Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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3.5.5 Actions to be taken for 10GBASE-R/40GBASE-R problems
If a 10GBASE-R/40GBASE-R problem occurs, use the procedure below to isolate the failure.
1. Checking the log
For details about the log, see the manual Message and Log Reference.
2. Isolating the cause of the problem according to the failure analysis method
Isolate the cause of the problem according to the failure analysis method described in the
following table.
Table 3-12: Failure analysis method for 10GBASE-R/40GBASE-R problems
6Use the show
interfaces command to
display the failure
statistics, and check
whether there is a count for
the following item 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.
7Use the
show qos
queueing command to
check whether there is a
count for the following
item. If there is a count, see
the Cause and Action
columns.
• discard_pkt
Packets are
discarded.
Check whether drop control and the shaper are being used
appropriately in the system configuration.
No. Items to check Cause Action
1Use the
show interfaces
command to display the
failure statistics, and check
whether there is a count for
the following item for the
target port. If there is a
count, see the Cause and
Action columns.
For AX6700S, AX6600S, or
AX6300S series switches:
- Signal detect errors
- LOS of sync
- HI_BER
- LF
For AX3800S, AX3600S, or
AX2400S series switches:
- Signal detect errors
Line quality on
the receiving
side is degraded.
Check the type of the optical fiber. For the types, see the
Hardware Instruction Manual.
If an optical attenuator is used, check the attenuation value. For
the optical level, see the Hardware Instruction Manual.
Check the cable length. For the cable length, see the Hardware
Instruction Manual.
No. Items to check Cause Action