DOCSIS 3.1 OFDM Channel Configuration

This document describes how to configure the OFDM channel on the Cisco cBR Series Converged Broadband Router.

Hardware Compatibility Matrix for the Cisco cBR Series Routers


Note
The hardware components that are introduced in a given Cisco IOS-XE Release are supported in all subsequent releases unless otherwise specified.
Table 1. Hardware Compatibility Matrix for the Cisco cBR Series Routers

Cisco CMTS Platform

Processor Engine

Interface Cards

Cisco cBR-8 Converged Broadband Router

Cisco IOS-XE Release 16.5.1 and Later Releases

Cisco cBR-8 Supervisor:

  • PID—CBR-SUP-250G

  • PID—CBR-CCAP-SUP-160G

Cisco IOS-XE Release 16.5.1 and Later Releases

Cisco cBR-8 CCAP Line Cards:

  • PID—CBR-LC-8D30-16U30

  • PID—CBR-LC-8D31-16U30

  • PID—CBR-RF-PIC

  • PID—CBR-RF-PROT-PIC

  • PID—CBR-CCAP-LC-40G

  • PID—CBR-CCAP-LC-40G-R

  • PID—CBR-CCAP-LC-G2-R

  • PID—CBR-SUP-8X10G-PIC

  • PID—CBR-2X100G-PIC

Digital PICs:

  • PID—CBR-DPIC-8X10G

  • PID—CBR-DPIC-2X100G

Cisco cBR-8 Downstream PHY Module:

  • PID—CBR-D31-DS-MOD

Cisco cBR-8 Upstream PHY Modules:

  • PID—CBR-D31-US-MOD

Note

Do not use DPICs (8X10G and 2x100G) to forward IP traffic, as it may cause buffer exhaustion, leading to line card reload.

The only allowed traffic on a DPIC interface is DEPI, UEPI, and GCP traffic from the Cisco cBR-8 router to Remote PHY devices. Other traffic such as DHCP, SSH, and UTSC should flow via another router, since DPICs cannot be used for normal routing.

Information about OFDM Channel Configuration

OFDM Channels

DOCSIS 3.1 introduces modes for higher throughput and higher spectral efficiency while still allowing backward compatibility to DOCSIS 3.0. The OFDM Channel support includes two OFDM channels per port with channel bandwidth from 24 MHz to 192 MHz wide.

From the Cisco IOS XE Gibraltar 16.10.1d release, the Cisco cBR router supports two OFDM channels per service group for an RPD downstream port. You can configure the channels using the cable downstream controller-profile configuration.

cBR-8 routers support 158 SC-QAMs for a single OFDM channel and 128 SC-QAMs for multiple OFDM channels. The max-carrier attribute is automatically set to 158 by default. However, you should set the max-carrier to a value of 128 or below to configure multiple OFDM channels. The Cisco cBR router does not support any value above 128 if you are configuring multiple OFDM channels.

Each OFDM channel supports a control profile, an NCP profile, and up to five data profiles. Profiles support one or more modulations.

You can configure the guard band of an OFDM channel to potentially trade-off some performance margin using command guardband-override . By default, Cisco cBR-8 routers use the default guard band, which is based on the roll off and spacing in the OFDM channel profile.

DOCSIS 3.1 OFDM support also allows the user to configure the RF-channels 158–162 under the mac-domain as the primary channel.

OFDM Channel Configuration

Table 2. Feature History

Feature Name

Release Information

Feature Description

Support for the Configuration of 4 OFDM Channels

Cisco IOS XE Dublin 17.12.1

In this release, you can configure 4 OFDM Channels per Service Group (SG) on cBR-8 routers. 2Gx1G Service Tiers are supported by configuring 4 OFDM channels in each downstream (DS) SG. This feature is supported on KOBOL-R and Cylon-R line cards.

Max-carrier Configuration

Max-carrier configuration specifies the maximum number of SCQAM channels of the controller. The combinations of SCQAM and OFDM channels per controller are:

1 OFDM + 158 SCQAM;

2 OFDM + 128 SCQAM;

3 OFDM + 96 SCQAM;

4 OFDM + 64 SCQAM;

Router(config)#cable downstream controller-profile 10
Router(config-controller-profile)#max-carrier 158
Router(config-prof-rf-chan)#rf-chan 158
Router(config-prof-rf-chan)#docsis-channel-id 159
Router(config-prof-rf-chan)#9000000 width 96000000 plc 795000000
Router(config-prof-rf-chan)#rf-chan 159
Router(config-prof-rf-chan)#docsis-channel-id 160
Router(config-prof-rf-chan)#5000000 width 96000000 plc 891000000

Error: Max-carrier 158 > 128 can support only one OFDM channel.
Reduce max-carrier to 128 or lower to use 2nd OFDM channel.

Sample Configuration for Max OFDM Channels

The following example shows a sample configuration:

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#cable downstream controller-profile 104
Router(config-controller-profile)#max-carrier 64
Router(config-controller-profile)#max-ofdm-spectrum 480000000
Router(config-controller-profile)#rf-chan 0 63
Router(config-prof-rf-chan)#type DOCSIS
Router(config-prof-rf-chan)#qam-profile 1
Router(config-prof-rf-chan)#frequency 231000000
Router(config-prof-rf-chan)#rf-output NORMAL
Router(config-prof-rf-chan)#docsis-channel-id 1
Router(config-prof-rf-chan)#rf-chan 158
Router(config-prof-rf-chan)#docsis-channel-id 159
Router(config-prof-rf-chan)#ofdm channel-profile 2 start-frequency 789000000 width 96000000 plc 795000000
Router(config-prof-rf-chan)#rf-chan 159
Router(config-prof-rf-chan)#docsis-channel-id 160
Router(config-prof-rf-chan)#ofdm channel-profile 2 start-frequency 885000000 width 96000000 plc 891000000
Router(config-prof-rf-chan)#rf-chan 160
Router(config-prof-rf-chan)#docsis-channel-id 161
Router(config-prof-rf-chan)#ofdm channel-profile 2 start-frequency 981000000 width 96000000 plc 987000000
The DS controller profile 104 should be applied to RPDs which have capability to support the same or more number of OFDM channels.

Router(config-prof-rf-chan)#rf-chan 161
Router(config-prof-rf-chan)#docsis-channel-id 162
Router(config-prof-rf-chan)#ofdm channel-profile 20 start-frequency 1077000000 width 96000000 plc 1083000000
The DS controller profile 104 should be applied to RPDs which have capability to support the same or more number of OFDM channels.

