Motorola BSR 64000 Guide de dépannage

BSR Troubleshooting Guide

BSR Troubleshooting Guidex• BSR 1000 Configuration and Management GuideThis document provides the instructions and procedures for configuring and mana

BSR Troubleshooting Guide6-100Misconfigured Route FilteringIf route filtering is misconfigured, it prevents a RIP router from receiving routing table

Troubleshooting RIP6-101Split Horizon is DisabledIf routing loops are occurring between neighboring RIP routers or the size of routing updates to rout

BSR Troubleshooting Guide6-102Follow these steps to ensure that the correct version of RIP is running on the BSR:1. To determine which version of RIP

Troubleshooting RIP6-103Table 6-2 lists the available command options.5. To verify that the correct version of RIP is configured on the BSR, use the s

BSR Troubleshooting Guide6-104interface number refers to the ethernet interface number.4. To change the version of RIP received over the specified int

Troubleshooting RIP6-105Table 6-4 lists the available command options.6. To verify that the correct version of RIP is configured on the specified inte

7Troubleshooting OSPF

Troubleshooting OSPF7-109IntroductionThis chapter provides troubleshooting solutions to some common Open Shortest Path First (OSPF) routing protocol p

Prefacexi• BSR 64000 SNMP MIB Reference GuideThis document describes the Simple Network Management Protocol (SNMP) MIBs; provides information that des

BSR Troubleshooting Guide7-110Handling Router Neighbor MisconfigurationsThe following sections explain why OSPF routers may not exchange information t

Troubleshooting OSPF7-1115. Check other OSPF routers on the network by repeating steps 1 to 4. Make sure that OSPF is configured properly on all neigh

BSR Troubleshooting Guide7-1124. Use the debug ip ospf adj command in Privileged EXEC mode. Check the output for mismatched values, as shown in the fo

Troubleshooting OSPF7-1134. Look in the show ip interface command output for a message for a specific interface that is similar to the one in the foll

BSR Troubleshooting Guide7-114The following sections describe how to resolve missing OSPF routes in a routing table:• RIP Routing Information Incorrec

Troubleshooting OSPF7-115ABR Configured Without Area 0 InterfaceIf there are two or more OSPF networks, both should be configured with a different are

BSR Troubleshooting Guide7-1163. To configure an ABR if one does not exist in an area, use the network command in Router Configuration mode. For examp

8Troubleshooting BGP

Troubleshooting BGP8-119IntroductionThis chapter provides troubleshooting solutions to some common Border Gateway Protocol (BGP) routing protocol prob

BSR Troubleshooting GuidexiiNotes, Cautions, WarningsThe following icons and associated text may appear in this document.screen display Wed May 6 17:0

BSR Troubleshooting Guide8-120Misconfigured Access ListFollow these steps to resolve access list configuration problems:1. Use the show access-list co

Troubleshooting BGP8-121Missing Network Destination AdvertisementWhen BGP routers do not advertise routes, routing updates from those routers do not c

BSR Troubleshooting Guide8-122RDN(config-bgp)#neighbor{ip-address | peer-group-name} remote-as numberwhere:ip-address is the IP address of the neighbo

Troubleshooting BGP8-1236. To view route entries in the route table (also known as the forwarding table), use the show ip route command in Privileged

9Troubleshooting SONET

Troubleshooting SONET9-127IntroductionThis chapter describes how to troubleshoot the Packet Over SONET (POS) access module. When SONET network problem

BSR Troubleshooting Guide9-1284. If LEDs on the POS module are green but you suspect that the module is has transmission problems on a port (causing a

Troubleshooting SONET9-129LOF DeterminationThe SONET port may not operate if a Loss of Frame (LOF) condition occurs. LOF conditions occur when there i

PrefacexiiiContacting SupportUse the following information to contact Support:U.S. 1-888-944-HELP1-888-944-4357International +.215-323-0044WWW http://

BSR Troubleshooting Guide9-1303. Check for signal degradation.4. Check fiber optic connectors are broken or unclean.5. Check the fiber cabling for dam

Troubleshooting SONET9-1316. Check for a Path Remote Error Indication (P-REI) failure by viewing the Active Defect field in the show controllers pos c

BSR Troubleshooting Guide9-1321. Check for bent pins on the backplane.2. If there are no bent pins, replace the POS module with a new POS module, or t

