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• Static aggregation mode—Aggregation is stable. The aggregation state of the member ports
are not affected by the peer ports.
• Dynamic aggregation mode—The peering system automatically maintains the aggregation
state of the member ports, which reduces the administrators' workload.
An aggregation group in static mode is called a "static aggregation group" and an aggregation group
in dynamic mode is called a "dynamic aggregation group."
Aggregating links in static mode
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 that are in up state with the same
attribute configurations as the aggregate interface.
The candidate ports are sorted in the following order:
1. Highest port priority
2. Full duplex/high speed
3. Full duplex/low speed
4. Half duplex/high speed
5. Half duplex/low speed
The candidate port at the top is chosen as the reference port.
• If multiple ports have the same port priority, duplex mode, and speed, the port that has been a
Selected port (if any) is chosen. If multiple ports have been Selected ports, the one with the
smallest port number is chosen.
• If multiple ports have the same port priority, duplex mode, and speed and none of them has
been a Selected port, the port with the smallest port number is chosen.
Setting the aggregation state of each member port
After a static aggregation group reaches the limit on Selected ports, ports attempting to join the
group are put in Unselected state. This prevents traffic interruption on the existing Selected ports.
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