Bandwidth allocation in asymmetrical switch topologies

A system, comprising:

• an upstream switch connected to a first root complex through a first upstream port that has a bandwidth B, wherein:
• the upstream switch is virtualized into n virtual switches, wherein each of the n virtual switches receives B/n bandwidth from the first upstream port;
• for a first virtual switch of the n virtual switches, the first virtual switch is connected to a first plurality of downstream devices through a first plurality of downstream ports in the upstream switch;
• for each remaining virtual switch of the n virtual switches, the virtual switch is connected to a respective second upstream port of a respective downstream switch, wherein the respective second upstream port of the respective downstream switch is connected to the upstream switch through a respective downstream port in the upstream switch and wherein the respective downstream switch is not connected to a second root complex different from the first root complex;
• and
• for each respective downstream switch, the downstream switch is connected to a respective second plurality of downstream devices through a respective second plurality of downstream ports in the respective second switch.