Logical channel establishing method and system, edge virtual bridging station and bridge

Provided are a logical channel establishing method and system, an edge virtual bridging (EVB) station, and a bridge. The method includes: an EVB station respectively sending a first CDCP message to a first EVB bridge and a second EVB bridge, both of which belong to a same LAG portal, to request for SVIDs corresponding to required logical S-channels, wherein the EVB station requests the first EVB bridge for SVIDs of a part of logical S-channels in the required logical S-channels, and the EVB station requests the second EVB bridge for SVIDs of the rest part of logical S-channels in the required logical S-channels; the EVB station respectively obtaining the SVIDs allocated by the first EVB bridge and the second EVB bridge according to the first CDCP message; and the EVB station configuring the allocated SVIDs to the corresponding logical S-channels, and respectively sending a second CDCP message to the first EVB bridge and the second EVB bridge, to respectively inform the first EVB bridge and the second EVB bridge of all SVIDs configured by the EVB station for the required logical S-channels.