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3.  Verify that the member ports have the same operational key and attribute configurations as the 
reference port: 
a.  Execute the display link-aggregation verbose command to display the Selected 
state of the member ports. 
b.  Execute the display current-configuration interface command to display the 
configurations of the aggregate interface and the Unselected ports. 
c.  Configure the Unselected ports to make sure they have the same operational key and 
attribute configurations as the reference port. 
4.  Identify the aggregation mode of the aggregation group. 
{  If the aggregation mode is static, proceed to step 6. 
{  If the aggregation mode is dynamic, proceed to step 5. 
5.  Verify that the peer member ports have the same operational key and attribute configurations 
as the peer port of the reference port: 
a.  Execute the display current-configuration interface command on the peer 
device to display the configurations of the peer member ports. 
b.  Configure the peer member ports to make sure the peer ports have the same operational 
key and attribute configurations as the peer port of the reference port. 
6.  Verify that the number of member ports in the aggregation group does not exceed the 
configured maximum number of Selected ports. 
a.  Execute the link-aggregation selected-port maximum command to set the 
maximum number of Selected ports allowed in the aggregation group. The value range is 1 
to 16. 
b.  Execute the display link-aggregation verbose command to verify that the number 
of member ports does not exceed the configured maximum number of Selected ports. 
If the number of member ports exceeds the maximum number of Selected ports, the ports 
with higher port numbers are in Unselected state. 
c.  Use the undo port link-aggregation group command to remove undesired member 
ports from the aggregation group. 
This ensures that all member ports you assign to the aggregation group can become 
Selected ports. 
7.  If the issue persists, contact H3C Support. 
Related commands 
This section lists the commands that you might use for troubleshooting Ethernet link aggregation. 
 
Commands Description 
display current-configuration interface 
Displays interface configuration. 
display interface 
Displays Ethernet interface information. 
display link-aggregation verbose  
Displays detailed information about the 
aggregation groups that correspond to the 
existing aggregate interfaces. 
link-aggregation selected-port maximum 
Configures the maximum number of Selected 
ports allowed in an aggregation group.