A method is performed by a control device, and the method includes: obtaining a first request and a second request, where the first request includes a bandwidth required by a first service, the second request includes a bandwidth required by a second service; determining the bandwidth required by the first service, and the bandwidth required by the second service, that a bandwidth occupation conflict exists between the first request and the second request; obtaining a plurality of comprehensive allocation modes for the first service and the second service based on the bandwidth provided by the port, the bandwidth required by the first service, and the bandwidth required by the second service; and determining a preferred comprehensive allocation mode from the plurality of comprehensive allocation modes based on a bandwidth allocation policy group including a plurality of bandwidth allocation policies.