Upstream Interface Configuration

This document describes how to configure the upstream interfaces on the Cisco cBR Series Converged Broadband Router.

Finding Feature Information

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http:/​/​tools.cisco.com/​ITDIT/​CFN/​. An account on http:/​/​www.cisco.com/​ is not required.

Hardware Compatibility Matrix for Cisco cBR Series Routers


Note

The hardware components 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 3.15.0S and Later Releases

Cisco cBR-8 Supervisor:

  • PID—CBR-CCAP-SUP-160G

  • PID—CBR-CCAP-SUP-60G1

  • PID—CBR-SUP-8X10G-PIC

Cisco IOS-XE Release 3.15.0S 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

Cisco cBR-8 Downstream PHY Modules:

  • PID—CBR-D30-DS-MOD

  • PID—CBR-D31-DS-MOD

Cisco cBR-8 Upstream PHY Modules:

  • PID—CBR-D30-US-MOD

1 Effective with Cisco IOS-XE Release 3.17.0S, CBR-CCAP-SUP-60G supports 8 cable line cards. The total traffic rate is limited to 60Gbps, the total number of downstream service flow is limited to 72268, and downstream unicast low-latency flow does not count against the limits.

Information About Upstream Interface Configuration

Upstream Channel Management

Upstream Channel Management (UCM) is responsible for the physical (PHY) layer configuration and resource management of upstream channels in the Cisco cBR Series Converged Broadband Router.

Upstream Controller

An upstream port represents a physical upstream RF connector on a cable line card, connected to one or more fiber nodes. An upstream RF port is a container of upstream RF channels, which imposes constraints on both topology and spectrum for the group of RF channels contained in the physical port. An upstream RF port also represents the RF front-end hardware component on a cable line card including the connector, variable gain adjustment (VGA), and A/D converter. This is directly connected to a set of upstream physical channel receivers. The number of upstream physical channels per port is thus constrained by the number of receivers accessible to the port.

Upstream Channel

An upstream RF channel represents DOCSIS physical layer operation on a single upstream center frequency with a particular channel width. It is contained by a single physical port on the CMTS line card hardware.

Upstream Resource Management

The upstream resource management (URM) feature is primarily responsible for the maintenance of the relationship between a physical upstream connector on the line card and the upstream RF channels received on that connector.

How to Configure Upstream Interfaces

This section contains the following:

Configuring the Cisco CMTS Manually Using Configuration Mode

Connect a console terminal to the console port on the I/O controller. When asked if you want to enter the initial dialog, answer no to go into the normal operating mode of the router. After a few seconds the user EXEC prompt (Router>) appears.

Configuring the Modulation Profile and Assigning to an Upstream Channel

Procedure

     Command or ActionPurpose
    Step 1enable


    Example: 
    Router> enable
     

    Enables privileged EXEC mode.

    Enter your password if prompted.

     
    Step 2configure terminal


    Example: 
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 cable modulation-profile profile mode_of_oper qam_profile


    Example: 
    Router(config)# cable modulation-profile 23 tdma qam-16
     

    Creates a preconfigured modulation profile, where the burst parameters are set to their default values for each burst type.

     
    Step 4 Controller Upstream-Cable slot/subslot/port


    Example: 
    Router(config)# Controller Upstream-Cable 7/0/0
     

    Enters the controller interface configuration mode.

     
    Step 5 us-channel n modulation-profile primary-profile-number [secondary-profile-number] [tertiary-profile-number]


    Example: 
    Router(config-if)#cable upstreamus-channel 0 modulation-profile 23
     

    Assigns up to three modulation profiles to an upstream port.

     
    Step 6 end


    Example: 
    Router(config-controller)# end
     

    Exits controller configuration submode and returns to privileged EXEC mode.

     

    Configuring the Upstream Channel with PHY Layer

    Procedure

       Command or ActionPurpose
      Step 1enable


      Example: 
      Router> enable
       

      Enables privileged EXEC mode.

      Enter your password if prompted.

       
      Step 2configure terminal


      Example: 
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 controller upstream-cable slot/subslot/port


      Example: 
      Router(config)# controller upstream-cable 1/0/0
       

      Specifies the controller interface line card and enters upstream controller config configuration submode.

       
      Step 4 us-channel rf-channel frequency freq-val


      Example: 
      Router(config-controller)# us-channel 1 frequency 20000000
       

      Assigns frequency to an RF channel on a controller interface.

