Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
25
No
.
Items to check and commands Action
Use the show efmoam operation command to make sure
information other than Forced Down or Down is displayed for
the target port.
Use the show loop-detection operation command to make
sure that the port has been released from the blocked state set
by the L2 loop detection frame and that Up is displayed.
After checking the port as described above, if you are using the
link aggregation standby link functionality, continue with No. 8.
If you are not using that functionality, continue with No. 9.
8 Use the show channel-group
operation command to check the link
aggregation standby link status.
If Mode:Static and Max Active
Port:number-of-ports(link-down mode) are displayed
and State:Detached is displayed for the target port, the
standby status is set. (The link-down port used as the operating
port has been switched to the standby port by the standby link
functionality).
Wait until the display changes to State:Distributing.
9 Use the show logging operation
command to check the operation log for
the port.
Based on the log entry for the line displayed by the show
logging operation command, see the Message Log
Reference and take the action described for Action.
3.4.2 Actions to be taken for 10BASE-T/100BASE-TX problems [AX1250S]
[AX1240S]
If a 10BASE-T/100BASE-TX problem occurs, use the procedure below to isolate the
failure.
1. Viewing logged data
For details about the information in the operation log, see the Message 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 3-11 Failure analysis method for 10BASE-T/100BASE-TX problems [AX1250S]
[AX1240S]
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 following
item for the target line:
If there is a count, see
Line quality is
degraded.
Check the cable type. For the cable types, see the
Hardware Instruction Manual.
Check the cable length. For the cable length, see the
Hardware Instruction Manual.
Check whether the cables are connected correctly (for
example, check for incomplete insertion). For cable
connections, see the Hardware Instruction Manual.