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Cisco uBR10012 Troubleshooting Manual

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Cisco uBR10012 Universal Broadband
Router Troubleshooting Guide
October 2004
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
Text Part Number: OL-1237-01

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  • Page 1 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide October 2004 Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Text Part Number: OL-1237-01...
  • Page 2 OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. CCVP, the Cisco Logo, and the Cisco Square Bridge logo are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn is a service mark of Cisco Systems, Inc.;...

  • Page 3: Table Of Contents

    AC PEM Faults DC PEM Faults 2400W AC-Input Power Shelf Other Electrical Problems Fan Assembly Module Faults Troubleshooting PRE-1 Modules C H A P T E R Information Required for Troubleshooting PRE-1 Modules Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 4 Troubleshooting the OC-12 Packet-Over-SONET Line Card 4-12 Troubleshooting the OC-12 Dynamic Packet Transport Spatial Reuse Protocol WAN Card 4-14 Troubleshooting the Cisco uBR10012 OC-48 DPT/POS Line Card 4-16 Troubleshooting the Gigabit Ethernet Line Card 4-18 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide...
  • Page 5 Testing with Digital Multimeters and Cable Testers Testing with TDRs and OTDRs Testing with TDRs Testing with OTDRs Testing with Breakout Boxes, Fox Boxes, and BERTs/BLERTs Testing with Network Monitors Testing with Network Analyzers N D E X Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 6 Contents Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 7 Obtaining Additional Publications and Information, page xi Purpose The Cisco uBR10012 router provides data and Voice over IP (VoIP) services to cable modems (CMs) and customer premises equipment (CPE) devices over a cable TV (CATV) network, supplying high-speed Internet and voice connectivity over the coaxial cable that provides TV and other signals.

  • Page 8: Preface

    Cisco uBR10012 Universal Broadband Router Hardware Installation Guide—Contains information • about the hardware of the Cisco uBR10012 router, how to install the router, connect its cables, and start the system up for the first time. See the following URL: http://www.cisco.com/univercd/cc/td/doc/product/cable/ubr10k/ubr10012/hig/index.htm...

  • Page 9: Obtaining Documentation

    Preface Obtaining Documentation For more information about the IOS software that runs on the Cisco uBR10012 router, see the Cisco IOS command reference books and configuration guides: Cisco Broadband Cable Command Reference Guide—Describes the cable specific commands used • on the Cisco uBR10012 router. See the following URL: http://www.cisco.com/univercd/cc/td/doc/product/cable/bbccmref/i ndex.htm...

  • Page 10: Obtaining Technical Assistance

    The Cisco TAC website is located at this URL: http://www.cisco.com/tac Accessing all the tools on the Cisco TAC website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL: http://tools.cisco.com/RPF/register/register.do...

  • Page 11: Tac Case Priority Definitions

    Obtaining Additional Publications and Information TAC Case Priority Definitions To ensure that all cases are reported in a standard format, Cisco has established case priority definitions. Priority 1 (P1)—Your network is “down” or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
  • Page 12 Preface Obtaining Additional Publications and Information Training—Cisco offers world-class networking training. Current offerings in network training are • listed at this URL: http://www.cisco.com/en/US/learning/index.html Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 13: Chapter 1 Basic Troubleshooting Tasks And Startup Issues

    Cisco uBR10012 System Startup Sequence, page 1-5 Basic Troubleshooting Checklist If you encounter a problem after you install the Cisco uBR10012 router, go through the following troubleshooting checklist to check for the most common error conditions before you contact the Cisco...

  • Page 14: Confirming The Hardware Installation

    If the problem persists, consult the Cisco uBR10012 release notes to confirm that this is not an existing problem. Finally, you should consider replacing the component.

  • Page 15: Displaying The Cisco Ios Software Version

    Displaying the Cisco IOS Software Version Use the show version command to confirm that the router is running the proper version of Cisco IOS software and has a sufficient amount of system memory. The command also reports the system uptime and the method by which the system was powered up.

  • Page 16: Displaying System Environment Information

    Cisco uBR10012 router to allow the passage of IP traffic. At each main point of the flowchart, there are pointers to the chapters in this guide that describe how to troubleshoot individual pieces of hardware.

