This disclosure relates to network configuration using multicast address modulation. In one aspect, a method includes dividing data for completing network configuration of a device. Multiple packets are selected from the divided data. A total length of data in the multiple packets is obtained. Multicast address modulation is performed on indexes of the multiple packets to obtain a multicast target address. Data in the multiple packets is parsed based on the total length of the data in the multiple packets and the multicast target address.