The following command defines whether LACP is enabled on a port, and whether it is in active or passive mode when enabled. When LACP is enabled and active, the port sends LACP packets and listens to them. When LACP is enabled and passive, the port sends LACP packets only if it is spoken to. When LACP is disabled, the port ignores LACP packets. If the command is issued without a mode parameter, 'active' is assumed. During dynamic link aggregation using LACP, ports with the same key are aggregated as a single trunk. MAD passthrough applies only to trunks and not to physical ports.