Algorithm 1 Dynamic Power Management

Inputs:

switches[]: an array of all switches in the network               spine_switch_type: an integer index that differentiates the spine switch role from the leaf and AGF types               switch_interface_states: a dictionary mapping each switch with the current interface state (activated/deactivated)               spine_start, spine_end: integer indices defining the range of spine switches   Procedure: 1   for sw in switches: 2             if readRegister(sw, “switch_type”) == spine_switch_type: 3                  continue 4             required_spine_switches = readRegister(sw, “spine_switches”) 5             if required_spine_switches == spine_end: 6                   for i in range(spine_start, spine_end): 7                         update_switch_interfaces(switches[i], On, switch_interface_states) 8             else 9                   for i in range(spine_start, spine_end): 10                       neededCount = spine_start + required_spine_switches 11                       if i >= neededCount:

12                               update_switch_interfaces(switches[i], Off, switch_interface_states) 13                       else

14                               update_switch_interfaces(switches[i], On, switch_interface_states)