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Chapter 2 Cisco CMTS Configuration Commands
cable qos profile
Defaults
If the
cable qos profile
command is given without any options, it creates a profile with all default values:
Baseline Privacy Interface is disabled, and all other values are set to 0.
Command Modes
Global configuration
Command History
max-downstream
rate
Maximum downstream data rate in kilobits per second that a modem
using this QoS profile receives. Valid values are from 0 to 100,000.
Default value is 0 (no downstream rate limit).
Note
This option has been deprecated and removed from the CLI,
because its function should be accomplished through the
DOCSIS configuration file.
maximum-upstream
rate
Maximum upstream data rate in kilobits per second that a modem using
this QoS profile receives. Valid values are from 0 to 100,000. Default
value is 0 (no upstream rate limit).
name
string
Arbitrary, unique string to identify this QoS profile. The maximum
length is 32 characters before Cisco IOS Release 12.2(11)BC2, and
80 characters in Cisco IOS Release 12.2(11)BC2 and later.
priority
value
Relative priority number assigned to upstream traffic by this QoS
profile. Valid values are from 0 to 7, with 7 being the highest priority.
Default value is 0.
privacy
Enables Baseline Privacy Interface (BPI) encryption. The default is to
disable BPI encryption.
tos-overwrite
tos-mask tos-
value
Overwrite the ToS field in the IP datagrams received on the upstream
before forwarding them downstream (or IP backbone). This parameter
sets the hexadecimal mask bits to the hexadecimal values for the ToS
mask and ToS value, thereby helping the CMTS identify datagrams for
QoS on the backbone.
Each parameter is an 8-bit hexadecimal value that ranges from 0x00 to
0xFF. The default value is 0xFF starting with Cisco IOS Release
12.2(15)BC2 and later, and the default is 0x00 in earlier releases. The
new TOS value is calculated using the following formula:
New ToS = ((Original ToS) AND (NOT
tos-mask
)) OR
tos-value
Note
This formula is how the TOS was calculated in DOCSIS 1.0+
networks before the DOCSIS 1.1 specification was finalized.
For information on the new method of calculating the TOS in
DOCSIS 1.1 networks, see the
cable service class
command.
Release
Modification
11.3 NA
This command was introduced.
12.0(3)T
This command was included in the Release 12.0 T train.
11.3(10)NA and
12.0(4)T
The value for the
max-burst
parameter was changed from its original value
of 0 to 255 minislots (as required in the initial DOCSIS 1.0 specification) to
the current, DOCSIS-required value of 0 to 65,535 bytes.