  • Page 17: Cisco Ubr10012 System Startup Sequence

    LEDs on and restart Obtain technical System assistance startup successful Cisco uBR10012 System Startup Sequence Table 1-1 describes the visible sequence of events that occur during a typical Cisco uBR10012 power up. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 18 IOS STBY appears on the alphanumeric display of the standby PRE-1 module. If the boot process fails, no console access is available. If you cannot boot the Cisco uBR10012 router, call Cisco TAC. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 19: Chapter 2 Pem Faults And Fan Assembly Failures

    • AC PEM Faults On the Cisco uBR10012 router, two AC PEMs are installed in a redundant configuration, which allows one AC PEM to fail without affecting system operations. A single PEM can power the router for sufficient time to request and install a new PEM to replace the one that failed.

  • Page 20: Chapter 2 Pem Fault And Fan Assembly Failure

    Power Green The PEM is on, is receiving power from the AC power source, and is providing power to the Cisco uBR10012 chassis (normal operations). Fault Yellow Indicates that AC-input power is being received by the PEM, but that the PEM is not supplying power to the chassis, typically because the PEM’s power switch is...

  • Page 21: Dc Pem Faults

    DC PEM Faults On the Cisco uBR10012 router, two DC PEMs are in a redundant configuration, which allows one DC PEM to fail without affecting system operations. A single PEM can usually power the router for sufficient time to request and install a new PEM to replace the one that failed.

  • Page 22: Dc Pem Faults

    PEM Faults and Fan Assembly Failures DC PEM Faults Figure 2-2 DC PEM Front Panel (original model, UBR10-PWR-DC) POWER MISWIRE FAULT Figure 2-3 DC PEM Front Panel (current model with alarm connector, UBR10-PWR-DC-M) POWER MISWIRE FAULT Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 23: 2400W Ac-Input Power Shelf

    The 2400W AC-input power shelf converts AC-output power from an external AC power source into DC power that is suitable for powering the Cisco uBR10012 router. The power shelf supplies –54 VDC output power to the two DC PEMs in the Cisco uBR10012 chassis.

  • Page 24: Other Electrical Problems

    2400W AC-input power shelf. Two 1200W AC-input power modules are capable of powering a fully configured Cisco uBR10012 router. The third power module provides full redundancy. During normal operation, the three AC-input power modules provide automatic load-sharing with each power module supporting 33 percent of the power load.

  • Page 25: Fan Assembly Module Faults

    Fan Assembly Module Faults The fan assembly module is critical to the operation of the Cisco uBR10012 router because it allows the router to maintain proper operating temperatures. Severe overheating can result in system failure, so a fan assembly module must always be present in the chassis while the router is operating.
  • Page 26 F A U L T AL AR MS AL AR MS The LEDs on the front panel indicate the current status of the fans. Table 2-6 lists the fan assembly module fault indications and recommended actions. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 27 Check the air filter, and, if necessary, clean or replace it. Reduce the ambient temperature of the area surrounding the Cisco uBR10012 chassis. This can be done using air conditioning, using fans to circulate the air in the room, and closing the blinds on any windows that are facing the sun.
  • Page 28 Chapter 2 PEM Faults and Fan Assembly Failures Fan Assembly Module Faults Cisco uBR10012 Universal Broadband Router Troubleshooting Guide 2-10 OL-1237-01...

  • Page 29: Information Required For Troubleshooting Pre-1 Modules

    Step 3 Capture the complete bootup sequence, especially if the router is reporting errors at bootup. If the router is unresponsive, or if it refuses to boot to the Cisco IOS prompt, reboot the router to the Step 4 ROMMON prompt and capture a stack trace, using the stack ROMMON command. For more...

  • Page 30: Pre Module Not Supported

    The Cisco uBR10012 router supports only the PRE-1 module in Cisco IOS Release 12.2(8)BC1, and later releases. If you attempt to boot the Cisco uBR10012 router with a PRE module with one of these software releases, the router prints the following error message and falls through to the ROM monitor: %%Error: PRE not supported with this image rommon>...

  • Page 31: C H A P T E R 3 Troubleshooting Pre-1 Modules

    Typically, the PRE-1 module in slot A (the left-most PRE-1 module slot as you face the chassis) boots the Cisco IOS software more quickly than the PRE-1 module in slot B (the PRE-1 slot on the right). This is because the PRE-1 module in slot B adds a slight delay in its bootup sequence, so as to allow the module in slot A to boot first.

