Method and device for processing message

The embodiment of the invention discloses a method and a device for processing a message, through which not only the message forwarding and the study of the message source MAC (Media Access Control) realized are realized, but also the specification of an MAC forwarding table of an access switch is reduced, and both the cost and the realization complexity of the access switch are reduced. When receiving the message, the access switch finds an export corresponding to the message in the MAC forwarding table through an objective MAC address of the message; when the export is absent in the MAC forwarding table of the access switch, the access switch sends the message to a master port of a collection switch through a slave port; and when the export corresponding to the objective MAC address of the message is absent in the MAC forwarding table of the collection switch, the access switch receives the message sent by the collection switch and broadcasts the message in a broadcast domain. The invention is suitable for the communication field.