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Configuring the Cisco RFGW-10 DS-384 Line Card

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Configuring the Cisco RFGW-10 DS-384 Line Card

Contents

Configuring the Cisco RFGW-10 DS-384 Line Card

Effective with Cisco IOS-XE Release 3.2.0SQ, the Cisco RF Gateway 10 (Cisco RFGW-10) chassis supports the Cisco RF Gateway 10 Universal Edge Quadrature Amplitude Modulation (UEQAM) Downstream 384 line card (hereafter called the Cisco RFGW-10 DS-384 line card). This card supports up to 8 RF ports and up to 384 QAM carriers on each line card.

Prerequisites for Configuring QAM Features for the Cisco RFGW-10 DS-384 Line Card

The Cisco RFGW-10 DS-384 line card requires that the Cisco RF Gateway 10 and Cisco RF Gateway 10 Supervisor Engine 7-E are running the Cisco IOS-XE Release 3.2.0SQ.

The Cisco RF Gateway 10 Supervisor Engine 7-E supports superior capabilities like greater switching capacity (848 Gbps) and throughput (250 Mbps), external Secure Data (SD) and USB card for flexible storage options and four non-blocking 10 Gigabit Ethernet uplinks. For detailed information on the Cisco RF Gateway 10 Supervisor Engine 7-E, see the Cisco RF Gateway 10 Hardware Installation Guide.

Restrictions for Configuring QAM Features for the Cisco RFGW-10 DS-384 Line Card

  • Due to the limitation of the upconverter module, only 96 channels per port for Annex A are supported for the Cisco RFGW-10 DS-384 line card.
  • Because the number of ports supported in the Cisco RFGW-10 DS-48 line card are different from the Cisco RFGW-10 DS-384 line card, the configuration for one type of line card cannot be applied to a different type of line card. When the Supervisor card detects that a different type of line card has replaced an existing line card, the existing configuration is erased. The default setting of the new line card must be reconfigured.

Information About Configuring QAM Features for the Cisco RFGW-10 DS-384 Line Card

The Cisco RFGW-10 DS-384 line card (see the figure below for software key components of the line card) is a high-density card and has the following features:

Figure 1. Physical QAM Layout and Logical QAM Grouping on the Cisco RFGW-10 DS-384 Line Card



  • Maximum of eight RF ports on every line card are supported.
  • QAM carriers can be grouped on any port as long as the total number of QAM carriers is less than 384. Maximum of 128 carriers per port are supported on a QAM port or physical RF port.
  • The frequency range per port can be configured into maximum of four lanes, with four blocks on every lane. Each block can have 8 carriers, that is, 32 carriers on every lane. The frequency assigned to a carrier can begin on any lane and must be within the frequency range of 216 MHz.

    Note


    The frequency assignments and the block and lane association must be relayed to the line card.


  • Carrier spacing of +/- 6 MHz is supported for Annex B and C, and +/- 8MHz for only Annex A.
  • A logical QAM (LQAM) channel is a single RF carrier.
  • An LQAM group is a group of eight LQAM channels that share the same RF parameters—Annex, modulation format, symbol rate, and ITU interleaver values— in the RF profile. There can be up to 48 LQAM groups in Cisco RFGW-10 DS-384 line card.

For information on configuring features on the Cisco RFGW-10 DS-384 line card, see:

QAM Replication

QAM Replication feature allows users to replicate a single QAM output from one port to another port on a Cisco RFGW-10 DS-384 line card from the Supervisor card. It supports replication only within a given line card. Replicated QAM output uses the downstream span licensing policy that allows additional downstream outputs using RF Spanning. The RF spanning feature allows replication of existing downstream output to other ports on the same line card.

A QAM Replication Group (QRG) contains information about a single source QAM and its corresponding replicated copy or copies. A QRG contains only one pilot and a minimum of one and maximum of seven replicate QAMs. Each group is numbered with an identifier and contains the slot, port and channel number for both the source QAM (pilot-qam) and the destination QAM or QAMs (replicate-qam).

