PACKET TRANSMISSION METHOD AND APPARATUS

Embodiments of this application disclose a packet transmission method and apparatus. After obtaining one or more control items, a first network device determines, based on a fact that a device identifier included in a first packet to which each control item belongs is a device identifier of a second network device, a target control item to be sent to the second network device. The first network device sends at least one second packet to the second network device, where the target control item is located in the at least one second packet, and the second packet includes the device identifier of the second network device. It can be learned that, when forwarding the control item to the second network device, the first network device determines, based on the device identifier of the second network device, the target control item required by the second network device, and then sends only the target control item to the second network device. This reduces pressure on the first network device to advertise the control item, and reduces network congestion. In addition, no filtering policy needs to be deployed on the second network device, thereby simplifying service deployment.