Distributed system and flow distribution method

The embodiment of the invention provides a distributed system and a flow distribution method, and relates to the technical field of network and infrastructure security. The distributed system comprises an interface board, a switch board and a plurality of service boards, the exchange board is respectively connected with the interface board and the service board; the interface board and the switch board are configured with a preset stacking rule, the preset stacking rule enables the interface board and the switch board to form a stacking system, an interface of the interface board and an interface of the switch board are configured as stacking ports of the stacking system, and the stacking system is configured with a preset ACL rule and a preset LAG group; and performing a flow forwarding operation between the interface board and the switch board according to the preset ACL rule and the preset LAG group. The distributed system can realize the technical effect of reducing the shunting complexity. 本申请实施例提供一种分布式系