  • Page 32: Pre-1 Module Faults

    B PRE-1 module to boot first. PRE-1 Module Faults The PRE-1 module provides the IP routing and forwarding functionality in the Cisco uBR10012 router. Thus, in a non-redundant PRE-1 configuration, a PRE-1 failure is a system failure. A redundant PRE-1 configuration is recommended because it allows the redundant PRE-1 module to automatically assume full functionality upon failure of the primary PRE-1 module.
  • Page 33 If the problem persists, contact Cisco TAC. FAIL LED is yellow, indicating that Reinsert the PRE-1 module. the PRE-1 failed Replace the module with a new PRE-1 module. If the problem persists, contact Cisco TAC. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 34: Ethernet Connection Problems

    At the switch prompt, enter show interface fastethernet0/0/0. If the port is administratively down, enter Step 1 these commands to enable it: c10000# configure terminal Enter configuration commands, one per line. End with CNTL/Z. c10000(config)#interface fastethernet0/0/0 c10000(config-if)# no shut c10000(config-if)# exit c10000(config)# exit c10000# Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 35: Console Port Serial Connection Problems

    “Obtaining Technical Assistance” section on page x instructions on contacting the Cisco TAC. Console Port Serial Connection Problems If the console screen connected to a Cisco uBR10012 console port appears frozen or fails to work properly, check the following steps: Refer to the “Cisco uBR10012 System Startup Sequence”...

  • Page 36: Troubleshooting Common System Problems

    EXEC mode command in global configuration mode. If the cable, connections, power, and terminal settings all check out and you still cannot connect to the console port on the module, replace the module in question. If the problem persists, contact the Cisco TAC for further assistance.

  • Page 37: High Cpu Utilization Problems

    Problems with Access Lists, page 3-13 • SNMP Traffic, page 3-13 • Also see the document Troubleshooting High CPU Utilization on Cisco Routers, which is at the following URL: http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml ARP Traffic High volumes of Address Resolution Protocol (ARP) requests and responses can occupy a significant portion of the CPU time, because the router cannot use fast-switching to process ARP packets, but must instead forward them to the route processor (RP).

  • Page 38: Step 1

    Troubleshooting PRE-1 Modules Troubleshooting Common System Problems In addition, the Cisco CMTS router automatically monitors ARP traffic and enters the IP addresses found in ARP requests into its own ARP table, in the expectation that a device will eventually be found with that IP address.

  • Page 39: Debug And System Messages

    Router# Exec and Virtual Exec Processes The Exec process is the Cisco IOS process that handles the TTY serial lines (console, auxiliary, asynchronous), and the Virtual Exec process handles the Virtual TTY (VTY) Telnet sessions. These processes run as mid-level processes, so if either one is exceptionally busy, it could generate a high CPU usage level.

  • Page 40: Interrupts Are Consuming A Large Amount Of Resources

    Router(config)# IP Input Processing The Cisco IOS software uses a process named IP input to process IP packets that cannot be processed using the fast-switching process. If the router is process-switching a lot of IP traffic, it could result in excessively high CPU usage.

  • Page 41: Problems With Access Lists

    For more information on access lists, see the Configuring IP Services chapter in the IP Addressing and Services section of the Cisco IOS IP Configuration Guide, Release 12.2, at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfip.htm If you are using Ciscoworks to manage your network, consider using the...
  • Page 42 If necessary, upgrade the router to the latest version of software. To further troubleshoot the problem, registered users on Cisco.com can also decode the output of Step 6 multiple show commands by using the Output Interpreter tool, which is at the following URL: https://www.cisco.com/cgi-bin/Support/OutputInterpreter/home.pl...

  • Page 43: Memory Problems

    Alignment Errors, and Spurious Interrupts, at the following URL: http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_tech_note09186a00800a65d1.sht Correctable Alignment Errors The Cisco IOS software can automatically correct most alignment errors. When it does so, the router generates a system error message similar to the following: %ALIGN-3-CORRECT: Alignment correction made at 0x60262478 reading/writing 0x60A9FF5C Occasional alignment errors do not necessarily require operator intervention, because the Cisco IOS software can correct these errors and continue with normal operations.

