H3C S6850 Series, Configuration Manual

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Manual assignment —Manually assign interfaces to the dynamic link aggregation group.
•
Automatic assignment —Enable automatic assignment on interfaces to have them
automatically join a dynamic link aggregation group depending on the peer information in the
received LACPDUs.
NOTE:
When you use automatic assignment on one end, you must use manual assignment on the
other end.
Alternatively, you can use automatic link aggregation for two devices to automatically create a
dynamic link aggregation between them by using LLDP.
Automatic member port assignment
This feature automates the assignment of aggregation member ports to an aggregation group. You
can use this feature when setting up an aggregate link to a server.
As shown in Figure 3 , an interface enabled with automatic assignment joins a dynamic aggregation
group based on the peer information in the LACPDUs received from the aggregation peer. If none of
the existing dynamic aggregation groups is qualified, the device automatically creates a new
dynamic aggregation group, Then, the device assigns the interface to that group and synchronizes
the interface's attribute configurations to the aggregate interface.
A dynamic aggregation group that contains automatically assigned member ports selects a
reference port and Selected ports as described in "
How dynamic link aggregation works ." The
assignment methods of member ports do not change the processes of reference port selection and
Selected port selection.
Figure 3 Automatic member port assignment process
Automatic link aggregation
Automatic link aggregation enables two devices to automatically create a dynamic link aggregation
between them by using LLDP.
Does the reference port have
the same peer information as the
LACPDUs?
Does a preferred aggregation
group exist?
Yes
No
Yes
No
An interface enabled with
automatic link aggregation
receives LACPDUs
Assign the interface to the
aggregation group
Does an aggregation
group matching the LACPDUs
exist?
Yes
No
Create a dynamic aggregation
group based on the peer
information in the LACPDUs