Nortel Passport 8000 Series, Installing And Maintaining

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90 Chapter 4 Operating the Passport 8000 Series switch
316314-E Rev 01
Troubleshooting
The following sections provide troubleshooting information for some of the more
common problems that you may encounter with the Passport 8000 Series switch.
LED indications of problems
Table 14 lists possible problems indicated by the LEDs on the switch modules and
suggests corrective action.
Topic Page
LED indications of problems 90
Apparent module failure 91
Failure to get a login prompt from the Console port 92
Cable connection problems 93
Table 14 LED problem indicators
Symptom Probable cause Corrective action
Green AC power supply
LEDs are off. The switch is not receiving
AC power or the power supply
has failed. Verify that each AC power cord is fastened
securely at both ends and that power is
available at each AC power outlet. Plug in a
device such as a lamp to ensure that the
power outlet is operational. Verify that each
power supply is turned on.
The Link/Activity LED for a
connected port is off or
does not blink (and you
believe that traffic is
present). The switch is experiencing a
port connection problem, or
the switch’s link partner is not
auto-negotiating properly. Verify that the cable connections to the link
partner are correct. Verify port configuration
parameters for both ends of the connection.
Move the cable to another port to see whether
the problem occurs on the new port.
The Link/Activity LED blinks
continuously. There may be a high traffic
load or possible packet
broadcast storm. Verify port configuration parameters for both
ends of the connection.
The Online LED is steady
amber for longer than 3
minutes. Software incompatibility
exists, or the module cannot
communicate with the master
module over the backplane. Use the
show log
command to check the
system log for indications of communication
problems. Use the
boot
command to
download a new software image.