Abstract: A DCN includes N first-level subnetworks, each first-level subnetwork includes N second-level subnetworks, each kth-level subnetwork includes N (k+1)th-level subnetworks, each (K?1)th-level subnetwork includes multiple switches, and the DCN is a K-level network; each switch in the DCN has K subnetwork identifiers, the K subnetwork identifiers are respectively used to indicate each level of subnetwork to which the switch belongs and a number in a (K?1)th-level subnetwork to which the switch belongs; and the switch is separately interconnected with each switch in K direct connection switch groups, each direct connection switch group includes N?1 switches, and an ith-level subnetwork identifier of the N?1 switches included in an ith direct connection switch group of the K direct connection switch groups is different from an ith-level subnetwork identifier of the switch, and is the same as other K?1 subnetwork identifiers of the switch.

Abstract: A DCN includes N first-level subnetworks, each first-level subnetwork includes N second-level subnetworks, each kth-level subnetwork includes N (k+1)th-level subnetworks, each (K?1)th-level subnetwork includes multiple switches, and the DCN is a K-level network; each switch in the DCN has K subnetwork identifiers, the K subnetwork identifiers are respectively used to indicate each level of subnetwork to which the switch belongs and a number in a (K?1)th-level subnetwork to which the switch belongs; and the switch is separately interconnected with each switch in K direct connection switch groups, each direct connection switch group includes N?1 switches, and an ith-level subnetwork identifier of the N?1 switches included in an ith direct connection switch group of the K direct connection switch groups is different from an ith-level subnetwork identifier of the switch, and is the same as other K?1 subnetwork identifiers of the switch.