Router(config-prof-rf-chan)#rf-chan 162
Router(config-prof-rf-chan)#docsis-channel-id 163
Router(config-prof-rf-chan)#ofdm channel-profile 2 start-frequency 1173000000 width 96000000 plc 1179000000
Error: Max 4 ofdm channels per controller permitted.
Router(config-prof-rf-chan)#end

Use the following command to see the running configuration:


Router#sh run | s cable downstream controller-profile 104
cable downstream controller-profile 104
 max-carrier 64
 max-ofdm-spectrum 480000000
 rf-chan 0 63
  type DOCSIS
  qam-profile 1
  frequency 231000000
  rf-output NORMAL
  docsis-channel-id 1
 rf-chan 158
  docsis-channel-id 159
  ofdm channel-profile 2 start-frequency 789000000 width 96000000 plc 795000000
 rf-chan 159
  docsis-channel-id 160
  ofdm channel-profile 2 start-frequency 885000000 width 96000000 plc 891000000
 rf-chan 160
  docsis-channel-id 161
  ofdm channel-profile 2 start-frequency 981000000 width 96000000 plc 987000000
 rf-chan 161
  docsis-channel-id 162
  ofdm channel-profile 20 start-frequency 1077000000 width 96000000 plc 1083000000
 rf-chan 162
  docsis-channel-id 163
Router#

Use the following command to verify the configuration:

Router#show cable downstream controller-profile 104
Downstream controller-profile 104, type RPHY
Description: 
  Admin:  UP 
  MaxOfdmSpectrum: 480000000
  MaxCarrier: 64
  Mode: normal
  Free freq block list has 3 blocks:
    45000000  - 227999999
    612000000 - 788999999
    1173000000 - 1217999999
  DS Splitting: No 
  OFDM frequency exclusion bands: None

Configured RF Channels:
Chan Admin Frequency  Type        Annex Mod  srate Qam-profile  dcid  output
 0    UP   231000000  DOCSIS       B    256   5361  1           1     NORMAL
 1    UP   237000000  DOCSIS       B    256   5361  1           2     NORMAL
 2    UP   243000000  DOCSIS       B    256   5361  1           3     NORMAL
 3    UP   249000000  DOCSIS       B    256   5361  1           4     NORMAL
 4    UP   255000000  DOCSIS       B    256   5361  1           5     NORMAL
 5    UP   261000000  DOCSIS       B    256   5361  1           6     NORMAL
 6    UP   267000000  DOCSIS       B    256   5361  1           7     NORMAL
 7    UP   273000000  DOCSIS       B    256   5361  1           8     NORMAL
 8    UP   279000000  DOCSIS       B    256   5361  1           9     NORMAL
 9    UP   285000000  DOCSIS       B    256   5361  1           10    NORMAL
 10   UP   291000000  DOCSIS       B    256   5361  1           11    NORMAL
 11   UP   297000000  DOCSIS       B    256   5361  1           12    NORMAL
 12   UP   303000000  DOCSIS       B    256   5361  1           13    NORMAL
 13   UP   309000000  DOCSIS       B    256   5361  1           14    NORMAL
 14   UP   315000000  DOCSIS       B    256   5361  1           15    NORMAL
 15   UP   321000000  DOCSIS       B    256   5361  1           16    NORMAL
 16   UP   327000000  DOCSIS       B    256   5361  1           17    NORMAL
 17   UP   333000000  DOCSIS       B    256   5361  1           18    NORMAL
 18   UP   339000000  DOCSIS       B    256   5361  1           19    NORMAL
 19   UP   345000000  DOCSIS       B    256   5361  1           20    NORMAL
 20   UP   351000000  DOCSIS       B    256   5361  1           21    NORMAL
 21   UP   357000000  DOCSIS       B    256   5361  1           22    NORMAL
 22   UP   363000000  DOCSIS       B    256   5361  1           23    NORMAL
 23   UP   369000000  DOCSIS       B    256   5361  1           24    NORMAL
 24   UP   375000000  DOCSIS       B    256   5361  1           25    NORMAL
 25   UP   381000000  DOCSIS       B    256   5361  1           26    NORMAL
 26   UP   387000000  DOCSIS       B    256   5361  1           27    NORMAL
 27   UP   393000000  DOCSIS       B    256   5361  1           28    NORMAL
 28   UP   399000000  DOCSIS       B    256   5361  1           29    NORMAL
 29   UP   405000000  DOCSIS       B    256   5361  1           30    NORMAL
 30   UP   411000000  DOCSIS       B    256   5361  1           31    NORMAL
 31   UP   417000000  DOCSIS       B    256   5361  1           32    NORMAL
 32   UP   423000000  DOCSIS       B    256   5361  1           33    NORMAL
 33   UP   429000000  DOCSIS       B    256   5361  1           34    NORMAL
 34   UP   435000000  DOCSIS       B    256   5361  1           35    NORMAL
 35   UP   441000000  DOCSIS       B    256   5361  1           36    NORMAL
 36   UP   447000000  DOCSIS       B    256   5361  1           37    NORMAL
 37   UP   453000000  DOCSIS       B    256   5361  1           38    NORMAL
 38   UP   459000000  DOCSIS       B    256   5361  1           39    NORMAL
 39   UP   465000000  DOCSIS       B    256   5361  1           40    NORMAL
 40   UP   471000000  DOCSIS       B    256   5361  1           41    NORMAL
 41   UP   477000000  DOCSIS       B    256   5361  1           42    NORMAL
 42   UP   483000000  DOCSIS       B    256   5361  1           43    NORMAL
 43   UP   489000000  DOCSIS       B    256   5361  1           44    NORMAL
 44   UP   495000000  DOCSIS       B    256   5361  1           45    NORMAL
 45   UP   501000000  DOCSIS       B    256   5361  1           46    NORMAL
 46   UP   507000000  DOCSIS       B    256   5361  1           47    NORMAL
 47   UP   513000000  DOCSIS       B    256   5361  1           48    NORMAL
 48   UP   519000000  DOCSIS       B    256   5361  1           49    NORMAL
 49   UP   525000000  DOCSIS       B    256   5361  1           50    NORMAL
 50   UP   531000000  DOCSIS       B    256   5361  1           51    NORMAL
 51   UP   537000000  DOCSIS       B    256   5361  1           52    NORMAL
 52   UP   543000000  DOCSIS       B    256   5361  1           53    NORMAL
 53   UP   549000000  DOCSIS       B    256   5361  1           54    NORMAL
 54   UP   555000000  DOCSIS       B    256   5361  1           55    NORMAL
 55   UP   561000000  DOCSIS       B    256   5361  1           56    NORMAL
 56   UP   567000000  DOCSIS       B    256   5361  1           57    NORMAL
 57   UP   573000000  DOCSIS       B    256   5361  1           58    NORMAL
 58   UP   579000000  DOCSIS       B    256   5361  1           59    NORMAL
 59   UP   585000000  DOCSIS       B    256   5361  1           60    NORMAL
 60   UP   591000000  DOCSIS       B    256   5361  1           61    NORMAL
 61   UP   597000000  DOCSIS       B    256   5361  1           62    NORMAL
 62   UP   603000000  DOCSIS       B    256   5361  1           63    NORMAL
 63   UP   609000000  DOCSIS       B    256   5361  1           64    NORMAL
Chan Admin Mod-Type  Start       Width     PLC        Profile-ID    dcid  output
                     Frequency                                      
 158  UP   OFDM      789000000   96000000  795000000       2        159   NORMAL
 159  UP   OFDM      885000000   96000000  891000000       2        160   NORMAL
 160  UP   OFDM      981000000   96000000  987000000       2        161   NORMAL
 161  UP   OFDM      1077000000  96000000  1083000000      20       162   NORMAL

Router#

Note

  • If you configure more than four ofdm channels per controller, then the following message is displayed: Error: Max 4 ofdm channels per controller permitted.

  • If you configure more than two, three, or four ofdm channels per controller, then the following error message is displayed: The DS controller profile 104 should be applied to RPDs which have capability to support the same or more number of OFDM channels.

RPD OFDM Capability

Use the following command to obtain how many OFDM channels are supported on the cBR-8 router.

