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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Using Cable Interface debug Commands
debug cable startalloc Command (Channel Allocations)
This command activates debugging of channel allocations on the HFC network. When this command is
activated, messages generated when channels are allocated to cable interfaces on the HFC network are
displayed on the Cisco uBR7100 series router console. The format for the command follows:
CMTS01# debug cable startalloc
To deactivate debugging of cable channel allocations, use the following command:
CMTS01# no debug cable startalloc
debug cable transmit Command (CMTS Transmissions)
This command activates debugging of transmissions from the Cisco uBR7100 series router across the
HFC network. When this command is activated, messages generated at the headend are displayed on the
Cisco uBR7100 series router console. The format for the command follows:
CMTS01# debug cable transmit
To deactivate debugging of cable transmissions, use the following command:
CMTS01# no debug cable transmit
debug cable ucc Command (Upstream Channel Change Messages)
This command activates debugging of upstream channel change (UCC) messages generated when
cable interfaces request or are assigned a new channel. When this command is activated, messages
related to upstream channel changes are displayed on the Cisco uBR7100 series router console. The
format for the command follows:
CMTS01# debug cable ucc
To deactivate debugging of cable upstream channel changes, use the following command:
CMTS01# no debug cable ucc
debug cable ucd Command (Upstream Channel Description Messages)
This command activates debugging of upstream channel descriptor (UCD) messages. UCD messages
contain information about upstream channel characteristics and are sent to the cable modems on the HFC
network. Cable modems that are configured to use enhanced upstream channels use these UCD messages
to identify and select an enhanced upstream channel to use. When this command is activated, messages
related to upstream channel descriptors are displayed on the Cisco uBR7100 series router console. The
format for the command is as follows:
CMTS01# debug cable ucd
To deactivate debugging of cable upstream channel descriptor, use the following command:
CMTS01# no debug cable ucd
- 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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