs. Other implementations use IEEE 802.1d costs as the default costs if you are using Dell Force10 systems in a multi-vendor network, verify that the costs are values you intended. To change the port cost or priority of an interface: Task Change the port cost of an interface. Range: 0 to 200000 Default: Refer to Table 43-2, "PVST+ Default Port Cost Values," in Per-VLAN Spanning Tree Plus. Change the port priority of an interface. Range: 0 to 240, in increments of 16 Default: 128 Command Syntax spanning-tree pvst vlan cost Command Mode INTERFACE spanning-tree pvst vlan priority INTERFACE The values for interface PVST+ parameters are given in the output of the command show spanning-tree pvst, as shown in the example in Influence PVST+ Root Selection. 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 Command Syntax Enable EdgePort on an interface. spanning-tree pvst edge-port [bpduguard | shutdown-on-violation] Command Mode INTERFACE 790 | Per-VLAN Spanning Tree Plus