user manual

Configuring Headend Broadband Access Router Features
Configuring Cable Profiles
MC-582
Cisco IOS Multiservice Applications Configuration Guide
Verifying Cable Modulation Profiles
To verify whether or not a cable modulation profile has been created and to see how it is configured,
enter the show cable modulation-profile command:
CMTS01# show cable modulation-profile
Mo IUC Type Preamb Diff FEC err FEC Scrambl Max Guard Last Scrambl Preamb
length enco correct T seed B time CW offset
bytes size size short
1 request qpsk 64 no 0x0 0x10 0x152 1 8 no yes 56
1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0
1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0
1 short qpsk 72 no 0x5 0x4B 0x152 0 8 no yes 48
Troubleshooting Tips
To troubleshoot the configuration, perform the following tasks:
• Make sure you are in global configuration mode.
• Make sure you typed the correct modulation profile number and profile elements when you used the
command.
• Return to the default settings.
Configuring QoS Profiles
The Cisco uBR7200 series router supports multiple QoS profiles. QoS profile 1 is used during
cable modem registration; QoS profile 2 is the default QoS profile. Both of these profiles are
preconfigured and cannot be removed. However, you can modify these profiles and create additional QoS
profiles for various traffic flows.
To create or change a QoS profile, use the first command in the following table, plus as many of the
additional commands as are necessary to make the changes you require. All of the QoS profile
commands are global configuration commands.
Command Purpose
Step 1
CMTS01(config)# cable qos-profile groupnum
Creates a new QoS profile with a profile number of
groupnum
, or modifies an existing profile.
Step 2
CMTS01(config)# cable qos-profile groupnum
ip-precedence bits
Sets the bits in the ToS byte that enable you to
configure individual data rate limits on a per-modem
basis. Valid values are from 0 to 7.
Step 3
CMTS01(config)# cable qos-profile groupnum
guaranteed-upstream rate
Sets the guaranteed minimum upstream rate in kbps.
Valid values are from 0 to 100000 kbps. Default = 0
(no reserved rate).
Step 4
CMTS01(config)# cable qos-profile groupnum max-burst
size
Sets the maximum upstream transmit burst size in
bytes that the cable modem can send for any single
transmit burst. Valid values are from 0 to 4080 bytes.
Default = 0 (variable). Recommended max burst size
= 1600.