Operation Manual – Link AggregationH3C S7500 Series Ethernet Switches Chapter 1 Link Aggregation Configuration1-10Note:For a static LACP aggregation group or a manual aggregation group, you arerecommended not to cross cables between the two devices at the two ends of theaggregation group. For example, suppose port 1 of the local device is connected to port2 of the peer device. To avoid cross-connecting cables, do not connect port 2 of thelocal device to port 1 of the peer device. Otherwise, packets may be lost.Note that:z LACP cannot be enabled on a port in a manual aggregation group.z You can add a LACP-enabled port to a manual aggregation group. In this case,the system will disable LACP on the port automatically. And, when you add aLACP-disabled port to a static aggregation group, the system will enable LACP onthe port automatically.1.2.3 Configuring a Dynamic LACP Aggregation GroupA dynamic LACP aggregation group is automatically created by the system based onLACP-enabled ports. The adding and removing of ports to/from a dynamic aggregationgroup are automatically accomplished by LACP.You need to enable LACP on the ports whom you want to participate in dynamicaggregation of the system, because, only when LACP is enabled on those ports at bothends, can the two parties reach agreement in adding/removing ports to/from dynamicaggregation groups.Note:LACP cannot be enabled on a port of a manual aggregation group.Follow these steps to configure a dynamic LACP aggregation group:To do… Use the command… RemarksEnter system view system-view —Configure a descriptionfor an aggregation grouplink-aggregation groupagg-id descriptionagg-nameOptionalBy default, an aggregationgroup has no description.Configure the systemprioritylacp system-prioritysystem-priorityOptionalBy default, the systempriority is 32,768.
