Abstract: A network device calculates an idle forwarding capability of a target egress queue or a target egress port on the network device, where the idle forwarding capability represents a difference between an upper limit of a data forwarding amount of the target egress queue or the target egress port and a current actual forwarding amount. Then, the network device obtains a first packet carrying an adjustment request, and when the first packet does not have a preset mark, the network device obtains a decision result based on the idle forwarding capability and the adjustment request.