Cisco uBR10-SRP-OC12SML Specifications Page 196
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- TROUBLESHOOTING
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6-4
Cisco uBR10012 Universal Broadband Router Software Configuration Guide
OL-1520-05
Chapter6 Troubleshooting the System
show cable modem
show cable modem
To display information for the registered and unregistered CMs, use the show cable modem command
in privileged EXEC mode.
show cable modem [ip-address | interface | mac-address] [options]
Some command options differ between the CiscouBR10012router (Cisco IOS Release 12.2 XF) and the
Cisco uBR7200 series routers (Cisco IOS 12.1 EC).
Note Commencing with Cisco IOS Release 12.0(7)XR and 12.1(1a)T1, the output of this command was
enhanced to show that the Cisco CMTS has detected an unstable return path for a particular CM and
has compensated with a power adjustment.
• An asterisk (*) appears in the p-adj (power adjustment) field for a modem when a power adjustment
has been made.
• An exclamation point (!) appears when the modem has reached its maximum power transmit level
and cannot increase its power level any further.
Syntax Description ip-address Identifies the IP address of a specific modem to be displayed.
interface Displays all CMs on a specific CMTS cable interface.
mac-address Identifies the MAC address of a specific CM to be displayed.
Available options when displaying information for a cable interface or for a single CM
access-group Displays access group.
connectivity Displays connectivity content.
counters Displays cable counters.
errors Displays error details for one or all CMs.
flap Displays flap content.
mac Displays the DOCSIS MAC version and capabilities.
maintenance Displays station maintenance error statistics.
offline Displays CMs that are offline.
phy Displays the phy layer content.
registered Displays information for CMs that have registered with the CMTS.
remote-query Displays the signal-noise ratio (SNR) and power statistics that the CMTS has
acquired from polling the CMs. NOTE - In Cisco 12.1 CX and above, the phy
option should be used instead of the remote-query option.
summary Displays the total number, number of active, and number of registered modems
per interface. This option can be used with total and upstream options to
display details for specific line cards and ports.
unregistered Displays information for CMs that have not registered with the CMTS.
verbose Displays detailed information, replacing the former detail option, and
providing information such as:
• Signal-to-noise ratio (SNR) information for each CM on each interface
• Summary display of the total number of modems connected for each
upstream channel
• Total number of registered and unregistered modems for the specified
interface or upstream
Total number of offline modems for the specified interface or upstream and
status for each offline modem before it went offline
- Text Part Number: OL-1520-08 1
- CONTENTS 3
- Contents 4
- Document Revision History 9
- Audience 10
- Document Organization 10
- Conventions 11
- Terms and Acronyms 12
- OL-1520-06 13
- Additional References 14
- Standards 15
- Obtaining Documentation 16
- Ordering Documentation 17
- Documentation Feedback 17
- Cisco.com 17
- Technical Assistance Center 18
- Cisco TAC Escalation Center 19
- Broadband Router Software 21
- Operational Overview 22
- Cisco IOS Software Location 22
- DOCSIS 1.1 Feature Support 31
- High Availability Features 31
- Intercept Features 32
- IP Routing Features 32
- Management Features 32
- AutoInstall 35
- Cisco Network Registrar 35
- Extended Setup Facility 35
- Integrated DHCP Server 37
- DOCSIS 1.0 Feature Support 38
- DOCSIS 1.0 MAC Driver 40
- DOCSIS 1.0 Multi SID Support 42
- DOCSIS 1.0 ToS Overwrite 44
- DOCSIS 1.0+ Feature Support 47
- Additional Information 48
- DOCSIS 1.1 CM Compatibility 50
- Commands 51
- DOCSIS 1.1 MAC Scheduler 53
- Basic Wiretap Support 67
- Cable Monitor Enhancements 67
- Additional COPS Information 71
- Packet Intercept 73
- PXF ARP Filter 73
- PXF Divert Rate Limiting 73
- IP Broadcast Echo 75
- IP Multicast Echo 75
- SSM Mapping 76
- • Cable ARP Filtering 78
- Integrated Time-of-Day Server 79
- Cable Interface Bundling 82
- CNEM Compliance 82
- Broadband Internet Access 82
- DOCSIS 2.0 SAMIS ECR Data Set 83
- Changes from Cisco DSG 1.0 84
- Prerequisites for DSG 1.1 85
- Downstream Frequency Override 86
- Dynamic Modulation Profiles 87
- Dynamic Upstream Modulation 88
- CISCO-CABLE-METERING-MIB 89
- CISCO-CABLE-QOS-MONITOR MIB 90
- CISCO-CABLE-SPECTRUM-MIB 90
- CISCO-ENHANCED-MEMPOOL-MIB 91
- CISCO-PROCESS-MIB 91
- DOCS-QOS-MIB 91
- DSG-IF-MIB 91
- Restrictions 92
- • debug cable range 94
- Spectrum Management 96
- Statistical Counters 97
- Usage Based Billing (SAMIS) 98
- PacketCable 1.0 With CALEA 99
- OL-1520-08 104
- Security Features 105
- Address Verification 106
- CM Transmission Burst Size 106
- Dynamic Ranging 108
- Flap List Support 109
- Virtual Interfaces 110
- VLAN Features 112
- IPv6 over L2VPN 113
- MPLS-VPN Network Support 113
- • TLS for the Cisco CMTS 117
- System for the First Time 119
- Preparing for Configuration 120
- Fundamentals 121
- OL-1520-05 122
- Configuring Global Parameters 126
- Configuration Mode 131
- MAC-Layer Addressing 132
- Identifying CM Line Cards 133
- CiscouBR10012Router 137
- Verifying ARP Requests 140
- Activating Downstream Ports 141
- Activating the Upstream Ports 150
- Verifying the Upstream Ports 151
- Troubleshooting Tips 161
- no cable proxy-arp 163
- Setting IP Multicast Echo 164
- Verifying IP Multicast Echo 164
- Setting IP Broadcast Echo 165
- Verifying IP Broadcast Echo 165
- Fiber-Coaxial Network 175
- Activating CM Authentication 176
- Verify CM Authentication 177
- Clearing CM Counters 179
- Clearing CM Reset 180
- Configuring Per-Modem Filters 183
- Troubleshooting the System 193
- : 1624 197
- Configuring PRBS Test Signals 207
- Verifying Test Signal Output 207
- Pinging Unresponsive CMs 208
- DOCSIS Specification Summary 213
- • Regional processing centers 214
- • Headends 214
- CMTS Traffic Engineering 217
- Configuration Bit Meanings 221
- Bits 0–3 222
- Bit 10 and Bit 14 224
- Bit 11 and Bit 12 224
- OL-1520-04 229
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