Router#show cable rpd 1004.9fb1.0300 capability | i OFDM Channel
Downstream OFDM Channels Per Port : 2

The RPD reports the above information.

The number of OFDM channels in the DS controller profile should be less than or equal to the RPD's capability. Use the cable rphy rpd-capability reject-mismatch to control whether RPDs with OFDM capability mismatch are online or not. This command is enabled by default. If the command is enabled, then RPDs with OFDM capability mismatch do not become online. You can use no cable rphy rpd-capability reject-mismatch command to disable this configuration and to accept the capabilities mismatch and let the RPDs come online, but in this case, the RPDs may behave in a nondeterministic manner.

The following example shows you how to configure the no cable rphy rpd-capability reject-mismatch command, accept the capabilities mismatch and let the RPDs come online. 

Router#show cable rpd 0004.9f31.0979 capability | s Downstream OFDM
Downstream OFDM Channels Per Port         : 2

Router#show cable rpd
MAC Address     IP Address       I/F       State        Role HA  Auth Name                          
0004.9f31.0979  ---              Te6/1/0   online       Pri  Act N/A  RPD1

Router(config)#cable rpd RPD1
Router(config-rpd)# identifier 0004.9f31.0979
Router(config-rpd)# core-interface Te6/1/0
Router(config-rpd-core)#  principal
Router(config-rpd-core)#rpd-ds 0 downstream-cable 6/0/3 profile 23

2023/01/16 12:27:14.953736374 {rphyman_R0-0}{255}: [errmsg] [1630]: UUID: 0, ra: 0 (ERR): %RPHYMAN-3-RPD_CAPA_PARAM_MISMATCH_ERROR: 
R0/0: rphyman: rpd_capa check, rpd_id: 0004.9f31.0979, 	config_value 3 rpdCapa_value 2, event: NumDsOfdmChannels mismatch, reject RPD online, 
please configure OFDM channels equal to its capability..

Router#show cable rpd
MAC Address     IP Address       I/F       State        Role HA  Auth Name
0004.9f31.0979  ---              Te6/1/0   offline      Pri  Act N/A  RPD1

After configuring the no cable rphy rpd-capability reject-mismatch command, the RPD status displays as online as shown in the show cable rpd output below. 

Router(config)#no cable rphy rpd-capability reject-mismatch

2023/01/16 12:32:13.480653142 {rphyman_R0-0}{255}: [errmsg] [1630]: UUID: 0, ra: 0 (warn): %RPHYMAN-4-RPD_CAPA_PARAM_MISMATCH_WARNING: 
R0/0: rphyman: rpd_capa check, rpd_id: 0004.9f31.0979, config_value 3 rpdCapa_value 2, event: NumDsOfdmChannels mismatch, accept RPD online, 
but it may behave in a non-deterministic manner, suggest configure OFDM channels equal to its capability.

Router#show cable rpd
MAC Address     IP Address       I/F       State        Role HA  Auth Name
0004.9f31.0979  ---              Te6/1/0   init(gcp)    Pri  Act N/A  RPD1
	
Router#show cable rpd
MAC Address     IP Address       I/F       State        Role HA  Auth Name
0004.9f31.0979  ---              Te6/1/0   online       Pri  Act N/A  RPD1

See cable rphy rpd-capability reject-mismatch.

Static Bonding Group

The Maximum OFDM channels count per Static Bonding Group is 2.

Router(config-if)#cable rf-channels channel-list 158-159 bandwidth-percent 50
Router(config-if)#do sh run int wi6/0/3:4
Building configuration...
Current configuration : 135 bytes
!
interface Wideband-Cable6/0/3:4
 cable bundle 1
 cable rf-channels channel-list 158-159 bandwidth-percent 50
 end
Router(config-if)#cable rf-channels channel-list 160-161 bandwidth-percent 20
Error: Static Bonding Group supports only 2 ofdm channels!!
Router(config-if)#do sh run int wi6/0/3:4
Building configuration...
Current configuration : 135 bytes
interface Wideband-Cable6/0/3:4
 cable bundle 1
 cable rf-channels channel-list 158-159 bandwidth-percent 50
 end

Router(config)#cable profile service-group SG
Router(config-profile-sg)#cable bundle 1
Router(config-profile-sg)#mac-domain 0 profile MD1
Router(config-profile-sg-md)#downstream sg-channel 0-3 profile DS1
Router(config-profile-sg-md)#upstream 0 sg-channel 0
Router(config-profile-sg-md)#upstream 1 sg-channel 1 
Router(config-profile-sg-md)#upstream 2 sg-channel 2
Router(config-profile-sg-md)#wideband-interface 0 profile BG1
 The WB Profile doesn't exist, please create it.
Router(config-profile-sg)#cable profile wideband-interface BG1
Router(config-profile-sg)#cable downstream attribute-mask 80000000
Router(config-profile-sg)#wideband-interface 0 profile BG1
Router(config-profile-sg-bg)#downstream sg-channel 158-160 rf-bandwidth-percent 20      
Error: Static Bonding Group supports only 2 ofdm channels!!
Router(config-profile-sg-bg)#downstream sg-channel 158-159 rf-bandwidth-percent 20
Router(config-profile-sg-bg)#do sh run | i bandwidth 
 downstream sg-channel 0-7 rf-bandwidth-percent 1
  downstream sg-channel 8-15 rf-bandwidth-percent 1
  downstream sg-channel 16-23 rf-bandwidth-percent 1
  downstream sg-channel 24-31 rf-bandwidth-percent 1
  downstream sg-channel 24-31 158 rf-bandwidth-percent 1
  downstream sg-channel 24-31 rf-bandwidth-percent 1
  downstream sg-channel 158-159 rf-bandwidth-percent 20

Dynamic Bonding Group (DBG)

DBG is a feature that creates WB interface dynamically for LB or registration purposes. Max OFDM channel count per DBG is also 2. You can globally enable DBG using the following configuration. 

Router# cable dynamic-bonding-group

Use no cable dynamic-bonding-group to disable DBG.

You can also enable Registration or Load Balance separately. 

Router# cable dynamic-bonding-group registration

Router# cable dynamic-bonding-group load-balance

Use the no form of the command to disable Registration or Load Balance.

Router# no cable dynamic-bonding-group registration

Router# no cable dynamic-bonding-group load-balance

The following example is a sample configuration for 64 SCQAM + 4OFDM - SCQAM primary channel

Router#show derived-config interface c3/0/0
Building configuration...

Derived configuration : 1754 bytes
!
interface Cable3/0/0
 downstream Downstream-Cable 3/0/0 rf-channel 0 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 4 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 8 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 12 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 16 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 20 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 24 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 28 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 32 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 36 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 40 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 44 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 48 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 52 profile DS1
 downstream Downstream-Cable 3/0/0 rf-channel 56 profile DS1

Router#show cable dynamic-bonding-group summary
Dynamic bonding group: Enable
DBG operation with Registration: Enable
DBG operation with Load-Balance: Enable
BG ID BG Name      BG Size  CMs  ServFlows Create Time           Create Client        BG State             RFid list
24577 Wi3/0/0:0    34       12   60        Jun 26 17:12:08.596   MODEM_ONLINE         OPERATIONAL          24608-24639, 24736-24737
24578 Wi3/0/0:1    34       10   50        Jun 26 17:12:19.411   MODEM_ONLINE         OPERATIONAL          24576-24607, 24734-24735

Load Balancing (LB)

There are two types of Load Balancing:

  • Static LB: Balances modem during registration based on the modem count.

