Embodiments of this application disclose a packet sending method. A first IP packet may be obtained, where a packet header of the first IP packet includes a tenant identifier of a tenant corresponding to the first IP packet. After the first IP packet is obtained, the first IP packet is sent to a VAS device, where the VAS device is configured to perform, based on the tenant identifier, a value-added service corresponding to the tenant. Because the packet header of the first IP packet includes the tenant identifier of the tenant corresponding to the first IP packet, after receiving the first IP packet, the VAS device may obtain the corresponding tenant identifier of the tenant by parsing the first IP packet, and further perform, based on the tenant identifier, the value-added service corresponding to the tenant. It can be learned that, according to this solution, there is no need to plan a network in advance to distinguish between tenants. The tenant identifier corresponding to the tenant may be directly obtained from the packet, so that different tenants are distinguished.