NEC IP8800/S6300 Manuale Utente

3.   

Troubleshooting Functional Failures in Operation

34

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

Problem

Action

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

• HI_BER

• LF

Line quality on 
receiving 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 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 "

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

Line quality on 
receiving 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 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 "