Datasheet

Installing 2T16S Network Processor Modules in the Cisco 4000 Series
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Installing 2T16S Network Processor Modules in the Cisco 4000 Series
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The key to problem solving in this system is to try to isolate the problem to a specific subsystem. By
comparing what the system is doing to what it should be doing, the task of isolating a problem is greatly
simplified.
When problem solving, consider the following subsystems of the router:
• Power system—This subsystem includes the power supply and the wiring.
• Cooling system—The fan should go on when power is applied.
• Network processor modules—Problems with these modules can be the most difficult to
troubleshoot. The LEDs on the network processor modules can be used to help identify a failure. For
complete information on LED indications, refer to the section “Reading Chassis Front Panel LEDs,”
page 17.
• System cables—This subsystem includes all the external cables that connect the router to the
network.
Troubleshooting the Network Processor Modules and Cables
Check for the following symptoms to help isolate the problem:
• Network processor module is not recognized by the system when you use the Cisco IOS show
version command.
– Check the front panel OK LED for the module. The OK LED should be on.
– Check the LEDs on the network processor module.
– Check to make sure the network processor module’s connection to the motherboard is fully
seated.
– If the module has one or more daughter cards, check to make sure their connections to the
module are correctly seated.
– Check that the correct software version is installed. Refer to the section “Software
Compatibility” located near the beginning of this document.
• Network processor module is recognized when you use the show interface command, but interface
port(s) will not initialize.
– Check to make sure the network processor module’s connection to the motherboard is fully
seated.
– Check the external cables for connection.
– Use the show interface command to make sure the module is not administratively shut down.
• System does not boot properly, or constantly or intermittently reboots.
– Check to make sure the network processor module’s connection to the motherboard is fully
seated.
– Check that the correct software version is installed. Refer to the section “Software
Compatibility” located near the beginning of this document.
– Remove each network processor module one at a time. With each module removed, reboot the
system. If the system boots properly when one of the modules is removed, the module might be
at fault.
• System boots, but console screen is frozen.
– Check the external console connection.
– Verify the console baud rate in the documentation for the terminal.