Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
29
No
.
Items to check Cause Action
4 If automatic switching to
the SFP transceiver does
not occur when
1000BASE-SX2 is used,
check the usage of the
RJ45 port and the
media-type setting.
Both an SFP
transceiver and
RJ45 cable are
inserted when
automatic
media
detection has
been set.
When 1000BASE-SX2 and RJ45 are used, automatic
switching to the SFP transceiver does not occur even if
automatic media detection has been set because the
1000BASE-X (SFP) link is never enabled.
To use 1000BASE-SX2, use either of the following
methods:
 Use the media-type configuration command to set
a fixed media (specify sfp or rj45).
 Make sure an optical fiber cable and a UTP (RJ45)
cable are not inserted at the same time.
5 [AX1250S]
When 100BASE-FX is
used, execute the show
interfaces operation
command and check the
line type and line speed in
the detail information
displayed for the target
port. If the line type or
speed is invalid, see the
Cause and Action
columns.
The setting of
the speed,
duplex, or
media-type
configuration
command is
invalid.
Use configuration commands to specify the following
settings:
 speed:100
 duplex:full
 media-type:sfp
3.4.5 Actions to be taken for PoE problems [AX2200S] [AX1240S]
If a problem such as a disabled power supply occurs when PoE is used, isolate the cause
of the problem according to the failure analysis method described in the following table.
Table 3-14 Communication failure analysis method when PoE is used
No. Items to check and
commands
Action
1 Use the show power
inline operation command
to check the information
displayed for Status for the
target port.
 off displayed:
Power is not being supplied. Go to No. 2.
 denied displayed:
The supplied power is insufficient for the entire switch. Go to No. 3.
 faulty displayed:
The power supply unit to the connected device is disabled. Go to
No. 4.
 inact displayed:
The supply of power has been stopped by an operation command.
Go to No. 5.
2 Check whether shutdown is
set for the target port.
 When set:
Set no shutdown.
 When not set:
Make sure a power-receiving device is connected.
3 Use the show power
inline operation command
to check the values of
Threshold(W) and Total
Allocate(W).
Power cannot be supplied because the value of Total Allocate(W) is
larger than the value of Threshold(W).
Check the amount of power being supplied to the entire switch, the
amount of power allocation to the ports, and the power consumption by
the ports, and then adjust the allocation amount in the configuration.