       
      Step 5 us-channel rf-channel docsis-mode mode


      Example: 
      Router(config-controller)# us-channel 1 docsis-mode tdma
       

      Assigns DOCSIS mode to an RF channel on a controller interface.

       
      Step 6 us-channel rf-channel channel-width value


      Example: 
      Router(config-controller)# us-channel 1 channel-width 3200000
       

      Assigns channel width in Hertz to an RF channel on a controller interface.

       
      Step 7 us-channel rf-channel modulation-profile profile


      Example: 
      Router(config-controller)# us-channel 1 modulation-profile 21
       

      Assigns modulation profile to an RF channel on a controller interface.

       
      Step 8 no us-channel rf-channel shutdown


      Example: 
      Router(config-controller)# no us-channel 1 shutdown
       

      Enables the upstream channel.

       
      Step 9end


      Example: 
      Router(config-controller)# end
       

      Exits upstream controller configuration submode and returns to privileged EXEC mode.

       

      Associating Upstream Channels with a MAC Domain and Configuring Upstream Bonding

      Procedure

         Command or ActionPurpose
        Step 1enable


        Example: 
        Router> enable
         

        Enables privileged EXEC mode.

        Enter your password if prompted.

         
        Step 2configure terminal


        Example: 
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 interface cable slot/subslot/cable-interface-index


        Example: 
        Router(config)# interface cable 7/0/0
         

        Specifies the cable interface line card on a Cisco CMTS router.

         
        Step 4 downstream integrated-cable slot/subslot/port rf-channel rf-chan [upstream grouplist]


        Example: 
        Router(config-if)# downstream integrated-cable 7/0/0 rf-channel 3 upstream 3
         

        Associates a set of upstream channels to the integrated downstream channels.

         
        Step 5 upstream md-us-chan-id upstream-cable slot/subslot/port us-channel rf-channel


        Example: 
        Router(config-if)# upstream 0 upstream-cable 7/0/0 us-channel 0
         

        Associates a set of physical upstream channels with the Mac Domain.

         
        Step 6 cable upstream bonding-group id


        Example: 
        Router(config-if)# cable upstream bonding-group 200
         

        Creates the upstream bonding group on the specified cable interface and enters upstream bonding configuration submode.

         
        Step 7 upstream number


        Example: 
        Router(config-upstream-bonding)# upstream 1
         

        Adds an upstream channel to the upstream bonding group.

        Starting from Cisco IOS-XE 3.18.0S release, maximum of 16 upstream channels can be configured for each MAC Domain, which are divided into two groups:
        • Group 1: upstream channel 0-7
        • Group 2: upstream channel 8-15
        The upstream bonding-group should include all the upstream channels either from Group 1 or Group 2 only.
         
        Step 8 attributes value


        Example: 
        Router(config-upstream-bonding)# attributes eeeeeeee
         

        Modifies the attribute value for the specified upstream bonding group.

         
        Step 9end


        Example: 
        Router(config-upstream-bonding)# end
         

        Exits upstream bonding configuration submode and returns to privileged EXEC mode.

         

        Configuration Examples

        Upstream Channel with PHY Layer Configuration Example

        ...
us-channel 0 frequency 20000000
us-channel 0 channel-width 3200000 3200000
us-channel 0 power-level 0
us-channel 0 docsis-mode tdma
us-channel 0 minislot-size 2
us-channel 0 modulation-profile 21
no us-channel 0 shutdown
...

        Upstream Channels with a MAC Domain Configuration Example

        ...
interface Cable8/0/0
downstream Modular-Cable 8/0/0 rf-channel 0 
upstream 0 Upstream-Cable 8/0/0 us-channel 0
upstream 1 Upstream-Cable 8/0/0 us-channel 1
cable mtc-mode
cable upstream bonding-group 1
  upstream 0
  upstream 1	
  attributes 80000000

...

        Additional References

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        Feature Information for Upstream Interface Configuration on the Cisco cBR Router

        Use Cisco Feature Navigator to find information about 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 http:/​/​tools.cisco.com/​ITDIT/​CFN/​. An account on http:/​/​www.cisco.com/​ is not required.


        Note

        The below table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

        Table 2 Feature Information for Upstream Interface Configuration

        Feature Name

        Releases

        Feature Information

        Upstream Interface Configuration

        Cisco IOS-XE 3.15.0S

        This feature was introduced on the Cisco cBR Series Converged Broadband Router.