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Cisco Systems uBR7200 Series Guía para resolver problemas Pagina 1

Busca en linea o descarga Guía para resolver problemas para Routers Cisco Systems uBR7200 Series. Cisco Systems uBR7200 Series Troubleshooting Manual de usuario

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CHAPTER
4-1
Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
78-5897-01
4
Troubleshooting the System
This chapter contains troubleshooting information. The chapter includes the following sections:
• Using a Cable Modem at the Headend to Verify Downstream Signals
• Managing Cable Modems on the HFC Network
• Polling Cable Modems
• Understanding Show Command Responses
• Troubleshooting Using Cable Flap Lists
• Performing Amplitude Averaging
• Setting Downstream Test Signals
• Pinging Unresponsive Cable Modems
• Using Cable Interface Debug Commands
• Managing the Cisco uBR7246 VXR Clock Card
Using a Cable Modem at the Headend to Verify
Downstream Signals
You can use a Cisco uBR924 cable access router to verify the downstream signal originating from a
Cisco uBR7200 series universal broadband router. Be sure you configure the Cisco uBR924 according
to DOCSIS cable modem practises. To verify the downstream signal from a
Cisco uBR7200 series universal router using a Cisco uBR924, follow the procedure below:
Step 1 After the Cisco uBR924 is operational and you have an input signal between 0 and +5 dBmV, enter the
show controller c0 tuner command.
Step 2 Scan the output for the value corresponding to the signal to noise (SNR) estimate variable. If this value
is at least 35 dB, then you have an optimized signal. If the value is less than 34 dB, adjust the
upconverter at the cable headend.
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Indice de contenidos

Pagina 1 - Troubleshooting the System

CHAPTER4-1Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-014Troubleshooting the SystemThis chapter contains troub

Pagina 2

4-10Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 3 - Verify Sync Message Interval

4-11Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 4 - Range, and Data Backoffs)

4-12Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 5

4-13Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 6 - Configure Per Modem Filters

4-14Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 7 - <acl>

4-15Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 8 - Clear Cable Modem Reset

4-16Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemPolling Cable ModemsSamp

Pagina 9 - Clear Cable Modem Counters

4-17Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemPolling Cable ModemsEnab

Pagina 10 - Configure Traffic Shaping

4-18Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 11 - Modem Card)

4-19Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 12 - Guided Frequency Hop

4-2Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 13

4-20Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 14 - Show Cable Hop Command

4-21Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 15

4-22Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 16 - Polling Cable Modems

4-23Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 17 - Enable SNMP

4-24Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 18 - General Show Commands

4-25Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 19 - Show Cable Modem

4-26Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 20

4-27Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 21 - 78-5897-01

4-28Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 22

4-29Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 23 - Show Cable Modem Maintenance

4-3Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 24 - Show Interface Cable

4-30Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 25

4-31Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 26

4-32Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 27

4-33Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUnderstanding Show Comma

Pagina 28

4-34Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 29

4-35Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 30

4-36Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 31 - Show Interface Cable SID

4-37Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 32

4-38Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 33

4-39Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 34 - Show Cable QoS Profile

4-4Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 35

4-40Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 36

4-41Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 37 - Display the Flap List

4-42Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 38

4-43Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 39

4-44Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemTroubleshooting Using Ca

Pagina 40

4-45Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemPerforming Amplitude Ave

Pagina 41

4-46Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemPerforming Amplitude Ave

Pagina 42

4-47Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemSetting Downstream Test

Pagina 43 - Clear Cable Flap List

4-48Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemPinging Unresponsive Cab

Pagina 44

4-49Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUsing Cable Interface De

Pagina 45

4-5Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 46

4-50Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUsing Cable Interface De

Pagina 47

4-51Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUsing Cable Interface De

Pagina 48 - Ping a Cable Modem

4-52Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUsing Cable Interface De

Pagina 49 - Debug Cable ARP Requests

4-53Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemUsing Cable Interface De

Pagina 50 - Debug Cable MAC Messages

4-54Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging the Cisco uBR72

Pagina 51 - Activate QoS Debug

4-55Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging the Cisco uBR72

Pagina 52 - Debug Upstream Messages

4-56Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging the Cisco uBR72

Pagina 53 - Debug CMTS Transmissions

4-57Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging the Cisco uBR72

Pagina 54 - Clear Clock Counters

4-58Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging the Cisco uBR72

Pagina 55 - Display Clock Values

4-6Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

Pagina 56

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Pagina 57

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Pagina 58 - Show General Information

4-9Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide78-5897-01Chapter 4 Troubleshooting the SystemManaging Cable Modems on

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