  • Dynamic LB: Balances modem after modem registration based on the traffic or utilization.

Before 4OFDM, LB(SLB and DLB) doesn’t change the OFDM channel of the DOCSIS 3.1 modem in modem movement, SLB doesn’t move the DOCSIS 3.1 modem when the modem is using OFDM primary channel, and DLB only changes DOCSIS 3.1 modem’s SCQAM channel set for balance purpose.

With 4OFDM, LB does balance among 4 OFDM channels, LB changes the modem’s OFDM channel set for balance purpose.

There are two rules for DOCSIS 3.1 modem movement in LB.

  • If the DOCSIS 3.1 modem uses SCQAM channel as a primary channel, LB only changes the primary channel of the DOCSIS 3.1 modem to SCQAM primary channel, not to OFDM primary channel.

  • f the DOCSIS 3.1 modem use OFDM channel as a primary channel, LB only change the primary channel of the DOCSIS 3.1 modem to OFDM primary channel, not to SCQAM primary channel.

The following example shows Load-Balancing SG profile:

Router# show cable profile service-group
cable profile service-group SG-64 
cable bundle 1 
mac—domain O profile MD1
downstream sg-channel 0 4 8 12 20 24 28 32 36 40 44 48 52 56 profile 
upstream 1 sg-channel 0
upstream 1 sg-channel 1
upstream 2 sg-channel 2
upstream 3 sg-channel 4
upstream 4 sg-channel 5
upstream 5 sg-channel 6
upstream 6 sg-channel 7
us-bonding-group 1 
upstream 0
upstream 1 
upstream 2 
upstream 3 
us-bonding-group 2 
upstream 4 
upstream 5 
upstream 6 
upstream 7 
attributes 80000000 
Router #show cable mac—domain c3/0/O rcc 

RCC-ID RCP             RCs MD-DS-SG CMS WB/RCC-TMPL D3.0 D3.1 
17     00 00 00 00 00  34  0        10  (Wi3/O/O:O)  N    Y
18     00 00 00 00 00  34  0        12  (Wi3/O/O:1)  N    Y

The following example shows DBG Load Balancing:


Router#show cable dynamic-bonding-group summary
Dynamic bonding group: Enable
DBG operation with Registration: Enable
DBG operation with Load-Balance: Enable
BG ID BG Name      BG Size  CMs  ServFlows Create Time           Create Client        BG State             RFid list
24577 Wi3/0/0:0    34       13   65        Jun 26 17:12:08.597   MODEM_ONLINE         OPERATIONAL          24608-24639, 24736-24737
24578 Wi3/0/0:1    34       9    45        Jun 26 17:12:19.412   MODEM_ONLINE         OPERATIONAL          24576-24607, 24734-24735

video-LWR-S-A4#sh derived-config interface Wi3/0/0:0
Building configuration...

Derived configuration : 147 bytes
!
interface Wideband-Cable3/0/0:0
 cable bundle 1
 cable rf-channels channel-list 32-63 160-161 bandwidth-percent 1
 no snmp trap link-status
end

Router#show derived-config interface Wi3/0/0:1
Building configuration...

Derived configuration : 146 bytes
!
interface Wideband-Cable3/0/0:1
 cable bundle 1
 cable rf-channels channel-list 0-31 158-159 bandwidth-percent 1
 no snmp trap link-status
end

The following example shows Static Load Balancing:

Router#show cable load-balance 
DOCSIS 2.0 LB enabled: Yes
DOCSIS 3.0 LB enabled: Yes
DOCSIS 3.0 Static LB Enabled: Yes 
DOCSIS 3.0 Dynamic Downstream LB Enabled: Yes 
DOCSIS 3.0 Dynamic Upstream LB Enabled: No 

DOCSIS 3.0 general LB 
MD      FN  Group ID   S Intv  DCC mask Policy     Mtd MD-CM-SG  Threshold
			       /UCC	           D/U           M/E/U/P/S 		
Ca3/0/0  1  2147557376 E 45    0x08 (4) N 0        m/m 0x90012C  5/10/70/70/50 
Ca3/0/0  2  2147557377 E 45    0x08 (4) N 0        m/m 0x900130  5/10/70/70/50
Ca3/0/2  5  2147558404 E 90    0x08 (4) N 0        m/m 0x920401  10/20/70/70/50  
Ca3/0/2  5  2147558405 E 90    0x08 (4) N 0        m/m 0x920402  10/20/70/70/50  
Router#show cable load-balance docsis-group fn 1 md c3/0/0 load | in Do 
Do3/0/0:0(453 MHz)   initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:4(477 MHz)   initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:8(501 MHz)   initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:12(525 MHz)  initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:16(549 MHz)  initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:20(573 MHz)  initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:24(597 MHz)  initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:28(621 MHz)  initial 2147557376  97%(90%/97%)  0%  0    12    37
Do3/0/0:32(645 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:36(669 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:40(693 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:44(717 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:48(717 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:52(717 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37
Do3/0/0:56(717 MHz)  initial 2147557376  97%(84%/97%)  0%  0    12    37

The following example shows Dynamic Load Balancing:

Router# cable load-balance docsis-group fn 49 md c8/0/16 rf
Router#show cable load-balance docsis-group fn 49 md c8/0/16 rfch-util
Load for five secs: 42%/4%; one minute: 45%; five minutes: 50%
Time source is NTP, 22:33:50.525 CST Thu Feb 2 2023