An interface, by default, does not belong to any replication group. After it is added to a replication group as a pilot QAM, any change made to it impacts the replicates associated with it. Hence, the pilot QAM must be removed from the replication group before applying any configuration change to it. The only configuration allowed on the pilot QAM in a replication group is RF shutdown. Shut and unshut of the pilot QAM is allowed and the same is reflected on all the replicates associated with that pilot QAM.

Each replicate QAM inherits all the attributes of its pilot QAM, except the port number, carrier-id, and channel number. If RF power level is not configured on the replicate QAM, and the pilot QAM RF power level is in the acceptable range for the replicate QAM, the pilot QAM RF power level value is inherited by the replicate. The max-carriers value must be specified for the replicate QAM. Replicate QAMs are configured at the qam-replication-group level and not at the interface level. No interface level changes are accepted for a replicate.


Note


An entire port can not be replicated except by replicating each QAM individually.


Port Density

Port density is the maximum number of carriers assigned to a port.

When the Cisco RFGW-10 DS-384 line card is inserted in the chassis, information about all physical port interfaces on that line card is automatically created in the configuration file. However, all port interfaces are in shutdown mode and by default, there are no carriers under a port interface.

How to Configure the QAM Features for the Cisco RFGW-10 DS-384 Line Card

This section describes the various steps to configure the QAM features on the Cisco RFGW-10 DS-384 Line Card.

Configuring the Port Density

This section describes the procedure to configure carriers on each RF port interface.


Note


When port density is defined, RF power is automatically defined at the port level.


Restrictions

  • 1, 2, 4 and multiples of 4 carriers can be specified on an RF port. However, each RF port on a Cisco RF GW-10 DS-384 line card can have only up to a maximum of 128 carriers configured.
  • While configuring RF port density, RF output from an integrated upconverter is temporarily disabled.
  • QAM carrier subinterfaces under an RF port can be accessed until the maximum number of carriers are specified.
  • Modification of the number of QAM carriers on a port affects RF power levels on the existing QAM carriers, that is, if the port density is reduced, QAM carriers on the higher subinterface ID are deleted. For example, if there are 100 carriers on qam 3/1 (qam 3/1.1 up to qam 3/1.100), and the port density is reduced to 60, then qam subinterfaces, qam 3/1.61 up to qam 3/1.100, are deleted.
SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    interface qam slot/port

    4.    cable downstream max-carriers carriers

    5.    exit


DETAILED STEPS
      Command or Action Purpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    Enter your password if prompted.

     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 interface qam slot/port


    Example:
    Router(config)# interface qam 3/1
     

    Configures the interface QAM on the line card.

    • slot—Slot of the line card in the QAM interface. The valid range is from 3 to 12.
    • port—Port on the specified slot. The valid range is from 1 to 8.

    Enters the QAM port interface configuration mode when executed.

     
    Step 4 cable downstream max-carriers carriers


    Example:
    Router(config-if)# cable downstream max-carriers 64
     

    Creates a specific number of QAM carriers on an RF port.

    • carriers—Number of carriers per port. The valid values are 1, 2, 4, and up to 64 in multiples of 4. The default value is 64.
     
    Step 5 exit


    Example:
    Router(config-if)# exit
     

    Exits the interface configuration mode.

     

    When the above commands are run, the Supervisor card creates the specified number of carrier subinterfaces starting from 1.


    Note


    If QAM interfaces already exist on the port, they are reconfigured when the new port density is specified. If the port density is lowered, QAM carriers with higher subinterface IDs are removed.


    The following example shows how to set the port density to 64 for port 1 on line card in slot 3:

    Router> enable
    Router# configure terminal
    Router(config)# interface qam 3/1
    Router(config-if)# cable downstream max-carriers 64
    Router(config-if)# exit
    

    User Scenario

    To set up the same number of carriers across all the ports for a line card:

    Router> enable
    Router# configure terminal
    Router(config)# interface qam 3/1 - 8
    Router(config-if)# cable downstream max-carriers 48
    Router(config-if)# exit
    

    Configuring RF Profiles

    The Cisco RFGW-10 DS-384 line card supports RF profiles. RF profiles are global templates that define a combination of RF attributes to be used across all line cards in the chassis. A default RF profile is generated by the system with the default RF attributes.

