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Cisco Broadband Cable Command Reference Guide
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Chapter 3 Cisco CMTS Show Commands
show cable modulation-profile
Note
Default modulation profiles are created for each type of card and operation mode. You cannot delete the
default modulation profiles (1, 21, 41, 101, 121, 201, 221, and 241). In Cisco IOS Release 12.2(15)BC2
and later, all default modulation profiles are displayed, even when that particular cable interface is not
installed. In previous versions, only the default modulation profiles that were in use were displayed.
Examples
The following is sample output from the
show cable modulation-profile
command in Cisco IOS
Release 12.2(11)BC3 and earlier releases:
CMTS01#
show cable modulation-profile
Mo IUC Type Preamb Diff FEC FEC Scrambl Max Guard Last Scrambl Preamb
length enco T CW seed B time CW offset
bytes size size size short
1 request qpsk 64 no 0x0 0x10 0x152 1 8 no yes 56
1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0
1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0
1 short qpsk 72 no 0x5 0x4B 0x152 0 8 no yes 48
The following is sample output from the
show cable modulation-profile
command in Cisco IOS
Release 12.2(15)CX and later releases:
Router#
show cable modulation-profile
Mod IUC Type Pre Diff FEC FEC Scrmb Max Guard Last Scrmb Pre Pre RS
len enco T k seed B time CW offst Type
BYTE BYTE siz size short
1 request qpsk 64 no 0x0 0x10 0x152 0 8 no yes 184 qpsk na
1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 128 qpsk na
1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 128 qpsk na
1 short qpsk 72 no 0x4 0x4C 0x152 12 8 yes yes 176 qpsk na
1 long qpsk 80 no 0x9 0xEC 0x152 0 8 yes yes 168 qpsk na
41 request qpsk 68 no 0x0 0x10 0x152 0 8 no yes 0 qpsk na
41 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
41 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
41 short qpsk 80 no 0x4 0x4C 0x152 12 8 yes yes 0 qpsk na
41 long qpsk 80 no 0x8 0xEC 0x152 0 8 yes yes 0 qpsk na
45 request qpsk 68 no 0x0 0x10 0x152 0 8 no yes 0 qpsk na
45 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
45 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
45 short 16qam 160 no 0x6 0x4C 0x152 7 8 yes yes 0 16qam na
45 long 16qam 160 no 0x8 0xE7 0x152 0 8 yes yes 0 16qam na
141 request qpsk 68 no 0x0 0x10 0x152 0 8 no yes 0 qpsk na
141 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
141 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 qpsk na
141 short 16qam 160 no 0x6 0x4C 0x152 7 8 yes yes 0 16qam na
Cisco uBR-MC5X20S,
Cisco uBR-MC5X20U
21 to 30, default=21
121 to 130, default=121 221 to 230, default=221
Cisco uBR-MC16U/X,
Cisco uBR-MC28U/X
41 to 50, default=41
141 to 150, default=141 241 to 250, default=241
1.
Only 8 modulation profiles are supported in Cisco IOS software releases before 12.2(15)BC1, so in these releases the valid
range is 1 to 8.
Table 3-36 Allowable Ranges for Modulation Profiles
Cable Interface
DOCSIS 1.X (TDMA)
Mixed DOCSIS 1.X/2.0
DOCSIS 2.0 (A-TDMA)