Interface     Pstate    Pending-In Pending-Out Throughput(Kbps) Util   NBCM WBCM
Do8/0/16:0    up        No         No          15552             41%    0    7
Do8/0/16:1    NA        No         No          15592             41%    0    7
Do8/0/16:2    NA        No         No          15592             41%    0    7
Do8/0/16:3    NA        No         No          15593             41%    0    7
Do8/0/16:4    up        No         No          15554             41%    0    7
Do8/0/16:5    NA        No         No          15592             41%    0    7
Do8/0/16:6    NA        No         No          15591             41%    0    7
Do8/0/16:7    NA        No         No          15592             41%    0    7
Do8/0/16:8    initial   No         No          15554             41%    0    4
Do8/0/16:9    NA        No         No          15592             41%    0    4
Do8/0/16:10   NA        No         No          15592             41%    0    4
Do8/0/16:11   NA        No         No          15592             41%    0    4
Do8/0/16:12   initial   No         No          15555             41%    0    4
Do8/0/16:13   NA        No         No          15593             41%    0    4
Do8/0/16:14   NA        No         No          15592             41%    0    4
Do8/0/16:15   NA        No         No          15592             41%    0    4
Do8/0/16:16   up        No         No          15558             41%    0    8
Do8/0/16:17   NA        No         No          15601             41%    0    8
Do8/0/16:18   NA        No         No          15601             41%    0    8
Do8/0/16:19   NA        No         No          15602             41%    0    8
Do8/0/16:20   up        No         No          15557             41%    0    8
Do8/0/16:21   NA        No         No          15602             41%    0    8
Do8/0/16:22   NA        No         No          15602             41%    0    8
Do8/0/16:23   NA        No         No          15601             41%    0    8
Do8/0/16:24   up        No         No          15558             41%    0    10
Do8/0/16:25   NA        No         No          15602             41%    0    10
Do8/0/16:26   NA        No         No          15602             41%    0    10
Do8/0/16:27   NA        No         No          15601             41%    0    10
Do8/0/16:28   up        No         No          15558             41%    0    10
Do8/0/16:29   NA        No         No          15601             41%    0    10
Do8/0/16:30   NA        No         No          15601             41%    0    10
Do8/0/16:31   NA        No         No          15601             41%    0    10
Do8/0/16:32   initial   No         No          15558             41%    0    4
Do8/0/16:33   NA        No         No          15600             41%    0    4
Do8/0/16:34   NA        No         No          15601             41%    0    4
Do8/0/16:35   NA        No         No          15601             41%    0    4
Do8/0/16:36   initial   No         No          15558             41%    0    4
Do8/0/16:37   NA        No         No          15601             41%    0    4
Do8/0/16:38   NA        No         No          15601             41%    0    4
Do8/0/16:39   NA        No         No          15601             41%    0    4
Do8/0/16:40   initial   No         No          15557             41%    0    5
Do8/0/16:41   NA        No         No          15600             41%    0    5
Do8/0/16:42   NA        No         No          15600             41%    0    5
Do8/0/16:43   NA        No         No          15601             41%    0    5
Do8/0/16:44   up        No         No          15558             41%    0    5
Do8/0/16:45   NA        No         No          15601             41%    0    5
Do8/0/16:46   NA        No         No          15600             41%    0    5
Do8/0/16:47   NA        No         No          15600             41%    0    5
Do8/0/16:158  NA        No         No          243830            57%    0    8
Do8/0/16:159  NA        No         No          246994            57%    0    8
Do8/0/16:160  NA        No         No          0                  0%    0    0
Do8/0/16:161  NA        No         No          0                  0%    0    0
Average: 40.38
Variance: 73.575
Router#show cable load-balance docsis-group fn 49 md c8/0/16 load wideband
Load for five secs: 40%/12%; one minute: 45%; five minutes: 49%
Time source is NTP, 22:37:52.939 CST Thu Feb 2 2023
DOCSIS load-balancing wideband load
Interface     Size    Group      Throughput(Kbps)/bw(Mbps)    Avg-Util
Wi8/0/16:3    34      2147639344           951416/2113        63%
Wi8/0/16:4    8       2147639344                0/300         38%
Wi8/0/16:18   8       2147639344                0/300         33%
Wi8/0/16:19   8       2147639344                0/300         38%
Wi8/0/16:20   8       2147639344                0/300         33%
Wi8/0/16:21   34      2147639344           542868/2113        62%
Wi8/0/16:22   8       2147639344                0/300         38%
Wi8/0/16:23   34      2147639344           896826/2062        61%

Data Rate Unit Setting TLV

The service flow and ASF QoS parameters include a few 32-bit rates (Maximum Sustained Traffic Rate, Minimum Reserved Traffic Rate, Peak Traffic Rate, and Guaranteed Grant Rate). By default, the rates are in bits per second (bps). As the result, the rate configuration is capped at 4 Gbps. 4xOFDM BG supports a higher rate than 4Gbps.

The Data Rate Unit Setting TLV, [24/25/70/71].41, is introduced in the D31 spec. It applies to both Upstream and Downstream Service Flow or Aggregate Service Flow parameters. The value of the Data Rate Unit Setting TLV overwrites the default unit (bps) for all these rate TLVs of a flow and allows for their interpretation in units of bps (0), or kbps (1), or Mbps (2) or Gbps (3).

Starting with Cisco IOS XE Dublin 17.12.1z, Data Rate Unit Setting TLV is supported on downstream SF/ASF. It can be configured using a CM configuration file or SCN/AQP. Use the following commands to configure Data Rate Unit Setting:

  • cable service class 100 data-rate-unit data-rate . The range is 0–3. 0=bps, 1=kbps, 2=Mbps, 3=Gbps.

  • cable asf-qos-profile data-rate-unit data-rate . The range is 0–3. 0=bps, 1=kbps, 2=Mbps, 3=Gbps.

Channel Profile

A globally configured OFDM channel profile contains channel parameters, and the modulation or modulation profile associated with the control, NCP, and data profiles.

Each OFDM channel must specify an OFDM channel profile in its configuration.

Modulation Profile

A globally configured OFDM modulation profile assigns different modulations to ranges of sub-carriers, or lists of individual sub-carriers.

A modulation profile may be assigned to a control, NCP, or data profile in a channel profile.

OFDM Channel Exclusion Band

Ranges of frequencies can be excluded from all OFDM channels on a port using the ofdm-freq-excl-band command.

How to Configure OFDM Channel

Configuring OFDM Modulation Profile

To configure the OFDM modulation profile, follow the steps below: 

enable 
configure terminal 
cable downstream ofdm-modulation-profile id 
description text 
subcarrier-spacing value 
width value 
start-frequency value 
assign {modulation-default mod_prof_id | modulation mod_prof_id {list-subcarriers {freq-abs | freq-offset} value | range-subcarriers {freq-abs | freq-offset} value width value}}

Note

Subcarrier spacing must match the subcarrier spacing of each channel profile in which it is configured.

Verifying OFDM Modulation Profile Configuration

To display the OFDM modulation profile details, use the show cable ofdm-modulation-profiles command as shown in the example below: 

Router# show cable ofdm-modulation-profile 10

**** OFDM Modulation Profile Configuration ****

Prof  FFT  Width     Start-freq Modulations             
ID    KHz  Hz        Hz        
10    50   96000000  627000000  64   default 
                                512  freq-abs  709050000 width   12000000
                                2048 freq-abs  629000000 width    6000000

Profile Subcarrier Modulations
  Modulation: Start-freq-abs[start-sc] - End-freq-abs[end-sc] Width-freq[num-sc]
  64  : 572600000[   0] -  626950000[1087]    54400000[1088]
  64  : 627000000[1088] -  628950000[1127]     2000000[  40]
  2048: 629000000[1128] -  634950000[1247]     6000000[ 120]
  64  : 635000000[1248] -  709000000[2728]    74050000[1481]
  512 : 709050000[2729] -  721000000[2968]    12000000[ 240]
  64  : 721050000[2969] -  722950000[3007]     1950000[  39]
  64  : 723000000[3008] -  777350000[4095]    54400000[1088]

**** OFDM Modulation Profile Assigned Channel Profiles ****

Prof  Channel
ID    Profiles
10    30

To display the associations between OFDM modulation profiles and OFDM channel profiles, use the show cable ofdm-modulation-profile command with channel-profiles option as shown in the example below: 

Router# show cable ofdm-modulation-profile channel-profiles

**** OFDM Modulation Profile Assigned Channel Profiles ****

Prof  Channel
ID    Profiles
8     None
9     28
10    30
192   192

To display the OFDM modulation profile configurations, use the show cable ofdm-modulation-profile command with configuration option as shown in the example below: 

