Consistent flow assignment in load balancing

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors, cause the one or more processors to:
• receive first information identifying a plurality of server devices and second information identifying a plurality of flows destined for the plurality of server devices, the plurality of flows to be assigned to the plurality of server devices or a plurality of links between a network device and the plurality of server devices;
• assign the plurality of flows to the plurality of server devices in a first manner based on receiving the first information and the second information;
• store the second information in a plurality of data structures to record assignment of the plurality of flows to the plurality of server devices based on assigning the plurality of flows to the plurality of server devices, a data structure, of the plurality of data structures, corresponding to a respective server device of the plurality of server devices;
• receive an indication that a first server device has been added to, or removed from, the plurality of server devices after storing the second information, the indication being received based on monitoring a link, of the plurality of links, between the network device and one of the plurality of server devices;
• and
• reassign a subset of the plurality of flows in a second manner using third information identifying an order in which the plurality of flows were assigned to the plurality of server devices based on receiving the indication, the second manner being different from the first manner, and the second manner including a first assigned, first reassigned order.

A method, comprising:

• receiving, by a device, first information identifying multiple server devices and second information identifying multiple flows, the multiple flows to be assigned to the multiple server devices;
• assigning, by the device, the multiple flows to the multiple server devices in a first manner based on receiving the first information and the second information;
• storing, by the device, the second information in multiple data structures to record the assignment of the multiple flows to the multiple server devices based on assigning the multiple flows to the multiple server devices, a data structure, of the multiple data structures, corresponding to a respective server device of the multiple server devices;
• receiving, by device, an indication that a server device has been added to, or removed from, the multiple server devices after storing the second information, the indication being received based on monitoring a link between the device and one of the multiple server devices;
• and
• reassigning, by the device, a subset of the multiple flows in a second manner using third information identifying an order in which the multiple flows were assigned to the multiple server devices based on receiving the indication, the second manner being different from the first manner, and the second manner including a first assigned, first reassigned order.