1-28 system-viewSystem View: return to User View with Ctrl+Z.[Sysname]stp interface Ethernet1/0/1 no-agreement-checkstp pathcost-standardSyntaxstp pathcost-standard { dot1d-1998 | dot1t }undo stp pathcost-standardViewSystem viewParametersdot1d-1998: The device calculates the default path cost for ports based on IEEE 802.1d-1998.dot1t: The device calculates the default path cost for ports based on IEEE 802.1t.DescriptionUse the stp pathcost-standard command to set the standard to be used to calculate the default pathcosts of the links connected to the switch.Use the undo stp pathcost-standard command to specify to use the default standard.By default, the device calculates the default path cost for ports based on IEEE 802.1t. STP uses pathcosts to indicate the quality of links. A smaller path cost indicates a higher link quality. The path cost of aport is related to the rate of the link connecting the port. The higher the link rate, the smaller the pathcost. The path cost of a port may vary when different standards are used to calculate it. For details, seeTable 1-8.Table 1-8 Link speeds and the corresponding path costsLink speed Operating mode (half-/full-duplex) 802.1D-1998 IEEE 802.1t0 — 65,535 200,000,00010 MbpsHalf-duplex/Full-duplexAggregated link 2 portsAggregated link 3 portsAggregated link 4 ports100959595200,0001,000,000666,666500,000100 MbpsHalf-duplex/Full-duplexAggregated link 2 portsAggregated link 3 portsAggregated link 4 ports19151515200,000100,00066,66650,0001,000 MbpsFull-duplexAggregated link 2 portsAggregated link 3 portsAggregated link 4 ports4333200,00010,0006,6665,000
