NEC IP8800/S2400 Series Troubleshooting Manual page 96

3.
Troubleshooting Functional Failures in Operation
2. Isolating the problem according to the failure analysis method
Isolate the problem according to the failure analysis method listed below.
Table 3-11: Failure Analysis Method for Troubles on 10GBASE-R
No. Troubleshooting Steps
1 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.
• Signal detect errors
• LOS of sync
[IP8800/S6700]
[IP8800/S6600]
[IP8800/S6300]
• HI_BER
[IP8800/S6700]
[IP8800/S6600]
[IP8800/S6300]
• LF
[IP8800/S6700]
[IP8800/S6600]
[IP8800/S6300]
2 According to the receiving error
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.
• CRC errors
• Symbol errors
34
Problem
Line quality on Check the type of fiber optics. For the fiber optics type, see "Hardware
receiving side is Installation Guide."
degraded.
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 receiving function. See the execution results of the no test
interfaces command and follow the indicated actions. For the test
type to be specified, see
Line quality on Check the type of fiber optics. For the fiber optics type, see "Hardware
receiving side is Installation Guide."
degraded.
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 receiving function. See the execution results of the no test
interfaces command and follow the indicated actions. For the test
type to be specified, see
Action
"6.1 Testing Line."
"6.1 Testing Line."