user manual

Configuring Headend Broadband Access Router Features
Configuring Cable Profiles
MC-583
Cisco IOS Multiservice Applications Configuration Guide
Note You can use a single cable qos-profile command to configure multiple parameters for the
selected QoS profile number.
Use the no cable qos-profile groupnum command to remove an optional QoS profile, or in the case of
QoS profiles 1 and 2, to return the parameters to their default values.
Verifying QoS Profiles
To verify whether or not a QoS profile has been created, and to see how it is configured, enter the show
cable qos profile command:
CMTS01# 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 no
2 0 64000 0 1000000 0 0x0 0x0 cmts no
3 0 1000 0 1000 0 0x0 0x0 cmts no
4 7 2000000 100000 4000000 0 0x0 0x0 cm yes
Troubleshooting Tips
To troubleshoot the configuration, perform the following tasks:
• Make sure you are in global configuration mode.
• Make sure you typed the correct QoS profile number and profile elements when you used the
command.
• Note that cable modems that register continuously and fail consume more resources than
cable modems that stay registered.
• Note that DOCSIS 1.0-certified cable modems that are given a short max-burst size may be unable
to transmit large packets to the headend.
Step 5
CMTS01(config)# cable qos-profile groupnum
max-upstream rate
Sets the maximum upstream data rate in kbps that a
cable modem using this QoS profile will send. Valid
values are from 0 to 100000 kbps. Default = 0 (no
upstream rate limit.)
Step 6
CMTS01(config)# cable qos-profile groupnum
max-downstream rate
Sets the maximum downstream data rate in kbps that
a cable modem using this QoS profile will receive.
Valid values are from 0 to 100000 kbps. Default = 0
(no downstream rate limit.)
Step 7
CMTS01(config)# cable qos-profile groupnum priority
number
Assigns a relative priority number for the upstream
traffic associated with this QoS profile. Valid values
are from 0 to 7, with 7 being the highest priority.
Default = 0.
Step 8
CMTS01(config)# cable qos-profile groupnum
tos-overwrite value
Overwrites the ToS byte in the IP datagrams received
on the upstream before forwarding them downstream.
Sets the mask bits to a hexadecimal value to help the
CMTS identify datagrams for QoS on the backbone.
Command Purpose