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Chapter 3
Cisco CMTS Show Commands
Release
12.1(3a)EC
12.2(15)CX
12.2(15)CX1
12.2(15)BC2
Usage Guidelines
The show cable modulation-profile command displays modulation profile group information. A
modulation profile is a collection of burst profiles that are sent out in a Upstream Channel Descriptor
(UCD) message to configure a modem's transmit parameters for an upstream message burst type.
Table 3-35
Table 3-35 Internal Usage Code Types
IUC
IUC 1
IUC 2
IUC 3
IUC 4
IUC 5
IUC 6
1. The Cisco CMTS recognizes the reqdata burst type but does not use it.
Modulation Profile Ranges
The ranges for modulation profiles depends on the cable interface being used and the type of modulation
profile being created.
Table 3-36 Allowable Ranges for Modulation Profiles
Cable Interface
Cisco uBR7100 series
Cisco uBR-MC16C
Cisco uBR-MC16S
Cisco uBR-MC28C
OL-1581-08
Modification
This reqdata type was added as a placeholder for scripts that might
reference it, but the DOCSIS MAC scheduler on the Cisco CMTS does not
use this type of burst.
Support was added for the Cisco uBR-MC28U/X cable interface line card,
including support for DOCSIS 2.0 A-TDMA and mixed modulation profiles.
This includes adding additional information to the command's display, as
well as adding the a-long, a-short, a-ugs, and verbose options.
Added the ability to display the modulation profiles being used by a
particular cable interface and upstream.
This command displays all default modulation profiles 1, 21, 41, 101, 121,
201, 221, and 241), even when the cable interface card that is associated with
those profiles is not installed. Previous releases displayed only the default
modulation profiles that were in use.
shows the IUC codes for each burst type:
Type
Request Burst (req)
Request/Data Burst (reqdata)
Initial Ranging Burst (initial)
Station Ranging Burst (station)
Short Grant Burst (short)
Long Grant Burst (long)
Table 3-36
lists the valid ranges according to cable interface and modulation type:
DOCSIS 1.X (TDMA)
1
1 to 10
, default=1
1 to 10, default=1
1 to 10, default=1
1 to 10, default=1
IUC
Type
IUC 7
Not used
1
IUC 8
Not used
IUC 9
Advanced Phy Short Grant Burst
(a-short)
IUC 10
Advanaced Phy Long Grant
Burst (a-long)
IUC 11
Advanaced Phy Unsolicited
Grant Burst (a-ugs)
IUC 12
Not used
Mixed DOCSIS 1.X/2.0
N/A
N/A
N/A
N/A
Cisco Broadband Cable Command Reference Guide
show cable modulation-profile
DOCSIS 2.0 (A-TDMA)
N/A
N/A
N/A
N/A
3-133
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