Alaxala AX2500S, Troubleshooting Manual

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3 Troubleshooting Functional Failures During Operation
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Table 3-10 Failure analysis method for direct attach cable problems [10G models]
No. Items to check Cause Action
1 Use the
show
interfaces operation
command to display the
failure statistics, and
check whether there is a
count for the item shown
below for the target line.
If there is a count, see the
Cause and Action
columns.

Link down
Line quality on
the receiving
side is
degraded. Check the direct attach cable type.
Check whether the cable is connected correctly (for
example, check for incomplete insertion). For cable
connections, see the
Hardware Instruction Manual .
2 Use the
show
interfaces
operation
command to display the
receive-error statistics,
and check whether there
is a count for the item
shown below for the
target line. If there is a
count, see the
Cause and
Action columns.

CRC errors
Line quality on
the receiving
side is
degraded. Check whether the cable is connected correctly (for
example, check for incomplete insertion). For cable
connections, see the
Hardware Instruction Manual .
3 Use the
show
interfaces
operation
command to display the
failure statistics, and
check whether there is a
count for the item shown
below for the target port.
If there is a count, see the
Cause and Action
columns.

Long frames
Packets
exceeding the
maximum
allowed frame
length are
received. Adjust the jumbo frame settings to those on the remote
device.
3.4.6 Communication failures when link aggregation is used
If communication is not possible or if degraded operation is in effect when link aggregation
is used, isolate the cause of the problem according to the failure analysis method in the
following table.
Table 3-11 Communication failure analysis method when link aggregation is used
No. Items to check and commands Action
1 Use the
show channel-group
detail
operation command to
check the link aggregation setting
that caused the communication
failure.
Make sure the link aggregation mode is the same as the mode for
the remote device. If the modes are different, set the same link
aggregation mode that is set for the remote device.
If the link aggregation modes match, check whether the LACP
start method is set to
passive
for both ports. If
passive
is set for
both ports, change the setting of one of the ports to
active
.