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Troubleshooting flowchart
Figure 4 Troubleshooting a link aggregation failure
Solution
To resolve the problem:
1. Verify that all physical connections are correct.
You can verify the physical connections against your network plan.
2. Verify that all member ports are up:
a. Execute the display interface command to display the status of the member ports.
b. If the member ports are down, follow the solution in "Troubleshooting ports" to trouble
shoot
the problem.
3. Verify that the member ports have the same operational key and attribute configurations as the
reference port:
Are all physical connections correct?
Are all member ports up?
Connect physical links correctly
Bring all member ports up
No
Yes
No
Yes
Operational key/attributes same as the
reference port?
Set operational key/attributes
same as the reference port
No
Yes
Set the number of member ports
less than or equal to upper limit on
Selected ports
Yes
No
More member ports than upper limit on
Selected ports?
Operational key/attributes of the peers same as
the peer of the reference port?
Set operational key/attributes of
the peers same as the peer of
the reference port
No
Yes
End
Aggregation
failed
Link aggregation in dynamic mode?
Yes
No
Resolved?
Resolved?
Resolved?
Resolved?
Resolved?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
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