CH A P T E R 4 Troubleshooting the Installation This chapter provides troubleshooting guidelines for Cisco 12006 and Cisco 12406 Routers. If the solutions provided in this chapter do not make the router fully functional, contact your Cisco service representative for assistance. • Performing Other Configuration Tasks, page 4-1 • Problem Solving with Subsystems, page 4-14 Performing Other Configuration Tasks This section describes the following additional configuration tasks.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks – Flash memory SIMM (NVRAM) on the RP – Boot image stored within the operating environment, which you access by using an appropriate form of the boot command entered at the ROM monitor prompt (rommon>) • Define a default boot filename. • Enable or disable the Break function. • Control broadcast addresses. • Set the console terminal baud rate. • Force an automatic boot using a boot image.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Table 4-1 Software Configuration Register Bit Meanings (continued) Hexadecimal Definition/Function Bit Number1 Value 07 0x0080 Enables the OEM2 bit 08 0x0100 Disables the Break function 09 0x0200 Uses a secondary bootstrap 10 0x0400 Broadcasts Internet Protocol (IP) with all zeros 11 and 12 0x0800 to 0x1000 Defines the console baud rate (the default setting is 9600 bps) 13 0x2000 Boots the default Flash memo
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Table 4-2 Boot Field and Meanings (continued) Boot Field Definition 02 to 0F On power up, the system boots automatically from a default Cisco IOS software image stored on a TFTP server in the network. For this setting, it is assumed that the Ethernet port on the RP is configured and operational. This setting also enables boot system commands that override the default filename.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks If you enter the boot command with arguments (that is, by instructing the system to boot from a specific source), you have these options: – You can instruct the system to boot from a specific Flash SIMM image by entering the boot bootflash:filename command, or from a specific image stored on a PCMCIA Flash memory card by entering the boot slot #: imagename command.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Note If a bootable Cisco IOS software image exists in a Flash memory card inserted in PCMCIA slot 0 or slot 1, the software configuration register boot field setting is overridden. The system then boots from the Cisco IOS software image in the Flash memory card, rather than from a network TFTP image (that is, from a computed filename in the range from cisco2-grp through cisco17-grp or cisco2-prp through cisco17-prp).
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks This command sequence saves the new contents of the software configuration register to NVRAM, but these new settings do not take effect until you reload or reboot the router. Step 5 Enter the show version privileged EXEC command to display the software configuration register value currently in effect. This value will be used the next time the router reloads.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Bits in the Software Configuration Register This section provides more detailed descriptions of the significance of the bits in the software configuration register and how they interact during the boot process. As described in the “Boot Field Settings” section on page 4-4, the boot field setting determines the source of the Cisco IOS software image that is used to boot the router.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Note If a bootable Cisco IOS software image exists in a Flash memory card installed in PCMCIA slot 0 or 1, the configuration register setting is overridden, and the bootable Cisco IOS software image will be booted instead of the default TFTP-bootable Cisco IOS software image (cisco2-grp through cisco17-grp or cisco2-prp through cisco17-prp).
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Bit 8—Bit 8 of the software configuration register controls the console Break key. Setting bit 8 causes the system to ignore the console Break key. This is the factory default. Conversely, clearing bit 8 causes the system to interpret a Break keystroke as a command to halt normal system operation and force the system into ROM monitor mode.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Bit 13—Bit 13 of the software configuration register determines the system response to a bootload failure. Setting bit 13 causes the system to load Cisco IOS software from Flash memory after five unsuccessful attempts to load a boot file from the network TFTP server. Clearing bit 13 causes the system to continue attempting to load a boot file from the network TFTP server indefinitely.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Step 5 Within 5 seconds of turning on the router, press the Break key.
Chapter 4 Troubleshooting the Installation Performing Other Configuration Tasks Step 8 Enter no in response to the system configuration dialog prompts until the following instruction is displayed: Press RETURN to get started! Step 9 Press Return.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Step 14 Exit global configuration mode by entering Ctrl-Z. router(config)# Ctrl-Z router# Step 15 Reboot the router and use the recovered password with the enable command to gain access to the router. Problem Solving with Subsystems The key to solving problems in the system is to try to isolate the problem to a specific subsystem.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems • Cooling subsystem—Consists of the blower module, which circulates air through the card cages to cool the cards, and the fan in each of the power modules, which circulates cooling air through the power module bays. • Processor subsystem—Includes the RP, up to five line cards (when no optional, redundant RP is installed), and two alarm cards, which are located in the alarm card cage directly below the CSC card cage.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems • The RP sends the instructions to each line card to power up. Each line card processor begins to perform its own boot process. Each line card, through its MBus module, notifies the RP when the boot process is complete. • The RP sends a command to each switch fabric card to power up. As each switch fabric card powers up, its progress is monitored by its MBus module processor.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems AC-Input Power Supply LEDs Figure 4-1 shows the location of the LEDs on the power supply faceplate.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Table 4-6 summarizes the function of these indicators. Table 4-6 AC-Input Power Supply LED indicators LED Label Function State Description AC (Left LED) Input power On AC power source is present and is within specified limits. Off Power source is not within specified limits. DC (Right LED) Output Power On Power supply is operating normally in a power-on condition.