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• When the configured mode is auto, the operating mode of the FC aggregate interface is the same
as the first member interface that goes up at the link layer. Possible operating modes are E or F.
To change the operating mode of an FC aggregate interface, perform the following tasks:
1. Execute the shutdown command to shut down the FC aggregate interface.
2. Configure a new operating mode for the FC aggregate interface.
3. Execute the undo shutdown command to bring up the FC aggregate interface.
Then, all member interfaces will perform link negotiation again.
Choosing Selected member interfaces
Any of the following conditions might trigger a process of choosing Selected member interfaces from
member interfaces:
• A new member interface joins the FC aggregation group.
• A member interface leaves the FC aggregation group.
• The state (up or down) of a member interface changes.
The states of FC aggregation group member interfaces are determined as follows:
• When the configured mode of an FC aggregate interface is F, E, or NP, the configured mode of the
member interfaces is the same as the FC aggregate interface. The member interfaces perform link
negotiation based on the configured mode. All member interfaces that pass the negotiation and
have the highest speed become Selected.
• When the configured mode of an FC aggregate interface is auto, the configured mode of the
member interfaces is also auto. The member interfaces perform link negotiation based on the auto
mode. The operating mode negotiation result might be E or F mode. The operating mode of the FC
aggregate interface is the operating mode of the first member interface that goes up at the link layer.
All interfaces operating in the same mode as the FC aggregate interface and with the highest
speed are Selected.
When an FC aggregation group has Selected member interfaces, the FC aggregate interface physically
goes up and negotiates VSAN parameters. To modify VSAN settings of an FC aggregate interface,
perform the following tasks:
1. Execute the shutdown command to shut down the FC aggregate interface.
2. Modify VSAN settings of the FC aggregate interface.
3. Execute the undo shutdown command to bring up the FC aggregate interface.
Then, all member interfaces will perform link negotiation again.
Speed of an FC aggregate interface
The speed of an FC aggregate interface is the sum of the speed of each Selected member interface in the
FC aggregation group.
Load sharing mode
An FC aggregate interface forwards traffic through its Selected member interfaces. When multiple
Selected member interfaces exist in an FC aggregation group, the switch chooses some of the Selected
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