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5-31
Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
OL-2238-03
Chapter 5 Troubleshooting the System
Troubleshooting Cable Flap Lists
show cable qos profile Command
Following is a response to the show cable qos profile command. The display shows ToS specifications:
uBR7100# show cable qos profile
Service Prio Max Guarantee Max Max tx TOS TOS Create B
class upstream upstream downstream burst mask value by priv
> bandwidth bandwidth bandwidth enab
1 0 0 0 0 0 0x0 0x0 cmts(r) no
2 0 64000 0 1000000 0 0x0 0x0 cmts(r) no
3 0 1000 0 1000 0 0x0 0x0 cmts no
4 3 256000 0 512000 0 0x0 0x0 cm no
5 5 1000000 0 10000000 0 0x0 0x0 cm no
6 3 256000 0 512000 0 0x0 0x0 cm yes
Note The “r” in the “Create by” column means the first two classes of service the CMTS creates are reserved
for CMs that are not online.
Displays upstream packet discards, errors, error-free packets, correctable and uncorrectable errors, noise
and micro-reflection statistics:
show interface slot/downstream-port upstream
Troubleshooting Cable Flap Lists
The Cisco uBR7100 series maintains a database of flapping cable modems to assist in locating cable
plant problems. The flapping cable interface detector tracks the upstream and downstream performance
of all cable modems on the network, without impacting throughput and performance, or creating
additional packet overhead on the broadband network. The cable interface flap list keeps track of:
• the cable interface MAC address
• up and down transitions
• registration events
• missed periodic ranging packets
• upstream power adjustments
• the physical interface on the Cisco uBR7100 series CMTS
1st time online
Time at which the modem with this SID connected.
Times online
Number of times the modem with this SID has connected.
% online
Percentage of time the modem with this SID has been connected.
Online time
Minimum, average, and maximum number of hours and minutes
the modem with this SID has been connected.
Offline time
Minimum, average, and maximum number of hours and minutes
the modem with this SID has been disconnected.
Table 5-7 show interface cable sid Command Field Descriptions (continued)
Field Description
- 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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