3Com 5500G-EI Command Reference Guide - Page 323

RSTP Configuration Commands 327 [SW5500]stp bpdu-protection stp cost Syntax stp cost cost undo stp cost View Ethernet Port View Parameter cost: Specifies the path cost, ranging from 1 to 2000000. Description Use the stp cost command to configure the path cost on a spanning tree for the current Ethernet port. Use the undo stp cost command to restore the default cost. By default, the bridge gets the path cost directly through the speed of the link connected to the port. The path cost of an Ethernet port is related to the link speed. You can refer to the following table. RSTP will check the link speed of the port and get the path cost directly. It is recommended to set the cost to the default value and let RSTP query the path cost of the port. Table 51 Path cost for ports at different link speeds Link Speed 10Mbps 100Mbps 1Gbps 10Gbps Recommended Value 2000 200 20 2 Recommended Range 200 to 20000 20 to 2000 2 to 200 2to 20 Switch Range 1 to 2000000 1 to 2000000 1 to 2000000 1 to 2000000 Example To configure the path cost of GigabitEthernet1/0/1 to 200, enter the following: system-view System View: return to User View with Ctrl+Z. [SW5500]interface GigabitEthernet1/0/1 [SW5500-GigabitEthernet1/0/1]stp cost 200 stp edged-port Syntax stp edged-port { enable | disable } undo stp edged-port View Ethernet Port View