Architecture based on topology configuration of BMC change system and cascade configuration method

The invention provides architecture based on the topology configuration of a BMC change system and a cascade configuration method. The signal output end of a BMC management module is connected with the signal input end of a bus port module, the bus port module is connected with the signal input end of a first input-output module, the signal output end of the first input-output module is connectedwith the signal input end of a first switching module, a second input-output module is connected with the first signal input end of a second switching module, and a third input-output module is connected with the second signal input end of the second switching module. Different configurations can be switched through the BMC management module, and application to different scenes of servers is achieved. The situation that in an existing scheme, STARP pins are in signal connection to 3-pin jumper caps, and in practical use, topological structures can be changed only in the manner that a user needs to reach the scene to open a case and manually adjusts the positions of the jumper caps is avoided. Chip port state configurations can be changed, and operation of the user is facilitated.