Aggregating Links In Static Mode - HP 6125G Configuration Manual

Aggregation
mode
Dynamic
The following points apply to a dynamic link aggregation group:
A Selected port can receive and send LACPDUs.
•
An Unselected port can receive and send LACPDUs only if it is up and has the same class-two
•
configurations as the aggregate interface.

Aggregating links in static mode

LACP is disabled on the member ports in a static aggregation group. You must manually maintain the
aggregation state of the member ports.
The static link aggregation process comprises:
Selecting a reference port
•
• Setting the aggregation state of each member port
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 aggregation priority, duplex, and speed in the following order:
Lowest aggregation priority value
•
• Full duplex/high speed
Full duplex/low speed
•
Half duplex/high speed
•
• Half duplex/low speed
The one at the top is selected as the reference port. If two ports have the same aggregation priority,
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, as shown in
ports, any port assigned to the group is placed in Unselected state to avoid traffic interruption on the
current Selected ports.
LACP status on
Pros
member ports
The administrator does not need to
maintain link aggregations. The
Enabled peer systems maintain the
aggregation state of the member
ports automatically.
Figure 6. After the static aggregation group has reached the limit on Selected
32
Cons
Aggregation is unstable. The
aggregation state of the member
ports is susceptible to network
changes.