Network congestion management using flow rebalancing

A method comprising:

• by a controller including a non-transitory memory:
• detecting congestion in a first path between a source and destination device through a plurality of switches devices;
• forwarding an indication of the congestion;
• receiving an instruction to generate a control message including flow identification information based at least in part on the indication of congestion;
• forwarding the control message to one or more of the plurality of switches;
• selecting one of the plurality of switches to rebalance the one or more data flows based at least in part on the control message.

A method comprising:

• by a controller including a non-transitory memory:
• receiving congestion window data associated with a first path of a network from a virtual server that is part of the network;
• determining whether the congestion window data indicates that a congestion window associated with the virtual server has been reduced at a rate greater than a predetermined threshold;
• instructing a switch of the network to generate a control message indicating when it is determined that the congestion window has been reduced at a rate greater than the predetermined threshold.