  • Page 44: Low Memory Errors

    Image text-base: 0x60008968, data-base: 0x61B80000 ROM: System Bootstrap, Version 12.0(9r)SL2, RELEASE SOFTWARE (fc1) BOOTLDR: 10000 Software (C10K-EBOOT-M), Version 12.0(17)ST, EARLY DEPLOYMENT RE) ubr10k uptime is 6 days, 18 hours, 59 minutes Cisco uBR10012 Universal Broadband Router Troubleshooting Guide 3-16 OL-1237-01...

  • Page 45: Particle Pool Fallbacks

    Private particle pools are buffers in I/O memory that store packets while they are being processed. The Cisco IOS software allocates a fixed number of private particle pools during system initialization, and these buffers are reserved for packet use, so as to minimize system contention for memory resources.

  • Page 46: Spurious Interrupts

    The Fast Ethernet interfaces on the processor card could be heavily loaded. • The Cisco IOS software has a memory leak that is not releasing the memory in the private particle • pool after the interface has finished processing a packet.

  • Page 47: Spurious Memory Accesses

    Segment Violation (SegV) error. In either case, the cause of the error is almost always a bug in the Cisco IOS software. If possible, upgrade to the latest release of the Cisco IOS software. If the bug still exists on the router, see the section Spurious Accesses in the document Troubleshooting Spurious Accesses, Alignment Errors, and Spurious Interrupts, at the following URL: http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_tech_note09186a00800a65d1.sht...
  • Page 48 Chapter 3 Troubleshooting PRE-1 Modules Troubleshooting Common System Problems Cisco uBR10012 Universal Broadband Router Troubleshooting Guide 3-20 OL-1237-01...

  • Page 49: Troubleshooting Line Cards

    C H A P T E R Troubleshooting Line Cards This chapter discusses troubleshooting faults on the following Cisco uBR10012 line cards: General Information for Troubleshooting Line Card Crashes, page 4-2 • Troubleshooting the Timing, Communication, and Control Plus Card, page 4-8 •...

  • Page 50: General Information For Troubleshooting Line Card Crashes

    Slot 2/1: 0 crashes Slot 3/0: 0 crashes Slot 3/1: 0 crashes Slot 4/0: 1 crashes 1 - crash at 04:28:56 EDT Tue Apr 20 1999 Slot 4/1: 0 crashes Slot 5/0: 0 crashes Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 51 Abort due to Break Point or an arithmetic exception SIGFPE Floating point unit (FPU) exception SIGKILL Reserved exception SIGBUS Bus error exception SIGSEGV SegV exception SIGCACHE Cache parity exception SIGWBERR Write bus error interrupt Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 52: Cache Parity Errors

    • If the line card crashed for some other reason, capture the output of the show tech-support command. Registered Cisco.com users can decode the output of this command by using the Output Interpreter tool, which is at the following URL: https://www.cisco.com/cgi-bin/Support/OutputInterpreter/home.pl...

  • Page 53: Bus Errors

    Capture the output of the show stacks, show context, and show tech-support commands. Registered Step 1 Cisco.com users can decode the output of this command by using the Output Interpreter tool, which is at the following URL: https://www.cisco.com/cgi-bin/Support/OutputInterpreter/home.pl...

  • Page 54: Software-Forced Crashes

    Upgrading to the latest version of the Cisco IOS software eliminates all fixed bugs that can cause line card bus errors. If the crash is still present after the upgrade, collect the relevant information from the above troubleshooting, as well as any information about recent network changes, and contact Cisco TAC.
  • Page 55 – – Try moving the card to another slot, if one is available. If software-forced crashes continue, collect the following information and contact Cisco TAC: All relevant information about the problem that you have available, including any troubleshooting • you have performed.