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems DC-Input Power Entry Module LEDs Figure 4-2 shows the location of the LEDs on the DC-input PEM. Figure 4-2 DC-Input Power Entry Module LEDs 1 DC-input PEM 4 Captive screws on release levers 2 Handle 5 Air inlet for cooling fan 3 ON/OFF switch – – Table 4-7 summarizes the function of these indicators.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Blower Module LEDs Figure 4-3 shows the location of the LEDs on the blower module.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems When the system is operating correctly, you should see these LED states: • OK—Green. When on, the green OK LED indicates normal operation. • FAIL—Off. When on, the red FAIL LED indicates the system has detected a fan failure or other fault in the blower module.The red LED should remain off during normal operation. Alarm Card LEDs Figure 4-4 shows the location of the LEDs on the faceplate of the alarm card.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems LEDs that normally should be on: • One MBUS status LED labeled ENABLED • Two CSC status LEDs labeled ENABLED • Three SFC status LEDs labeled ENABLED RP Alphanumeric LED Displays Figure 4-5 shows the location of the alphanumeric LEDs on the RP faceplate.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Troubleshooting the Power Subsystem The power subsystem in the Cisco 12006 and Cisco 12406 Routers consists of the following components: • An AC PDU or a DC PDU • One or two AC-DC power supplies, or one or two DC-input PEMs • Backplane • DC-DC converters • MBus modules The power modules provide DC output to the system via the backplane. DC output from the alarm card powers the MBus modules on each card in the system.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems – For installations in North America, the AC input power range is between 100 and 240 VAC, with a 20A service. For international environments, the AC input power range is between 185 and 264 VAC, with a 16A service. – Power supplies are providing –48 VDC to internal components. – All internal DC voltages are within tolerance.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems If the AC power source wiring appears to be okay, but the power supply AC LED remains off, go to Step 3. Step 3 Step 4 Step 5 Plug the power cord into a different, but compatible AC outlet. • If the power supply AC LED goes on, the original AC outlet is faulty and cannot be used. Notify the appropriate facilities personnel and go to Step 6. • If the power supply AC LED remains off, go to Step 4.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Step 7 If a spare power supply is available, replace the existing module with the spare. If the DC LED then goes on, the power supply is working normally. Return the faulty power supply for replacement. If you are unable to resolve the problem or if you determine that either the power supply or power cable is faulty, contact a service representative for assistance.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems • Step 4 Step 5 Step 6 Turn off the PEM circuit breaker switch and check the DC power source: a. Check the DC power wires from the power source to the router. • Verify that the power wires are fastened securely at the PDU and the DC source. • Verify that the power wires are not worn or damaged. If the insulation appears cracked or broken, have the power wires replaced. b.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Step 7 If a spare PEM is available, replace the existing module with the spare. If the OUTPUT OK LED then goes on, the PEM is working normally. Return the faulty PEM for replacement. If you are unable to resolve the problem or if you determine that either the PEM or power wiring is faulty, contact a service representative for assistance.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems on. If both displays are off, the RP may not be properly seated in the backplane connector. There also might be a problem with the MBus module on the RP, or the system power supply might be off. • If both displays are on, check the message being displayed. As soon as the DC-DC converter is turned on by the MBus module, the processor on the RP begins the boot process. Status messages are displayed as the boot process continues.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Table 4-8 RP Alphanumeric LED Display Messages LED Display1 Indications2 LMEM TEST Low-memory test running LCAH INIT Lower 15k cache initialization BSS INIT Initialize main memory for ROM NVRAM INIT Initialize NVRAM EXPT INIT Initialize interrupt handlers TLB INIT Initialize TLB CACH INIT Initialize CPU data and instruction cache CACH PARY Enable CPU cache parity MEM INIT Initialize main memory NVRAM SIZE Si
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Troubleshooting the Line Cards Line cards can be installed in slots in the card cage. As each line card powers up, a power-on self-test (POST) is performed on the line card memory. A full set of field diagnostics can also be run on a line card from the system console, providing a pass/fail message both in the line card alphanumeric LED display and on the system console.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Table 4-9 Line Card Alphanumeric LED Display Messages (continued) LED Display1 Indications2 EXPT INIT Initialize interrupt handlers TLB INIT Initialize TLB CACH INIT Initialize CPU data and instruction cache MEM INIT Initialize main memory LROM RDY Ready to access download ROMI GET Getting ROM images FABL WAIT Wait for load of fabric downloader FABL DNLD The fabric downloader loads FABL STRT The fabric downloa
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Troubleshooting by Using the Alarm Cards The alarm cards are installed in the alarm card slots immediately beneath the clock and scheduler card slots.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems If there are no faults on the SFCs (SFC 0, SFC 1, or SFC 2), the green LED labeled ENABLED for each SFC should be on, and the yellow LED labeled FAIL for each SFC should be off. If the system detects an SFC fault, it turns off the green ENABLED LED for the faulty card, turns on the yellow FAIL LED, logs a warning message on the system console, and continues operating.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems Troubleshooting the Cooling Subsystem Cisco 12006 and Cisco 12406 Routers have a blower module located on the rear of the chassis, which provides cooling air for the router components. (See Figure 4-3.) The blower module receives power and signals though a connector recessed in the blower module. This connector mates with a connector mounted on the PDU. The blower module contains three fans, one connector, and one controller card.
Chapter 4 Troubleshooting the Installation Problem Solving with Subsystems • The following console monitor message indicates that the system has detected an overtemperature or out-of-tolerance power condition in the router: Queued messages: %ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown If an environmental shutdown results from an out-of-tolerance power condition, the output fail LED on the power module will go on before the system shuts down.