Choosing a reference port
When setting the aggregation state of the ports in an aggregation group, the system automatically chooses a member port as the reference port. A Selected port must have the same operational key and attribute configurations as the reference port.
The system chooses a reference port from the member ports in up state.
The candidate reference ports are organized into different priority levels following these rules:
In descending order of port priority.
Full duplex.
In descending order of speed.
Half duplex.
In descending order of speed.
From the candidate ports with the same attribute configurations as the aggregate interface, the one with the highest priority level is chosen as the reference port.
If multiple ports have the same priority level, the port that has been Selected (if any) is chosen. If multiple ports with the same priority level have been Selected, the one with the smallest port number is chosen.
If multiple ports have the same priority level and none of them has been Selected, the port with the smallest port number is chosen.