    An RF profile consists of:

    • Annex mode
    • Single symbol rate (applicable for Annex A only. Symbol rates are internally applied for Annex B and Annex C).
    • Single modulation index
    • Two interleaver depths. Each carrier must use only one defined interleaver depths of the profile it is assigned to.

    A group of eight logical QAM channels that share the same modulation format, symbol rate, annex mode, and the two options of interleaver I/J values, form a logical QAM group.

    An RF profile has the following characteristics:

    • Any number of carriers can be assigned to an RF profile within the RF Gateway 10 chassis.
    • 1, 2, 4 or multiples of 4 carriers can be associated with any RF port on that line card (maximum carriers on an RF port is 64).
    • Every physical QAM carrier has a one-to-one mapping with a logical QAM channel.

      Note


      Logical QAM channels correspond to physical QAM carriers and are assigned to the carriers when they are enabled.


    An RF profile enables several QAM carriers to share the same RF downstream parameters regardless of their RF port or logical QAM group. The Cisco RF Gateway 10 Supervisor Engine 7-E maintains the RF profile and assigns it to the QAM carriers, providing them with a logical QAM ID and a logical QAM group ID. If the RF profile is applied to more than eight QAM carriers, the Supervisor increments the logical QAM group ID.

    Restrictions

    • The Cisco RF Gateway 10 Supervisor Engine 7-E card must assign carriers to RF profiles in groups of eight. All eight carriers must have the same Annex, symbol rate, QAM modulation, and choice of two interleaver depth values. This grouping makes certain configurations on the Cisco RFGW-10 DS-384 line card, such as 380 carriers with RF profile 1, and 4 carriers with RF profile 2, invalid.
    • After it is created, all changes to the RF profile must be made at the RF Gateway 10 chassis level and not at the QAM subinterface level. It is recommended that global RF profiles are modified while they are not in use at the QAM subinterface level.
    • A default RF profile (default-rf-profile) is created during system boot up. Any QAM carrier that is enabled without an RF profile and center frequency assigned to it is rejected by the system. In this case, the default-rf-profile is enforced and assigned an RF profile ID of 1.
    • For Downstream External PHY Interface (DEPI) configuration, RF parameters can be configured either from the RF Gateway 10 chassis or all RF configurations can be learned from the Cisco CMTS. In DEPI Learn Mode, a new remote RF profile is created by the system, which cannot be modified at the RF Gateway 10 chassis level. In this case, use the show controller command to view the downstream parameters applied to the QAM carrier. The show cable rf-profile command lists all remote RF profiles that are automatically created on the RF Gateway 10 chassis.
    • Annex type is configured as part of the RF profile and different RF profiles for QAMs, can be applied under the same port. So, QAMs under the same port can be configured with different Annex types.
    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    cable downstream rf-profile rf-profile-id

      4.    cable downstream annex {A | B | C}

      5.    cable downstream modulation {64 | 256}

      6.    cable downstream interleaver-depth option1 depth-value option2 depth-value

      7.    cable downstream symbol-rate symbols

      8.    exit


    DETAILED STEPS
        Command or Action Purpose
      Step 1 enable


      Example:
      Router> enable
       

      Enables privileged EXEC mode.

      Enter your password if prompted.

       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 cable downstream rf-profile rf-profile-id


      Example:
      Router(config)# cable downstream rf-profile 1
       

      Creates a locally-defined RF profile at the Cisco RFGW-10 chassis level, and applies it across any QAM channel on the Cisco RFGW-10 DS-384 line card.

      • rf-profile-id—RF profile ID applied to the QAM channel on the line card.
       
      Step 4 cable downstream annex {A | B | C}


      Example:
      Router(config-rf-prof)# cable downstream annex A
       

      Sets the Moving Picture Experts Group (MPEG) framing format for a downstream port on a cable interface line card to Annex A (Europe), Annex B (North America), or Annex C (Japan).

      • A—Annex A: The downstream uses the EuroDOCSIS J.112 standard.
      • B—Annex B: The DOCSIS-compliant cable plants that support North American channel uses ITU J.83 Annex B downstream radio frequency.
      • C—Annex C: A variant of DOCSIS 1.1 designed to operate in Japanese cable systems.
       
      Step 5 cable downstream modulation {64 | 256}


      Example:
      Router(config-rf-prof)# cable downstream modulation 64
       

      Sets the modulation format for a downstream port on a line card.

