4
Troubleshooting flowchart
Figure 2 Flowchart for troubleshooting a link aggregation failure
Solution
To resolve the issue:
1.
Verify that all physical interfaces are correctly connected.
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 procedure in "
" to resolve
the issue.
3.
Verify that the member ports have the same attribute configuration and class-two configuration
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
configuration of the aggregate interface and Unselected ports.
c.
Reconfigure the Unselected ports with the same attribute configuration and class-two
configuration as the reference port.
Physical connections
correct?
All member ports up?
Connect physical links
correctly
Bring up down member ports
No
Yes
No
Yes
Attribute/class-two
configuration of member ports same as
reference port?
Modify attribute/class-two
configuration of member ports
No
Yes
Remove member ports
Yes
No
More than 8 member ports?
Attribute/class-two configuration
of peer member ports same as peer port of
reference port?
Modify attribute/class-two
configuration of peer
member ports
No
Yes
End
Link 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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support
