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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Polling Cable Modems
5.110.1.2 0000.0000.0023 0.0 0.0 0.0 0 0 offline
5.108.1.5 0000.0000.0026 0.0 0.0 0.0 0 0 offline
5.108.1.4 0000.0000.0024 0.0 0.0 0.0 0 0 offline
5.108.1.3 0000.0000.0025 0.0 0.0 0.0 0 0 offline
Tip To display debugging information, enter the debug cable remote-query command.
See the following for an example debug message of a successful poll of a CM:
Router# debug cable remote-query
remote-query debugging is on
.
For IP address 209.165.200.223
Nov 10 15:56:50.241: docsIfSignalQualityEntry.5.4 = 380
Nov 10 15:56:50.241: docsIfMibObjects.2.2.1.3.2 = 360
Nov 10 15:56:50.245: docsIfDownstreamChannelEntry.6.4 = -30
Nov 10 15:56:50.245: docsIfUpstreamChannelEntry.6.3 = 12422
Nov 10 15:56:50.249: docsIfSignalQualityEntry.6.4 = 0
Nov 10 15:56:50.477:
See the following for an example debug message when the waiting queue at the CMTS is empty:
SNMP proxy exec got event, but queue is empty
See the following for an example debug message when you try to modify the polling interval or
community string while polling in is progress:
Community string if modified will not be reflected
Note The polling interval is changed. To change the community string, you must reconfigure the snmp-server
community command with the new community string.
Monitoring and Maintaining Remote Querying
Use the following show commands to gather status information about the specified modems.
Command Purpose
Router# show cable flap-list
Displays statistics on the quality of the modem connection.
Router# show cable modem
Displays statistics on modem states.
Router# show cable modem
remote-query
Displays statistics gathered by SNMP agents on modem states.
Router# show interface cable
Displays statistics on the quality of the cable interface.
Router# show interface cable sid
Displays statistics on the service IDs of the specified modems.
- Text Part Number: OL-2238-03 1
- CONTENTS 3
- Contents 4
- Cisco IOS Software Options 9
- Audience 10
- Organization 10
- Conventions 11
- Additional References 12
- Obtaining Documentation 13
- Cisco.com 14
- Technical Assistance Center 14
- Contacting TAC by Telephone 15
- Overview 17
- Chapter 1 Overview 18
- Cisco Network Registrar (CNR) 19
- Cisco IOS Software Location 20
- DOCSIS Cable Plants 21
- • Regional processing centers 22
- • Headends 22
- Downstream Signals 23
- Upstream Signals 24
- EuroDOCSIS Cable Plants 27
- EuroDOCSIS STB Support 28
- Preparing for Configuration 29
- Configuring Global Parameters 36
- Interface Slot Numbering 45
- Configuring the Interfaces 45
- Cable Interface Card Slots 47
- • slot number 48
- • downstream port number 48
- • upstream port number 48
- Where to Go Next 53
- Verifying Upstream FEC 69
- Activating the Upstream Ports 74
- Verifying the Upstream Ports 75
- BPI Key Management 78
- CM Communication with BPI 79
- Enabling BPI 80
- Configuring Baseline Privacy 80
- Activating Baseline Privacy 81
- Creating Spectrum Groups 82
- Verifying Spectrum Groups 83
- Verifying Frequency Hopping 85
- Verifying ARP Requests 89
- Configuring DHCP Options 91
- Verifying Time-of-Day Service 92
- Activating IP Multicast Echo 93
- Activating IP Broadcast Echo 93
- Verifying IP Broadcast Echo 94
- Configuring QoS Profiles 97
- Verifying QoS Profiles 98
- Setting QoS Permission 99
- OL-2238-03 102
- ToS-overwrite 102
- Table 3-3 Related Commands 104
- Setting Concatenation 106
- Viewing Concatenation Status 107
- EuroDOCSIS Operation 114
- Baseline Privacy Interface 121
- Troubleshooting the System 123
- no cable secret-shared 125
- Configuring Per Modem Filters 128
- Clearing Cable Modem Reset 130
- Clearing Cable Modem Counters 131
- Configuring Traffic Shaping 131
- Using Guided Frequency Hop 133
- Polling Cable Modems 137
- General show Commands 139
- Displaying the Flap List 156
- Setting Cable Flap List Aging 160
- Setting Cable Flap List Size 162
- Clearing Cable Flap List 163
- Configuring PRBS Test Signals 167
- Verifying Test Signal Output 167
- Pinging a Cable Modem 168
- Verifying the Ping 168
- Configuration Bit Meanings 175
- Bits 0–3 176
- Bit 10 and Bit 14 178
- Bit 11 and Bit 12 178
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