DYNAMIC FAST LINK AGGREGATION CONTROL PROTOCOL

A computer network device (such as a switch or a router) that implements a trunk is described. During operation, the computer network device may receive a link aggregation group (LAG) command. In response, the computer network device may access a user LAG configuration and information specifying events for ports. Moreover, the computer network device may receive packet data units (PDUs) associated with the ports. Then, the computer network device may determine a dynamic LAG based at least in part on the user LAG configuration, the information and the PDUs. Next, the computer network device may implement the trunk having member ports in a physical layer based at least in part on the dynamic LAG, where the member ports in the trunk include at least a subset of member ports in the dynamic LAG.