Troubleshooting SONET9-1334. Use the information in Table 9-1 to troubleshoot b1-tca, b2-tca, and b3-tca information that indicates where the data los

BSR Troubleshooting Guide9-134Data Loss ResolutionOnce you isolate a specific SONET section, line, or path, follow these steps to resolve the problem:

ACable ModemRegistration Process

Cable Modem Registration ProcessA-137IntroductionThis appendix describes the cable modem registration process. A cable modem goes through a standard r

BSR Troubleshooting GuideA-138• Station Maintenance ranging uses periodic time intervals to send a unicast message containing a registered SID between

Cable Modem Registration ProcessA-139• Cable modem Subnet Mask.• TFTP server IP address used to connect to the TFTP server.• Download Configuration fi

BSR Troubleshooting GuideA-140Baseline PrivacyBaseline Privacy encrypts upstream and downstream data passed between the cable modem and CMTS using the

Cable Modem Registration ProcessA-141Data ExchangeCable modems use the dedicated data intervals in the current upstream MAPs to transmit data to the C

Index-1Aaccess lists, 89 to 91BGP, 120RIP, 100active alarm field, 127amplifier noise, 67application errors, 91area border router (ABR)see OSPFaudible

Index-2BSR Troubleshooting GuideHH1/H2 pointer bytes, 130Iingress noise, 56, 65electrical, 56impulse, 56input power-level range, 62interleave depthset

Index-3POSfail LED, 131 to 132LOF LED, 129LOP LED, 130LOS LED, 127power leveldownstream, 66PPP, 94P-REI, 131provisioning problems, 74QQAM, 59, 6016 QA

1Introduction

Introduction1-17IntroductionThis chapter identifies the basic tasks you perform to solve problems with the network and hardware and software configura

BSR Troubleshooting Guide1-184. Document the changes and effects of changes as you perform troubleshooting procedures, and note any new troubleshootin

Introduction1-19• Record any changes that occurred since the last time the BSR was operating properly. Investigate any configuration changes that migh

NoticeCopyright © 2001Motorola, Inc.All rights reservedNo part of this publication my be reproduced in any form or by any means or used to make and a

BSR Troubleshooting Guide1-20Solving the ProblemDifferent problems require different actions and solutions, but follow these basic steps to fix any pr

2Checking PhysicalEquipment

Checking Physical Equipment2-23IntroductionThis chapter discusses how to check physical connections and observe LEDs on the BSR products. You should c

BSR Troubleshooting Guide2-24Checking Physical Network ConnectionsCheck network connections for loose, broken, or disconnected cables. Inspect the cab

Checking Physical Equipment2-252. Observe the LEDs on the SRM on the BSR 64000 or the front panel of the BSR 1000 to determine if there is a fail cond

BSR Troubleshooting Guide2-26Table 2-1 describes the possible display states of these LEDs during operation.Fan Status LEDsThe SRM provides a set of F

Checking Physical Equipment2-27Alarm LEDsTable 2-3 describes the BSR 64000 Alarm LEDs on the SRM. The SRM provides a set of three Alarm LEDs. These LE

BSR Troubleshooting Guide2-28DOCSIS CMTS Resource Module LEDsThe DOCSIS CMTS Module has two groups of LEDs that indicate its operational status:• Modu

Checking Physical Equipment2-29Port LEDs are grouped vertically. A number to the right each LED group indicates the channel number associated with the

iiiContentsPrefaceScope ixAudience ixDocumentation Set ixBSR 1000™ Documentation Set ixBSR 1000™ Documentation Set xConventions xiNotes, Cautions, War

BSR Troubleshooting Guide2-30Table Table 2-4 describes the possible display states of these LEDs during operation.Per-Port LEDsThe OC3/OC12 POS Resour

Checking Physical Equipment2-31Port LEDs are grouped vertically. A number to the right each LED group indicates the port number associated with the gr

BSR Troubleshooting Guide2-32Table 2-8 describes the possible display states of these LEDs during operation.Upstream and Downstream Port LEDsThe BSR 1

Checking Physical Equipment2-33Port LEDs are grouped vertically. A number above each LED group indicates the channel number associated with the group.

