HP A5120 EI Series Configuration Manual page 40

Selecting a reference port
The system selects a reference port from the member ports that are:
 Are in the up state and have
Have the same class-two configurations as the aggregate interface.

The candidate ports are sorted by duplex and speed in this order: full duplex/high speed, full
duplex/low speed, half duplex/high speed, and half duplex/low speed. The one at the top is selected as
the reference port. If two ports have the same duplex mode and speed, the one with the lower port
number wins.
Setting the aggregation state of each member port
After selecting the reference port, the static aggregation group sets the aggregation state of each member
port.
Figure 8 Setting the aggregation state of a member port in a static aggregation group
Set the aggregation state
of a member port
Is there any hardware restriction?
Port attribute/class 2 configurations
same as the reference port?
More candidate ports than max.
number of Selected ports?
Set the port in the Selected state
No
Is the port up?
Yes
Yes
No
Yes
No
No
Yes
Port number as low as to set
the port in the Selected state?
33
No
Yes
Set the port in the
Unselected state