20-321) Perform this configuration in system view system-view[Sysname] stp interface Ethernet 1/0/1 instance 1 cost 20002) Perform this configuration in Ethernet port view system-view[Sysname] interface Ethernet 1/0/1[Sysname-Ethernet1/0/1] stp instance 1 cost 2000Configuration example (B)# Configure the path cost of Ethernet 1/0/1 in MSTI 1 to be calculated by the MSTP-enabled switchaccording to the IEEE 802.1D-1998 standard.1) Perform this configuration in system view system-view[Sysname] undo stp interface Ethernet 1/0/1 instance 1 cost[Sysname] stp pathcost-standard dot1d-19982) Perform this configuration in Ethernet port view system-view[Sysname] interface Ethernet 1/0/1[Sysname-Ethernet1/0/1] undo stp instance 1 cost[Sysname-Ethernet1/0/1] quit[Sysname] stp pathcost-standard dot1d-1998Configuring Port PriorityPort priority is an important criterion on determining the root port. In the same condition, the port with thesmallest port priority value becomes the root port.A port on an MSTP-enabled switch can have different port priorities and play different roles in differentMSTIs. This enables packets of different VLANs to be forwarded along different physical paths, so thatVLAN-based load balancing can be implemented.You can configure port priority in one of the following two ways.Configure port priority in system viewFollow these steps to configure port priority in system view:To do... Use the command... RemarksEnter system view system-view —Configure port priority forspecified portsstp interface interface-listinstance instance-id portpriority priorityRequiredThe default port priority is 128.Configure port priority in Ethernet port viewFollow these steps to configure port priority in Ethernet port view:To do... Use the command... RemarksEnter system view system-view —
