IEEE 802.3ad Link Aggregation troubleshooting
Use the entstat command to troubleshoot IEEE 802.3ad Link Aggregation.
If you are having trouble with your IEEE 802.3ad Link Aggregation, use
the following command to verify the mode of operation of the Link Aggregation:
entstat -d device
where device is the Link Aggregation device.This will also make a best-effort determination of the status of the progress
of LACP based on the LACPDUs received from the switch. The following status
values are possible:
Inactive
: LACP has not been initiated. This is the status when a Link Aggregation has not yet been configured, either because it has not yet been assigned an IP address or because its interface has been detached.Negotiating
: LACP is in progress, but the switch has not yet aggregated the adapters. If the Link Aggregation remains on this status for longer than one minute, verify that the switch is correctly configured. For instance, you should verify that LACP is enabled on the ports.Aggregated
: LACP has succeeded and the switch has aggregated the adapters together.Failed
: LACP has failed. Some possible causes are that the adapters in the aggregation are set to different line speeds or duplex modes or that they are plugged into different switches. Verify the adapters' configuration.In addition, some switches allow only contiguous ports to be aggregated and may have a limitation on the number of adapters that can be aggregated. Consult the switch documentation to determine any limitations that the switch may have, then verify the switch configuration.
Note: The Link Aggregation status is a diagnostic value and does not
affect the AIX® side of the configuration.
This status value was derived using a best-effort attempt. To debug any aggregation
problems, it is best to verify the switch's configuration.
The following IEEE 802.3ad Link Aggregation statistics represent the status of the LACP on each port of the aggregation.
They are shown for both the Actor (the IEEE 802.3ad Link Aggregation) and for the Partner (the switch port).
System Priority:
priority value for this systemSystem:
value that uniquely identifies this systemOperational Key:
value that denotes which ports may beaggregated together
Port Priority:
priority value for this portPort:
unique value that identifies this port in the aggregationState:
LACP activity:
Active or Passive - whether to initiatesending LACPDUs always, or only in response to
another LACPDU: the IEEE 802.3ad Link Aggregation
will always operate in Active mode
LACP timeout:
Long or Short - time to wait beforesending LACPDUs: the IEEE 802.3ad Link Aggregation
will always use the long timeout
Aggregation:
Individual or Aggregatable - whether thisport can form an aggregation with other ports, or
if it can only form an aggregation with itself:
the port in a one-adapter IEEE 802.3ad Link Aggregation
will be marked as Individual, or Aggregatable
if there are more than one ports
Synchronization:
IN_SYNC or OUT_OF_SYNC - whether theaggregation has determined it has reached
synchronization with the partner
Collecting:
Enabled or Disabled - whether the IEEE 802.3adLink Aggregation is collecting (receiving) packets
Distributing:
Enabled or Disabled - whether the IEEE 802.3adLink Aggregation is distributing (sending) packets
Defaulted:
True or False - whether the IEEE 802.3adLink Aggregation is using default values for
the partner's information
Expired:
True or False - whether the IEEE 802.3adLink Aggregation is operated in expired mode
The following statistics are shown on both a port-by-port and aggregate basis:
Received LACPDUs:
LACPDU packets receivedTransmitted LACPDUs:
LACPDU packets sent outReceived marker PDUs:
marker PDUs receivedTransmitted marker PDUs:
marker PDUs sent:this version of the protocol does not implement the
marker protocol, so this statistic will always be zero
Received marker response PDUs:
marker PDUs receivedTransmitted marker response PDUs:
marker response PDUs sent:this version of the protocol does not implement the
marker protocol, so this statistic will always be zero
Received unknown PDUs:
PDUs received of unknown typeReceived illegal PDUs:
PDUs received of known type, but whichwere malformed, of unexpected length, or unknown subtype