  • Page 56: Troubleshooting The Timing, Communication, And Control Plus Card

    Positioning System (GPS) or BITS clock. If the Cisco uBR10012 router does not have a working TCC+ card installed, the WAN and cable interface line cards will experience excessive packet drops, or all traffic will be dropped, because of an invalid timing signal.
  • Page 57 Is the STATUS LED on the primary TCC+ card on (green) to indicate that it is the primary card? Is the STATUS LED on the secondary TCC+ card flashing (green) to indicate that it is the redundant card? Table 4-4 to continue troubleshooting the TCC+ cards. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 58 12.2(11)BC2 or later release. The console displays the following error message: The Cisco uBR10012 router detected that the TCC+ card in the indicated slot was faulty. If a redundant card is installed, the system passed control %UBR10KTCC-1-BADTCC: TCCplus card in to it.
  • Page 59 TCC+ this error can be ignored, because the system typically records a cards installed in the Cisco uBR10012 router. slight delay when the TCC+ cards synchronize with each other. These initial compare errors can be ignored and cleared with the cable clock clear-counters command.

  • Page 60: Troubleshooting The Oc-12 Packet-Over-Sonet Line Card

    Troubleshooting the OC-12 Packet-Over-SONET Line Card Troubleshooting the OC-12 Packet-Over-SONET Line Card Figure 4-2 describes the LEDs on the Cisco uBR10-1OC12/P-SMI OC-12 Packet-Over-SONET (POS) line card faceplate. Use these descriptions to verify the operation of the OC-12 POS line card. Figure 4-2...
  • Page 61 Try inserting the line card in a different slot. Card seems to be passing traffic (Tx/Rx lights), but If the card works in a different slot, the Cisco uBR10012 cannot communicate with the PRE backplane may be defective. Contact the Cisco TAC.

  • Page 62: Troubleshooting The Oc-12 Dynamic Packet Transport Spatial Reuse Protocol Wan Card

    Green Indicates that the CPU has successfully completed the boot, self test, and code download process, and that the Cisco uBR10-SRP- OC12SML DPT WAN line card is the active card. MAINTENANCE Normally off. Indicates that no maintenance action is required.

  • Page 63: Troubleshooting The Oc-12 Dynamic Packet Transport Spatial Reuse Protocol Wan Card, Page

    Chapter 4 Troubleshooting Line Cards Troubleshooting the OC-12 Dynamic Packet Transport Spatial Reuse Protocol WAN Card Table 4-6 Cisco uBR10-SRP-OC12SML DPT WAN Line Card LEDs (continued) Status Description RX PKTS (Packets) Blinking Indicates that the DPT port line has received a packet. This Green LED flickers in normal operation, indicating traffic.

  • Page 64: Troubleshooting The Cisco Ubr10012 Oc-48 Dpt/Pos Line Card

    Chapter 4 Troubleshooting Line Cards Troubleshooting the Cisco uBR10012 OC-48 DPT/POS Line Card Troubleshooting the Cisco uBR10012 OC-48 DPT/POS Line Card The Cisco OC-48 DPT⁄ POS interface module has a pair of OC-48c, fiber-optic standard connector (SC) duplex ports that provide an SC connection for either the single-mode short-reach or single-mode long-reach version.
  • Page 65 Chapter 4 Troubleshooting Line Cards Troubleshooting the Cisco uBR10012 OC-48 DPT/POS Line Card Table 4-7 Cisco OC-48 DPT LED Status and Description Status Description SYNC Green Card synchronized to mate card Card not synchronized WRAP Yellow Interface is wrapped Interface not wrapped...

  • Page 66: Troubleshooting The Gigabit Ethernet Line Card

    LEDs on the Cisco uBR10-1GE Gigabit Ethernet line card faceplate to help you verify correct operation. Make sure that the gigabit Ethernet Interface Converter (GBIC) type on the Cisco uBR10012 router matches the GBIC type at the other end of the fiber optic cable.
  • Page 67 Replace the GBIC. Gigabit Ethernet card resets itself intermittently. Issue the show diag command. If this indicates a “parity error” occurred, contact Cisco TAC for possible replacement of the card. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide 4-19 OL-1237-01...
  • Page 68 Chapter 4 Troubleshooting Line Cards Troubleshooting the Gigabit Ethernet Line Card Cisco uBR10012 Universal Broadband Router Troubleshooting Guide 4-20 OL-1237-01...