Router# show cable ofdm-modulation-profile configuration

**** OFDM Modulation Profile Configuration ****

Prof  FFT  Width     Start-freq Modulations              Description
ID    KHz  Hz        Hz                                  (Limited to 20)
8     50   192000000 NA         2048 default 
                                512  freq-off   48000000
                                     width      24000000
9     50   96000000  627000000  512  default             512-1k-4k           
                                1024 freq-abs  635000000
                                     width      74050000
                                4096 freq-abs  629000000
                                     width       6000000
10    50   96000000  627000000  64   default 
                                512  freq-abs  709050000
                                     width      12000000
                                2048 freq-abs  629000000
                                     width       6000000

Configuring OFDM Channel Profile

To configure the OFDM channel profile, follow the steps below: 

enable 
configure terminal 
cable downstream ofdm-chan-profile id 
description text 
cyclic-prefix value 
interleaver-depth value 
pilot-scaling value 
roll-off value 
subcarrier-spacing value 
profile-ncp modulation-default mod_prof_id 
profile-control {modulation-default mod_prof_id | modulation-profile mod_prof_id} 
profile-data channel_data_prof_id {modulation-default mod_prof_id | modulation-profile mod_prof_id}

Verifying OFDM Channel Profile Configuration

To display the OFDM channel profile details, use the show cable ofdm-chan-profiles command as shown in the example below: 

Router# show cable ofdm-chan-profile 20

**** OFDM Channel Profile Configuration ****

Prof  Cycl  Roll  FFT  Intr   Pilot  Modulation (D-Default, P-Profile)                    
ID    Prfx  Off   KHz  Depth  Scale  Cntrl   NCP     Data Profiles                         
                                                     1       2       3       4       5      
20    1024  128   50   16     48     D:1024  D:16    NA      NA      NA      NA      NA
**** OFDM Channel Profile Assigned Channels ****

Prof  Admin  Controller:channels
ID  
20    Up     3/0/1:158              3/0/2:158              3/0/3:158              3/0/5:158            
             3/0/6:158              3/0/7:158

To display the associations between OFDM channel profiles and OFDM channels, use the show cable ofdm-chan-profiles command with channels option as shown in the example below: 

Router# show cable ofdm-chan-profile channels

**** OFDM Channel Profile Assigned Channels ****

Prof  Admin  Controller:channels
ID  
20    Up     3/0/1:158              3/0/2:158              3/0/3:158              3/0/5:158            
             3/0/6:158              3/0/7:158            
30    Up     3/0/4:158            
101   Up     3/0/0:158

To display the OFDM channel profile configurations, use the show cable ofdm-chan-profiles command with configuration option as shown in the example below: 

Router# show cable ofdm-chan-profile configuration

**** OFDM Channel Profile Configuration ****

Prof  Cycl  Roll  FFT  Intr   Pilot  Modulation (D-Default, P-Profile)                      Description
ID    Prfx  Off   KHz  Depth  Scale  Cntrl   NCP     Data Profiles                          (Limited to 20)
                                                     1       2       3       4       5      
0     192   128   50   16     48     D:256   D:16    D:1024  NA      NA      NA      NA     System Profile 0    
1     192   128   50   16     48     D:256   D:16    D:1024  D:2048  D:512   NA      NA     System Profile 1    
20    1024  128   50   16     48     D:1024  D:16    NA      NA      NA      NA     NA    
30    1024  128   50   16     48     P:10    D:16    NA      NA      NA      NA      NA

Configuring OFDM Channel as Primary Channel

To configure an RF-channel in the mac-domain as an OFDM primary channel, use the following commands.
enable
configure terminal
interface cable <slot/subslot/port> downstream Integrated-Cable <slot/subslot/port> 
rf-channel <ofdm-channel-number: 158-162>
end

Verifying OFDM Primary Channel Configuration

To display the OFDM channel configuration details, where the OFDM channel is the primary channel, use the command as shown in the following example:
Router#sh run int c3/0/3
Building configuration...

Current configuration : 539 bytes
!
interface Cable3/0/3
 load-interval 30
 downstream Integrated-Cable 3/0/3 rf-channel 0
 downstream Integrated-Cable 3/0/3 rf-channel 158
 upstream 0 Upstream-Cable 3/0/6 us-channel 0
 upstream 1 Upstream-Cable 3/0/6 us-channel 1
 upstream 2 Upstream-Cable 3/0/6 us-channel 2
 upstream 3 Upstream-Cable 3/0/6 us-channel 3
 cable upstream bonding-group 1
  upstream 0
  upstream 1
  upstream 2
  upstream 3
  attributes 80000000
 cable bundle 1
 cable cm-status enable 3 6-11 16-18 20-27
 cable privacy accept-self-signed-certificate
end
You can also use the following command to display the OFDM primary channel configuration details as shown in this example. 
Router#sh cable mac-domain c3/0/3 cgd-associations 
CGD Host  Resource  DS Channels            Upstreams    (ALLUS)   Active DS
Ca3/0/3   3/0/3     0                      0-3          Yes        0
                    158                    0-3          Yes        158

The show cable mac-domain Cable <slot>/<subslot>/<port> mdd command also displays the OFDM primary channel configuration details as shown in the example. 

...
Downstream Active Channel List
        Channel ID:             159 
        Frequency:              836000000Hz
        Primary Capable:        Primary-Capable
        CM-STATUS Event Bitmask:0x36
                                MDD Timeout
                                QAM FEC failure
                                MDD Recovery
                                QAM FEC recovery
        MAP/UCD Transport Indicator:  Can carry MAPs and UCDs
        OFDM PLC Params Bitmask:  
               Tukey raised cosine window: 0.625
               Cyclic Prefix: 5.0
               Sub carrier spacing: 50

RF channels use a zero-based numbering scheme, whereas the downstream channel IDs are numbered starting from one. Thus RF channel 158 is equivalent to channel ID 159. The Channel ID in this example is 159. The MAP/UCD Transport Indicator shows that MAPs and UCDs are sent only on Primary Channels.

Configuring Port or Controller and Channel

To configure the port/controller and channel, use the following commands:

enable 
configure terminal 
controller integrated-cable slot/subslot/port 
max-ofdm-spectrum value 
ofdm-freq-excl-band start-frequency value width value 
rf-chan start_id [end_id] 
ofdm channel-profile id start-frequency value width value [plc value]

Note

The range of start_id is 158 to 162 in the OFDM channel configuration.

The maximum OFDM spectrum is assigned to OFDM channels, which is used by the the CMTS to calculate default port base power.

Ranges of frequencies can be excluded from all OFDM channels using the ofdm-freq-excl-band command.

