NEC IP8800/S2400 Series, Руководство по устранению неисправностей

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3.
Troubleshooting Functional Failures in Operation
35
3.4.6 Communication Failure on Using PoE
If electricity is not provided when PoE is in use, isolate the problem using the failure analysis methods listed in the
following table.
Table 3-12: Communication Failure Analysis Methods When PoE Is in Use
3 According to the failure
statistical information displayed
by the
show interfaces
command, check to see if the
statistical information below is
counted for the port. If counted,
see "Problem" and "Action"
columns.
[IP8800/S6700]
[IP8800/S6600] [IP8800/
S6300]
•
RF
Line quality on
sending side is
degraded. Check the type of fiber optics. For the fiber optics type, see "Hardware
Installation Guide."
Check the attenuation value if an optical attenuator is used. For the
optical level, see "Hardware Installation Guide."
Check the cable length. For the cable length, see "Hardware Installation
Guide."
Check to see if the cable is connected correctly. Check to see if end
surfaces of the cable are dirty. If they are dirty, remove the dirt.
Check to see if the transceiver is connected correctly.
For the transceiver, follow the segment standard on the remote system.
Check to see if the optical level is correct. For the optical level, see
"Hardware Installation Guide."
Perform the line test on this system and confirm that there is no problem
in the sending function. See the execution results of the
no test
interfaces
command and follow the indicated actions. For the test
type to be specified, see " 6.1 Testing Line ."
4 According to the failure
statistical information displayed
by the
show interfaces
command, check to see if the
statistical information below is
counted for the port.
If counted, see "Problem" and
"Action" columns.
• Long frames
Packets with
invalid frame
length are received. Follow the jumbo frame setting on the remote system.
5 Check to see if statistics in the
following is not counted by the
show qos queueing
command. If it is counted, see
"Problem" and "Action"
columns.
• discard_pkt
Packets are being
discarded. Review the system maintenance using discard control and shaper.
No. Troubleshooting Steps and Command Action
1 Check to see PoEStatus display on the port by
the
show power inline command.
• PoEStatus indicates off
Electricity is not provided. Go to No.2.
• PoEStatus indicates denied
A shortage of electricity to the whole equipment occurs. Go to No.3.
•
PoEStatus indicates faulty
Electricity is unable to be provided to the connected equipment. Go to No.4.
2 Check to see if the port is shutdown.
• The port is shutdown
Use the
no shutdown command.
• The port is not showdown
Check to see if Power receiving equipment is connected properly.
No. Troubleshooting Steps Problem Action