  • Page 69: Chapter 5 Replacing Or Recovering Passwords

    This section describes how to recover a lost enable or console login password, and how to replace a lost enable secret password on the Cisco uBR10012 router. It is possible to recover the enable or console login password. The enable secret password is encrypted, Note however, and must be replaced with a new enable secret password.
  • Page 70 If there is no enable secret password, note the enable and console login passwords. If the enable and console login passwords are not encrypted, go to Step Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 71 Enter the copy running-config startup-config command to save the new configuration to NVRAM. Step 18 Enter the reload command to reboot the router. Step 19 Log in to the router using the new or recovered passwords. Step 20 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...
  • Page 72 Chapter 5 Replacing or Recovering Passwords Password Recovery Procedure Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 73: Appendix

    Cisco strongly advises against using unsupported Cisco IOS commands, even if described, because such Warning commands can have undesirable effects upon the performance of the Cisco CMTS. In particular, Cisco advises against using any unsupported commands that pertain to service-policy or to Modular Quality of Service command-line interface (MQC) while Parallel Express Forwarding (PXF) is running on the Cisco CMTS.

  • Page 74: Hccp Commands

    • • show frame-relay ip [rtp | tcp] header-compression [interface] HCCP Commands The following commands are supported in Cisco IOS Release 12.2(8)BC2 and later 12.2 BC releases. These commands are not supported in previous releases. • hccp authenticate hccp authenticate key-chain •...

  • Page 75: Unsupported Mpls Vpn Commands

    [novell-ether | arpa | sap | snap] • ppp reliable-link Spectrum Management Commands The following commands are supported in Cisco IOS Release 12.2(8)BC2 and later 12.2 BC releases. These commands are not supported in previous releases. cable upstream hop-priority •...
  • Page 76 • cable telco-return spd radius-realm • cable telco-return spd service-provider • cable telco-return spd threshold • cable telco-return spd username • debug cable telco-return • • debug telco-return msg Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 77: Appendix

    A P P E N D I X Recommended Tools and Test Equipment Table B-1 lists the basic tools and test equipment necessary to perform general maintenance and troubleshooting tasks on the Cisco uBR10012 router. Table B-1 Recommended Tools and Test Equipment Equipment...

  • Page 78: Testing With Tdrs And Otdrs

    An OTDR can be used to identify the “signature” of a particular installation, noting attenuation and splice losses. This baseline measurement can then be compared with future signatures if you suspect a problem in the system. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 79: Testing With Breakout Boxes, Fox Boxes, And Berts/Blerts

    This data can be used to: Create profiles of LAN traffic • Locate traffic overloads • Plan for network expansion • Detect intruders • Establish baseline performance • • Distribute traffic more efficiently Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 80: Testing With Network Analyzers

    Incorporate an “expert” system in which the analyzer uses a set of rules, combined with information • about the network configuration and operation, to diagnose and solve, or offer potential solutions to, network problems. Cisco uBR10012 Universal Broadband Router Troubleshooting Guide OL-1237-01...

  • Page 81: I N D E X

    3-13 line cards electrical problems see also PEM faults cable arp command 3-10 ENABLE LED cable clock clear-counters command 4-11 OC-48 DPT/POS 4-16 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-1 OL-1237-01...
  • Page 82 4-12 PASS THRU, OC-48 DPT/POS 4-17 PEM fault hard parity errors 3-17 POS, OC-48 DPT/POS 4-16 hardware Power verifying POWER, OC-12 DPT/SRP 4-14 HCCP commands POWER, TCC+ hw-module reset command 4-10 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-2 OL-1237-01...
  • Page 83 4-17 TCC+ password recovery management Ethernet PEM faults memory cache parity errors POS LED parity errors 3-16 OC-48 DPT/POS 4-16 problems 3-15 power cables spurious accesses 3-19 POWER LED MLPPP commands Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-3 OL-1237-01...
  • Page 84 OC-48 DPT/POS 4-16 STATUS LED 4-14 RX PKTS LED 4-14 TCC+ SYNC LED OC-48 DPT/POS 4-17 system exception errors scheduler allocate command 3-12 system messages 3-11 show commands Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-4 OL-1237-01...
  • Page 85 IP input processing 3-12 line cards low memory errors 3-16 memory parity errors 3-16 memory problems 3-15 OC-12 DPT/SRP 4-14 OC-12 POS 4-12 OC-48 DPT/POS 4-16 particle pool fallbacks 3-17 processes 3-11 Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-5 OL-1237-01...
  • Page 86 Index Cisco uBR10012 Universal Broadband Router Troubleshooting Guide IN-6 OL-1237-01...

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