User Manual UMN:CLIV58082998.3.4 STP ModeFirst of all, you need to enable STP function. You cannot configure any parametersrelated to Spanning Tree Protocol without this command.To enable STP function on the V5808, use the following command.Command Mode Descriptionspanning-tree Bridge Enables STP function.To disable STP function from the system, use the following command.Command Mode Descriptionno spanning-tree Bridge Disables STP function.To select the spanning tree mode, use the following command.Command Mode Descriptionspanning-tree mode { mst |rapid-pvst | stp | rstp} BridgeConfigures a spanning-tree mode:mst: Multiple Spanning Tree Protocol (default)rapid-pvst: Per-vlan Rapid STPTo delete the configured spanning tree mode, use the following command.Command Mode Descriptionno spanning-tree mode Bridge Deleted a configured spanning tree mode. (default:MSTP)8.3.5 STP Basic ConfigurationTo configure STP, use the following steps.Step 1Enable STP function using the spanning-tree command.Step 2Configure detail options if specific commands are required.8.3.5.1 Path-cost MethodAfter deciding a root switch, you need to decide to which route you will forward the packet.To do this, the standard is a path-cost.Generally, a path cost depends on the transmission speed of LAN interface in the switch.The following table shows the path cost according to the transmit rate of LAN interface.You can use same commands to configure STP and RSTP, but their path-costs are to-tally different. Please be careful not to make mistake.
