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Chapter 2
Cisco CMTS Configuration Commands
Usage Guidelines
On a Cisco CMTS running DOCSIS 1.0 software, the cable modem qos profile command forces a CM
to use a specific QoS profile.
On a Cisco CMTS running DOCSIS 1.1 software, the cable modem qos profile command temporarily
forces a DOCSIS 1.0 or DOCSIS 1.0+ CM to use a specific QoS profile, without forcing the CM to first
go off-line and re-register. For DOCSIS 1.0+ CMs, this command affects only the primary SID on the
CM.
In Cisco IOS Release 12.2(15)BC1, this command has an effect only when the profile that it specifies
Note
and the original QoS profile on the CM have been created already on the Cisco CMTS, using the
qos profile
and this command can also be used to change the profile for a CM even when it is using a CM-created
QoS profile.
This command does not affect DOCSIS 1.1 CMs, which support dynamic service change messages that
allow the QoS profile to be changed dynamically.
This command acts as a toggle. Give the cable modem qos profile command once to enforce a QoS
Note
profile. Give the same command again with the same parameters to cancel the enforcement of that profile
(the CM will return to using its registered profile.)
When the no-persistence option is specified, the QoS profile is not applied when a cable modem reboots.
Instead, the Cisco CMTS allows the cable modem to use the QoS profile that is specified in its DOCSIS
configuration file.
The no-persistence option can be used when initially when identifying potential problem applications
and users. When repeat offenders are identified, the service provider can remove the no-persistence
option, so that these users continue to use the specified QoS profile even if they reboot their cable
modems.
Examples
The following example shows how to specify a QoS profile index to a CM:
Router# cable modem qos profile 255
Router#
Related Commands
Command
cable modem access-
group
cable modem change-
frequency
cable modem max-
hosts
show cable modem
OL-1581-08
command. In Cisco IOS Release 12.2(15)BC2 and later releases, this restriction is removed
Description
Specifies an access group for a CM.
Changes the downstream frequency or upstream channel ID.
Specifies the maximum hosts for a CM.
Displays CM configuration settings.
Cisco Broadband Cable Command Reference Guide
cable modem qos profile
cable
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