Verifying Port/Controller and Channel Configuration

To display the RF port details, use the show controller integrated-cable command with rf-port option as shown in the example below: 

Router# show controller integrated-cable 3/0/0 rf-port

Admin:  UP  MaxCarrier: 128  BasePower: 33 dBmV  Mode: normal
  Rf Module 0: UP
  Free freq block list has 3 blocks:
    45000000  - 107999999
    624000000 - 644999999
    837000000 - 1217999999
  Rf Port Status: UP
  MaxOfdmSpectrum:  192000000   Equivalent 6MHz channels: 32        
  UsedOfdmSpectrum: 192000000   AvailOfdmSpectrum:        0         
  DefaultBasePower: 33 dBmV     Equivalent 6MHz channels: 160       
  OFDM frequency exclusion bands: None

To display the summary information on OFDM channel, use the show controller integrated-cable command with rf-channel option as shown in the example below: 

Router# show controller integrated-cable 3/0/0 rf-channel 158

Chan State Admin Mod-Type  Start       Width     PLC        Profile-ID    dcid  power  output
                           Frequency                                      
 158   UP   UP   OFDM      627000000   96000000  663000000       20       159   34     NORMAL

To display detailed information on OFDM channel, use the show controller integrated-cable command with rf-channel and verbose options as shown in the example below: 

Router# show controller integrated-cable 3/0/0 rf-channel 158 verbose

Chan State Admin Mod-Type  Start       Width     PLC        Profile-ID    dcid  power  output
                           Frequency                                      
 158   UP   UP   OFDM      627000000   96000000  663000000       30       159   32     NORMAL
 Resource status:   OK
 License: granted <17:02:35 EDT May 18 2016>
 OFDM channel license spectrum width: 92200000
 OFDM modulation license (spectrum width): 2K (6000000)
 OFDM config state: Configured

 OFDM channel details: [3/0/4:158]
------------------------------------------
 OFDM channel frequency/subcarrier range     : 627000000[1088] - 722999999[3007]
 OFDM spectrum frequency/subcarrier range    : 572600000[   0] - 777399999[4095]
 Active spectrum frequency/subcarrier range  : 628900000[1126] - 721049999[2969]
 OFDM channel center frequency/subcarrier    : 675000000[2048]
 PLC spectrum start frequency/subcarrier     : 663000000[1808]
 PLC frequency/subcarrier                    : 665800000[1864]
 Channel width                               : 96000000
 Active Channel width                        : 92200000
 OFDM Spectrum width                         : 204800000
 Chan prof id                                : 30
 Cyclic Prefix                               : 1024
 Roll off                                    : 128
 Interleave depth                            : 16
 Spacing                                     : 50KHZ
 Pilot Scaling                               : 48
 Control modulation profile                  : 10
 NCP modulation default                      : 16
 Data modulation default                     : None
 Data modulation profile                     : None
 Lower guardband width in freq/subcarriers   : 1900000[38]
 Upper guardband width in freq/subcarriers   : 1900000[38]
 Licensed 4K modulation spectrum width       : 0
 Licensed 2K modulation spectrum width       : 6000000
 
 PLC spectrum frequencies [subcarriers]              :
  663000000[1808] - 668999999[1927]   
          
 PLC channel frequencies [subcarriers]                 :
  665800000[1864] - 666199999[1871]   Size: 8 subcarriers
          
 Excluded frequencies [subcarriers]                :
  572600000[   0] - 628899999[1125]     721100000[2970] - 777399999[4095]   
  Count: 2252
          
 Pilot frequencies [subcarriers]                   :
  *:PLC pilots
  630700000[1162]   634300000[1234]   637900000[1306]   641500000[1378] 
  645100000[1450]   648700000[1522]   652300000[1594]   655900000[1666] 
  659500000[1738]   663450000[1817]*  664050000[1829]*  664600000[1840]*
  665050000[1849]*  666900000[1886]*  667350000[1895]*  667900000[1906]*
  668500000[1918]*  669100000[1930]   672700000[2002]   676300000[2074] 
  679900000[2146]   683500000[2218]   687100000[2290]   690700000[2362] 
  694300000[2434]   697900000[2506]   701500000[2578]   705100000[2650] 
  708700000[2722]   712300000[2794]   715900000[2866]   719500000[2938] 
  Count: 32

 Active frequencies [subcarriers]                  :
  628900000[1126] - 721099999[2969]   
  Count: 1844
          
 Data frequencies [subcarriers]                   :
  628900000[1126] - 630699999[1161]     630750000[1163] - 634299999[1233]   
  634350000[1235] - 637899999[1305]     637950000[1307] - 641499999[1377]   
  641550000[1379] - 645099999[1449]     645150000[1451] - 648699999[1521]   
  648750000[1523] - 652299999[1593]     652350000[1595] - 655899999[1665]   
  655950000[1667] - 659499999[1737]     659550000[1739] - 663449999[1816]   
  663500000[1818] - 664049999[1828]     664100000[1830] - 664599999[1839]   
  664650000[1841] - 665049999[1848]     665100000[1850] - 665799999[1863]   
  666200000[1872] - 666899999[1885]     666950000[1887] - 667349999[1894]   
  667400000[1896] - 667899999[1905]     667950000[1907] - 668499999[1917]   
  668550000[1919] - 669099999[1929]     669150000[1931] - 672699999[2001]   
  672750000[2003] - 676299999[2073]     676350000[2075] - 679899999[2145]   
  679950000[2147] - 683499999[2217]     683550000[2219] - 687099999[2289]   
  687150000[2291] - 690699999[2361]     690750000[2363] - 694299999[2433]   
  694350000[2435] - 697899999[2505]     697950000[2507] - 701499999[2577]   
  701550000[2579] - 705099999[2649]     705150000[2651] - 708699999[2721]   
  708750000[2723] - 712299999[2793]     712350000[2795] - 715899999[2865]   
  715950000[2867] - 719499999[2937]     719550000[2939] - 721099999[2969]   
  Count: 1804

 Profiles:
  Number of profiles: 2
  CTRL profile (Profile A): rate: 461916 kbps, usable rate: 368000 kbps
  Active frequencies [subcarriers]:
  Modulation:Start-freq[start-subcarrier] - End-freq[end-subcarrier]
  ------------------------------------------------------------------
  64   :628900000[1126] - 628950000[1127]     2048 :629000000[1128] - 630650000[1161]   
  2048 :630750000[1163] - 634250000[1233]     2048 :634350000[1235] - 634950000[1247]   
  64   :635000000[1248] - 637850000[1305]     64   :637950000[1307] - 641450000[1377]   
  64   :641550000[1379] - 645050000[1449]     64   :645150000[1451] - 648650000[1521]   
  64   :648750000[1523] - 652250000[1593]     64   :652350000[1595] - 655850000[1665]   
  64   :655950000[1667] - 659450000[1737]     64   :659550000[1739] - 663400000[1816]   
  64   :663500000[1818] - 664000000[1828]     64   :664100000[1830] - 664550000[1839]   
  64   :664650000[1841] - 665000000[1848]     64   :665100000[1850] - 665750000[1863]   
  64   :666200000[1872] - 666850000[1885]     64   :666950000[1887] - 667300000[1894]   
  64   :667400000[1896] - 667850000[1905]     64   :667950000[1907] - 668450000[1917]   
  64   :668550000[1919] - 669050000[1929]     64   :669150000[1931] - 672650000[2001]   
  64   :672750000[2003] - 676250000[2073]     64   :676350000[2075] - 679850000[2145]   
  64   :679950000[2147] - 683450000[2217]     64   :683550000[2219] - 687050000[2289]   
  64   :687150000[2291] - 690650000[2361]     64   :690750000[2363] - 694250000[2433]   
  64   :694350000[2435] - 697850000[2505]     64   :697950000[2507] - 701450000[2577]   
  64   :701550000[2579] - 705050000[2649]     64   :705150000[2651] - 708650000[2721]   
  64   :708750000[2723] - 709000000[2728]     512  :709050000[2729] - 712250000[2793]   
  512  :712350000[2795] - 715850000[2865]     512  :715950000[2867] - 719450000[2937]   
  512  :719550000[2939] - 721000000[2968]     64   :721050000[2969] - 721050000[2969]   
  Active subcarrier count: 1804, ZBL count: 0
  Discontinuity time [days:hours:mins:secs]: 00:00:54:32 [16:15:02 EDT May 18 2016]
          
