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Cisco Broadband Cable Command Reference Guide
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Chapter 2 Cisco CMTS Configuration Commands
service-class
service-class
To create a DOCSIS configuration file that specifies the quality-of-service (QoS) service-class options
for the CM configuration file, use the
service-class
command in cable config-file configuration mode.
To disable the specification, use the
no
form of this command.
service-class
class
{
guaranteed-upstream
us-bandwidth
max-burst
burst-size
max-downstream
max-dsbandwidth
max-upstream
max-usbandwidth
priority
priority-num
privacy
}
no service-class
Syntax Description
Defaults
Service-class is not set by default. A CM cannot register on a Cisco CMTS unless at least one parameter in
a service class is specified.
Command Modes
Cable config-file configuration
Command History
Usage Guidelines
Default values can be used only if
service-class
class
is specified. A single configuration file should not
contain multiple service-class ID numbers. Thus, all parameters should be set using a single service-class ID.
However, different configuration files can reuse the same service-class ID.
class
Specifies service class number. Valid range is 1 to 16. Default value is 1.
guaranteed-upstream
us-bandwidth
Specifies the guaranteed upstream bandwidth in kbps. Valid range for
us-
bandwidth
is 0 to 100000 kbps. Default value is 0.
max-burst
burst-size
Specifies the maximum upstream burst size in bytes. Valid range for
burst-
size is 0 to 65535. Default value is 0, unlimited burst
length. Recommended
value range is 1600 to 1800 bytes. Using a value of 0 or greater than 1800 bytes
can cause latency issues for Voice-over-IP. A value of less than 1500 bytes
prevents upstream transmission of large Ethernet frames for any modem or
CMTS not implementing fragmentation (an optional feature in DOCSIS 1.0).
max-downstream
max-dsbandwidth
Specifies the downstream bandwidth in kbps. Valid range for
max-
dsbandwidth
is 0 to 100000 kbps. Default value is 0.
max-upstream
max-
usbandwidth
Specifies the upstream bandwidth in kbps. Valid range for
max-usbandwidth
is 0 to 100000 kbps. Default value is 0.
priority
priority-num
Specifies the service class priority. Valid range for
priority-num
is 0 to 7,
where 7 is the highest-priority service-class setting.
privacy
Enables baseline privacy interface (BPI).
Release
Modification
12.1(2)EC1
This command was introduced.
12.2(4)BC1
Support was added to the Release 12.2 BC train.