3Monitoring SNMP

Monitoring SNMP3-37IntroductionThis chapter describes how to use Simple Network Management Protocol (SNMP) information to monitor BSR system managemen

BSR Troubleshooting Guide3-38• Illegal operations for community names suppliedDisplays command operations that are not allowed for the existing commun

4Troubleshooting the CMTS

BSR Troubleshooting GuideivChecking BSR 1000 Power Connections 23Checking BSR 64000 Power Connections 23Checking Physical Network Connections 24Interp

Troubleshooting the CMTS4-41IntroductionThis chapter provides troubleshooting solutions to some common Data Over Cable Service Interface Specification

BSR Troubleshooting Guide4-42• The CM upstream transmit power changes beyond the configured power adjust threshold.Follow these steps to view flap lis

Troubleshooting the CMTS4-43The following output displays:Figure 4-3 show cable flap-list sort-time Command Output4. To sort the flap list statistics

BSR Troubleshooting Guide4-44Interpreting Flap List StatisticsThis section describes how to interpret flap list statistics in order to troubleshoot th

Troubleshooting the CMTS4-45Initial maintenance @ Time T1 Station maintenance Init maintenance @ Time T2 The Ins and Flap counters in the flap list ar

BSR Troubleshooting Guide4-46A CM has roughly the same number of hits and misses and contain a lot of insertions.There is a problematic downstream pat

Troubleshooting the CMTS4-47High P-Adj (power adjustment) This condition can indicate that the fiber node is clipping the upstream return laser. Evalu

BSR Troubleshooting Guide4-48Table 4-3 describes how to interpret flap list statistics:Table 4-3 Flap List Statistic InterpretationsField DescriptionH

Troubleshooting the CMTS4-49Tips for Administrating Flap ListsFollow these suggestions for administrating flap lists:• Write script(s) to periodically

ContentsvBad Upstream Signal-to-noise Ratio Detected 58Upstream Power Level Too Low or High 61Resolving Problems on the Downstream Path 63Bad Downstre

BSR Troubleshooting Guide4-50• Save the flap list statistics to a database server at least once a day to keep a record of flap list statistics which i

Troubleshooting the CMTS4-515. Do the following tasks to repair damaged contacts:• Ensure that contacts are made of similar metals.• Ensure that conta

BSR Troubleshooting Guide4-52where:port is the number of the upstream port4. To determine if modulation profile parameters are adequate for the upstre

Troubleshooting the CMTS4-53If a new upstream modulation profile needs to be created, refer to the Configuring and Managing the BSR 64000 and Configur

BSR Troubleshooting Guide4-547. To find the signal quality information for an upstream port on the BSR 1000, use a MIB browser to access the DocsIfSig

Troubleshooting the CMTS4-558. View the signal quality statistics for the upstream interface. If there is a high number of unerroreds (uncorrupted pac

BSR Troubleshooting Guide4-561. Check for bad optical amplifiers in the HFC network.2. Check for defective equipment in the HFC network.3. Determine i

Troubleshooting the CMTS4-57Too Many CPE Hosts on Subscriber CMWhen too many Customer Premises Equipment (CPE) hosts, such as PCs, servers, and applia

BSR Troubleshooting Guide4-58Resolving Problems on the Upstream PathWhen the upstream port fault LED is red, the upstream port is not operating and is

Troubleshooting the CMTS4-59interface is the number of the cable interfaceport is the number of the upstream port2. To view the modulation profile for

BSR Troubleshooting GuideviMisconfigured or Missing Network Router Table Entries 99Misconfigured Route Filtering 100Split Horizon is Disabled 101Handl

BSR Troubleshooting Guide4-605. View the show cable interface signal-quality statistics for the specific upstream interface. If there is a high number

Troubleshooting the CMTS4-611. Inspect optical amplifiers in the HFC network to make sure they are working properly.2. Make sure all HFC network equip

BSR Troubleshooting Guide4-62This section also describes how to configure the upstream input power level when problems occur. The upstream input power

Troubleshooting the CMTS4-633. Inspect amplifiers if there is an attenuation problem on the upstream path. View CMs that proceed or follow an amplifie

BSR Troubleshooting Guide4-64• Bad Downstream Signal-to-Noise Ratio Detected• Downstream Power Level Too Low or HighBad Downstream Signal-to-Noise Rat

Troubleshooting the CMTS4-65• A high number of corrected packets and uncorrected, dropped packets occurs when the signal-to-noise ratio is approximate

BSR Troubleshooting Guide4-661. Check all downstream passive equipment (such as combiners, couplers, and attenuators) and cabling for flaws. The downs

