NEC IP8800/S2400 Series Troubleshooting Manual page 93

Table 3-9: Troubleshooting for Failed 10BASE-T/100BASE-TX/1000BASE-T
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.
• Link down
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
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.
• MDI cross over changed
4 Check the line type/line
speed for the port according
to the "Port detail"
information generated by the
show interfaces
command.
If the line type/line speed is
not correct, see the
"Problem" and "Action"
columns.
Problem
Line quality is Check to see if the cable type is correct. For the fiber optics type, see
degraded. "Hardware Installation Guide."
Check to see if MDI-X is selected for pin mapping in the case of the
following:
• The port setting is fixed.
• The port setting is auto negations and auto MDIX function is
disabled.
Check the cable length. For the cable length, see "Hardware Installation
Guide."
Check to see if the cable is connected correctly.
Replace with the connection interface supported by this system. For the
connection interfaces supported by this system, see "Configuration
Settings."
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 (Ethernet) command and follow the indicated actions.
For the test type to be specified, see
Line quality is Check to see if the cable type is correct. For the fiber optics type, see
degraded. "Hardware Installation Guide."
Check to see if MDI-X is selected for pin mapping in the case of the
following:
• The port setting is fixed.
• The port setting is auto negations, and auto MDIX function is
disabled.
Check the cable length. For the cable length, see "Hardware Installation
Guide."
Check to see if the cable is connected correctly.
Replace with the connection interface supported by this system. For the
connection interfaces supported by this system, see "Configuration
Settings."
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
Pin mapping of the Correct the pin mapping. For pin mapping, see the manual
cable is not correct. "Configuration Settings."
An incompatible Check to see if the cable type is correct. For the fiber optics type, see
cable is used. "Hardware Installation Guide."
The values set for Use the same values as the remote system in configuration commands
configuration speed and duplex.
commands speed
and duplex are
incompatible with
the target system.
3.
Troubleshooting Functional Failures in Operation
Action
"6.1 Testing
"6.1 Testing Line."
Line."
31