How to determine the actor and partner of an Eth-Trunk in LACP mode

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The Actor and Partner of an Eth-Trunk in LACP mode are determined as follows:
The device with a smaller system LACP priority functions as the Actor. The System Priority field and the SysPri field of the Partner in the display eth-trunk command output represent system LACP priorities of local and remote devices respectively. A smaller value indicates a higher priority. By default, the system LACP priorities of devices are both 32768.
If system LACP priorities of devices at both ends of the Eth-Trunk are the same, the device with a smaller MAC address functions as the Actor. The System ID field and the System ID field of the Partner in the display eth-trunk command output represent system MAC addresses of local and remote devices respectively.

Other related questions:
How to determine active interfaces among member interfaces of an Eth-Trunk in LACP mode
When the status of member interfaces of an Eth-Trunk is different, the switch determines active interfaces according to interface priorities. Check LACP priorities of member interfaces on the Actor. A smaller LACP priority indicates a higher priority of the member interface. By default, LACP priorities of member interfaces are 32768. If member interfaces have the same LACP priority, check interface numbers of member interface. A smaller interface number indicates a higher priority of the member interface.

How do I configure link aggregation in LACP mode on S series switches
Configure link aggregation in LACP mode on S series switches (except the S1700) as follows: # Create Eth-Trunk 1 on a switch and configure Eth-Trunk 1 to work in LACP mode. [HUAWEI] interface eth-trunk 1 [HUAWEI-Eth-Trunk1] mode lacp [HUAWEI-Eth-Trunk1] quit

How to determine the number of member interfaces in an Eth-Trunk
To ensure normal forwarding of burst traffic on an Eth-Trunk, the total bandwidth of the Eth-Trunk must be higher than the bandwidth of an interface that forwards normal traffic. To ensure that member interfaces of an Eth-Trunk evenly load balance traffic, you can use two, four, or eight member interfaces.

Does an Eth-Trunk support LACP priority preemption
An Eth-Trunk supports LACP priority preemption only in LACP mode. You can run the lacp preempt enable command to enable LACP priority preemption. In LACP mode, when an active link fails, the system selects the link with the highest priority from backup links to replace the faulty one. After the faulty link recovers and the priority of the link is higher than that of the backup one, if LACP priority preemption is enabled, the link with a high priority replaces the link with a low priority and switches to active. LACP priority preemption configuration at both ends of an Eth-Trunk must be the same.

How is the LACP mode configured when a CE switch connects to a third-party device through an Eth-Trunk
Run the mode { lacp-static | lacp-dynamic | manual [ load-balance ] } command in the Eth-Trunk interface view to configure the LACP mode of the Eth-Trunk on the CE switch. When a CE switch connects to a third-party device, the LACP modes must be consistent on the two ends. Mainstream network devices that connect to CE switches include devices from Cisco, Juniper, and H3C. The table on the right describes the mapping between aggregation modes.

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