Service Distribution Group

The Service Distribution Group (SDG) is a collection of one or more RF ports and defines the physical slot/bay/port to be used in a video service.

Contents

Information About Service Distribution Group

The following are the required components for configuring an SDG:

  • Multiple Ports—Multiple ports in an SDG replicate all QAMs from the Virtual Carrier Group (VCG) to every port.

  • Unicast—Unicast (VoD) services cannot be replicated across line cards.

  • TSID—The TSIDs should always be unique (North American MSO). Non-unique TSIDs can be used if the ONID is changed from the default value of zero (0).

The convention slot/bay/port represents the following:

  • Slot—Slot is the line card slot number. Slot can be configured 0–3 or 6–9. Slots 4 and 5 are the supervisor slots.

  • Bay—Bay is the Cisco cBR-8 chassis number. This parameter is always configured as 0.

  • Port—Port is the RF port number. This parameter can be configured 1–8.


Note

  • For a Remote PHY line card, the SDG does not describe a collection of RF ports. SDG specifies the line card, bay, and downstream cable controller where the video will be destined. Use rpd downstream-cable slot/bay/controller command instead of rf-port integrated-cable slot/bay/port command. Only one downstream cable controller can be specified for an SDG, so QAM replication is not supported. (However, the controller can be multicast to multiple remote PHY devices which is similar to QAM replication but occurs external to the cBR-8.)

  • Cisco Remote PHY Device 1x2 can join up to 30 multicast streams simultaneously for video.

  • Cisco HA Shelf can join up to 30 multicast streams simultaneously per RPD for video.

How to Configure the Service Distribution Group

This section describes how to configure SDGs for the video session on Cisco cBR-8.

Defining the Physical Slot/Bay/Port

To define the Service Distribution Group (SDG), you must define the physical slot/bay/port to be used in a video service.

Before You Begin

Make sure that the controller type is video for the slot/bay/port that you use for the SDG. Errors due to the incorrect controller type used in the SDG appear during the bind operation.

To define the physical slot/bay/port , complete the following procedure: 

configure terminal 
cable video 
service-distribution-group sdg name 
rf-port integrated-cable slot/bay/port

Configuring QAM Replication

To configure QAM replication for service group size alignment between the DOCSIS and video services to one or more ports, you can add more ports into the service distribution group configuration.

Before You Begin

Make sure that the controller type is video for the slot/bay/port that you would use for the SDG. For more information, see the Video QAM Carriers section. Errors due to the incorrect controller type used in the SDG appear during the bind operation.

To configure QAM replication, complete the following procedure: 

configure terminal 
cable video 
service-distribution-group service distribution group name 
rf-port  integrated-cable  slot/bay/port 
rf-port  integrated-cable  slot/bay/port

Overriding the Default ONID

You can override the default ONID, by defining a new ONID value in the SDG configuration. If you perform this configuration, all channels associated with the configured SDG will have the new ONID value. By default, the system ONID is 0, which is commonly used in North America.

To override the default ONID, complete the following procedure: 

configure terminal 
cable video 
service-distribution-group service distribution group name 
onid onid number

Overriding the Default PSI Value

To override the default PSI value, complete the following procedure: 

configure terminal 
cable video 
service-distribution-group  service distribution group name 
psi-interval psi-interval  msec

Verifying Service Distribution Group Configuration

To verify the SDG configuration, use the show cable video service-distribution-group command as shown in the example below: 


Router# show cable video service-distribution-group all
Number of Service Distribution Groups: 1
ID Name   Virtual-Carrier-Group  Logical-Edge-Device RF-Port  ONID   PSI       Serving
          Name                   Name                                Interval  Area 
-----------------------------------------------------------------------------------------
1  sdg1   vcg1                   table-based         9/0/0    0      100       10


Router# show cable video service-distribution-group id 1
Name:  sdg1
       Id:  1
      ONID:  0
      PSI Interval:  100
      Serving Area:  10

      RF Ports:
          Integrated-Cable 9/0/0

      Number of Virtual Carrier Groups:  1
      VCG ID         VCG Name               LED ID      LED Name
      ----------------------------------------------------------------------
      1              vcg 1                  1           table-based

Troubleshooting Tips

To undo any configuration, use the no form of the command. This command is useful if you have configured something by mistake. The errors are not apparent until you perform the bind operation.

Configuration Examples

This section provides example configurations for the service distribution group.

Configuring a Service Distribution Group 

configure terminal 
cable video 
service-distribution-group vod id 1  
 onid 100 
 rf-port integrated-cable 7/0/0 
 rf-port integrated-cable 7/0/1 
 rf-port integrated-cable 7/0/2 
 rf-port integrated-cable 7/0/3

Feature Information for Service Distribution Group

Table 1. Feature Information for Service Distribution Group

Feature Name

Releases

Feature Information

Service Distribution Group

Cisco IOS XE Everest 16.6.1

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

SDT

Cisco IOS XE Gibraltar 16.10.1c

Thisfeature was introduced on the Cisco cBR Series Converged Broadband Routers.