  NCP profile:
  Active frequencies [subcarriers]:
  Modulation:Start-freq[start-subcarrier] - End-freq[end-subcarrier]
  ------------------------------------------------------------------
  16   :628900000[1126] - 630650000[1161]     16   :630750000[1163] - 634250000[1233]   
  16   :634350000[1235] - 637850000[1305]     16   :637950000[1307] - 641450000[1377]   
  16   :641550000[1379] - 645050000[1449]     16   :645150000[1451] - 648650000[1521]   
  16   :648750000[1523] - 652250000[1593]     16   :652350000[1595] - 655850000[1665]   
  16   :655950000[1667] - 659450000[1737]     16   :659550000[1739] - 663400000[1816]   
  16   :663500000[1818] - 664000000[1828]     16   :664100000[1830] - 664550000[1839]   
  16   :664650000[1841] - 665000000[1848]     16   :665100000[1850] - 665750000[1863]   
  16   :666200000[1872] - 666850000[1885]     16   :666950000[1887] - 667300000[1894]   
  16   :667400000[1896] - 667850000[1905]     16   :667950000[1907] - 668450000[1917]   
  16   :668550000[1919] - 669050000[1929]     16   :669150000[1931] - 672650000[2001]   
  16   :672750000[2003] - 676250000[2073]     16   :676350000[2075] - 679850000[2145]   
  16   :679950000[2147] - 683450000[2217]     16   :683550000[2219] - 687050000[2289]   
  16   :687150000[2291] - 690650000[2361]     16   :690750000[2363] - 694250000[2433]   
  16   :694350000[2435] - 697850000[2505]     16   :697950000[2507] - 701450000[2577]   
  16   :701550000[2579] - 705050000[2649]     16   :705150000[2651] - 708650000[2721]   
  16   :708750000[2723] - 712250000[2793]     16   :712350000[2795] - 715850000[2865]   
  16   :715950000[2867] - 719450000[2937]     16   :719550000[2939] - 721050000[2969]   
  Active subcarrier count: 1804, ZBL count: 0
          
 CCCs:
   OCD CCC: 2
   DPD CCCs:
     Control profile  (Profile A) CCC: 2
         NCP profile  CCC: 2
 Resource config time taken: 2286 msecs
 
 
JIB channel number: 776
Chan Pr EnqQ  Pipe  RAF   SyncTmr DqQ ChEn   RAF Pipe Phy0 Phy1 Tun# SessId 0[TkbRt MaxP]     1[TkbRt MaxP]
 776  0   384     1   725       0 384 0100 13032    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  1   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  2   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  3   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  4   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  5   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  6   384     1  4786       0 384 0100  2190    1    0    1    2      0 479610000 4485120 383688000 4485120
 776  7   384     1     0       0 384 0100     0    1    0    1    2      0 479610000 4485120 383688000 4485120

Chan   Qos-Hi   Qos-Lo    Med-Hi   Med-Lo    Low-Hi   Low-Lo
 776   368640   245760    368640   245760    614400   368640
Chan  Med Low TB-neg Qos_Exc  Med_Xof  Low_Xof  Qdrops(H-M-L)  Pos    Qlen(Hi-Med-lo) Fl Tgl_cnt Rdy_sts
  776   0   0      0       0        0        0    0    0    0  Y      0      0      0  0        0 ff
Chan       Rate   Neg   Pos    LastTS  CurrCr  Pos  [PLC Rate Neg Pos]
 776   10485750 65535 65535 116199669 268431360   Y [MM 86 128 1114][EM 87 128 6204][TR 2 9 3102]
DSPHY Info:
 Local rf port 0 , rf chan 158 pic loss 123
 non short CWs: = 235681130, shorts = 0, stuff bytes = 235639172 bch 235681130
 NCP msgs: = 453809753, PLC encodings = 16902476
 flow0 rcv 70203 flow1 rcv 3 flow0 drops 0 flow1 drops 0

Configuration Examples

This section provides examples for configuring the OFDM channel.

Example1: Configuring OFDM Channel


Note

The OFDM modulation profile must be configured before the OFDM channel profile which references it.

The following example shows how to configure the OFDM channel: 

enable 
configure terminal 
cable downstream ofdm-modulation-profile 9 
description 512-1k-4k 
subcarrier-spacing 50KHz 
width 96000000 
start-frequency 627000000 
assign modulation-default 512-QAM 
assign modulation 1024-QAM range-subcarriers freq-abs 635000000 width 74050000 
assign modulation 4096-QAM range-subcarriers freq-abs 629000000 width 6000000 
exit 
configure terminal 
cable downstream ofdm-chan-profile 20 
description Data profiles: 2 single mod, 1 mixed mod 
cyclic-prefix 192 
interleaver-depth 16 
pilot-scaling 48 
roll-off 128 
subcarrier-spacing 50KHz 
profile-ncp modulation-default 16-QAM 
profile-control modulation-default 256-QAM 
profile-data 1 modulation-default 1024-QAM 
profile-data 2 modulation-default 2048-QAM 
profile-data 3 modulation-profile 9 
exit 
configure terminal 
controller integrated-cable 3/0/0 
max-ofdm-spectrum 96000000 
ofdm-freq-excl-band start-frequency 683000000 width 10000000 
rf-chan 158 
power-adjust 0 
docsis-channel-id 159 
ofdm channel-profile 20 start-frequency 627000000 width 96000000 plc 663000000

Example 2: Configuring OFDM Primary Channel in the MAC Domain

enable 
configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
interface cable 3/0/0 
downstream Integrated-Cable 3/0/3 rf-channel 158  
end

Additional References

Related Document

Document Title

Link

Cisco cBR Converged Broadband Routers Layer 2 and DOCSIS 3.0 Configuration Guide

http://www.cisco.com/c/en/us/td/docs/cable/cbr/configuration/guide/b_cbr_layer2_docsis30.html

MIBs

MIBs

MIBs Link

DOCS-IF31-MIB

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/support

Feature Information for DOCSIS 3.1 OFDM Channel Configuration

Use Cisco Feature Navigator to find information about the platform support and software image support. Cisco Feature Navigator enables you to determine which software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to the https://cfnng.cisco.com/ link. An account on the Cisco.com page is not required.


Note

The following table lists the software release in which a given feature is introduced. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Table 3. Feature Information for DOCSIS 3.1 OFDM Channel Configuration

Feature Name

Releases

Feature Information

DOCSIS 3.1 OFDM Channel Support

Cisco IOS XE Fuji 16.7.1

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

Full Spectrum 108-1218 MHz Support

Cisco IOS XE Fuji 16.7.1

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

DOCSIS 3.1 OFDM Primary Channel Support

Cisco IOS XE Fuji 16.7.1

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

Enhanced support for subcarrier spacing, exclusion band, and LCPR

Cisco IOS XE Fuji 16.7.1

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

Hitless OFDM Profile Changes

Cisco IOS XE Everest 16.12.1x

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

Ephemeral Profile to Cable Modem Assignment

Cisco IOS XE Everest 16.12.1x

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.

Profile Management Application Scaling

Cisco IOS XE Everest 16.12.1z

This feature was integrated on the Cisco cBR Series Converged Broadband Routers.