Troubleshooting the CMTS4-674. Inspect amplifiers if there is an attenuation problem on the downstream path. View CMs that proceed or follow an amplif

BSR Troubleshooting Guide4-682. To verify that CM authentication is deactivated, use the show running-config command in Privileged EXEC mode and view

Troubleshooting the CMTS4-69“authentication string” is an alpha-numeric text string specified in double quotes0xkey is a key specified in hexadecimal

ContentsviiLOP Resolution 131Failed POS Module 131Fail LED Blinks and Lights Repeatedly 131Handling Data Loss on SONET Link 132Data Loss Determination

BSR Troubleshooting Guide4-70slot is the slot number of the DOCSIS module on the BSR 64000interface is the number of the cable interfacen is the SID n

Troubleshooting the CMTS4-711. To ping a specific CM IP address or hostname to determine if the CM is online, use the ping command in Privileged EXEC

BSR Troubleshooting Guide4-72MAC-address is the MAC level address of the CM.ip-address is the IP level address of the CM.5. If all CMs are unable to o

Troubleshooting the CMTS4-733. If the CM has an IP address and must be reset, use the clear cable modem reset command in Privileged EXEC mode as shown

BSR Troubleshooting Guide4-74Provisioning Problems Cause CMs Not to RegisterIt is important to understand the basic communication process between the

Troubleshooting the CMTS4-755. If the cable interface is receiving a DHCP discover message from the CM, determine if the cable interface is forwarding

BSR Troubleshooting Guide4-767. If there is no communication between the TFTP server and the cable interface, the CM does not have an IP address. Dete

Troubleshooting the CMTS4-7710. To reset all CMs so that they can obtain an IP address, use the clear cable modem all reset command in Privileged EXEC

BSR Troubleshooting Guide4-78

5Troubleshooting TCP/IP

Troubleshooting TCP/IP5-81IntroductionThis chapter provides troubleshooting solutions to some common TCP/IP internetwork problems:• Resolving Host Con

BSR Troubleshooting Guide5-82Follow these steps to configure a default gateway for a local or remote host:1. To determine whether the local and remote

Troubleshooting TCP/IP5-832. The default route entry should specify the router that has the route to the remote host. If there is no default route ent

BSR Troubleshooting Guide5-84DNS Not RunningIf issuing the host command at the UNIX prompt returns a Host not found message, but you are able to open

Troubleshooting TCP/IP5-852. Once you isolate a problem router, determine whether routing is enabled on the BSR. To view the routing table, enter the

BSR Troubleshooting Guide5-866. To enable the proper routing protocol on the router interface, use the router command in Global Configuration mode, as

Troubleshooting TCP/IP5-874. To view a specific router configuration, use the show running-config command in Privileged EXEC mode.5. Try to ping anoth

BSR Troubleshooting Guide5-88interface number refers to the ethernet or POS interface number.RDN(config-if)#no shutdown3. To discover if the router in

Troubleshooting TCP/IP5-89Handling a Misconfigured Access ListAccess lists are used to filter IP packets so that certain IP packets are denied or perm

ixPrefaceScopeThis document describes how to troubleshoot the Motorola™ Broadband Services Router™ 64000 (BSR 64000™) and Motorola™ Broadband Services

BSR Troubleshooting Guide5-90RDN(config-if)#no ip access-group <group number> access-list [extended | standard] <list number>where:group n

Troubleshooting TCP/IP5-919. If packets pass normally, perform steps 1 to 7 on any other routers in the path until all access lists are enabled and pa

BSR Troubleshooting Guide5-927. If you altered an access list, enable the list to see whether the application can still operate normally.8. If the app

Troubleshooting TCP/IP5-934. Look for an ip helper-address command entry for that router interface. Make sure that the specified address is correct (i

BSR Troubleshooting Guide5-94Resolving PPP Link Over SONET FailuresThis section discusses how to troubleshoot a problem Point to Point Protocol (PPP)

Troubleshooting TCP/IP5-956. To determine if there is no network activity at the IP layer between the local and remote devices, use the debug ppp ipcp

BSR Troubleshooting Guide5-96RDN(config)#show interface posDetermine if there is a high amount of errors occurring on the other SONET device.13. Deter

6Troubleshooting RIP

Troubleshooting RIP6-99IntroductionThis chapter provides troubleshooting solutions to some common Routing Information Protocol (RIP) problems:• Handli