      • 64—Modulation rate is 6 bits per downstream symbol.
      • 256—Modulation rate is 8 bits per downstream symbol.
       
      Step 6 cable downstream interleaver-depth option1 depth-value option2 depth-value


      Example:
      Router(config-rf-prof)# cable downstream interleaver depth option1 I12-J17 option2 I12-J17
       

      Sets the downstream interleaver depth.

      • option1—Interleaver-depth FEC I/J values at the RF profile.
      • option2—Interleaver-depth FEC I/J values that are available at the subinterface level when the profile in assigned to the QAM subinterface.
       
      Step 7 cable downstream symbol-rate symbols


      Example:
      Router(config-rf-prof)# cable downstream symbol-rate 3500000
       

      Sets the symbol rate on the line card.

      • symbols—Symbol rate of the line card in seconds. The valid range is from 3500000 to 7000000 symbols per second.
        Note   

        Symbol rate can be specified only for Annex A and Annex C and valid symbol rate values must be in increments of 1000 symbols per second.

       
      Step 8 exit


      Example:
      Router(config-rf-prof)# exit
       

      Exits the RF profile configuration mode.

       

      The following example shows how to configure an RF profile on the line card:

      Router> enable
      Router# configure terminal
      Router(config)# cable downstream rf-profile 1
      Router(config-rf-prof)# cable downstream annex A
      Router(config-rf-prof)# cable downstream modulation 64
      Router(config-rf-prof)# cable downstream interleaver depth option1 I12-J17 option2 I12-J17
      Router(config-rf-prof)# cable downstream symbol-rate 3500000
      Router(config-rf-prof)# exit
      
      What to Do Next

      After the RF profile is created, you can apply this profile to up to eight QAM carriers. You must also apply the interleaver value to the QAM carrier. This value must be one of the two interleaver depth values defined in the RF profile.

      The following example shows how to apply the RF profile to a QAM carrier:

      Router> enable
      Router# configure terminal
      Router(config)# interface Qam-red 3/1.1
      Router(config-subif)# cable downstream rf-profile 1
      Router(config-rf-prof)# cable downstream interleaver-depth I12-J17
      

      In the DEPI Learn RF mode, use the show cable rf-profile command to display the parameters in the RF profile learned from the Cisco CMTS.

      Router# show cable rf-profile 1
      
      RF Profile ID 1 is configured
              modulation: 256
              interleaver-depth options: I128-J1, I128-J1
              srate: 5056941
              remote: 0

      Use the show cable linecard logical-qamid-mapping command to display the logical QAM group IDs and QAM carriers mapped to the RF profiles on the line card:

      Router# show cable linecard logical-qamid-mapping 3
      
      Slot: 3, Logical QAM Group ID 1:
              RF Profile ID : Remote-RF-Profile-14
              First Port    : Qam-red3/1
              Associated Qam Carrier ids:
                      offset 0 - carrier-id 1 - Qam-red3/1.1
                      offset 1 - carrier-id 2 - Qam-red3/1.2
                      offset 2 - carrier-id 3 - Qam-red3/1.3
                      offset 3 - carrier-id 4 - Qam-red3/1.4
              Second Port   : Qam-red3/2
                      offset 4 - carrier-id 5 - Qam-red3/2.1
                      offset 5 - carrier-id 6 - Qam-red3/2.2
                      offset 6 - carrier-id 18 - Qam-red3/2.14
                      offset 7 - carrier-id 19 - Qam-red3/2.15
      Slot: 3, Logical QAM Group ID 2:
              First Port    : Qam-red3/2
              Associated Qam Carrier ids:
                      offset 0 - carrier-id 22 - Qam-red3/2.18
                      offset 1 - carrier-id 23 - Qam-red3/2.19
                      offset 2 - carrier-id 24 - Qam-red3/2.20
                      offset 3 - carrier-id 25 - Qam-red3/2.21
              Second Port   : Qam-red3/2
                      offset 4 - carrier-id 26 - Qam-red3/2.22
                      offset 5 - carrier-id 27 - Qam-red3/2.23
                      offset 6 - carrier-id 28 - Qam-red3/2.24
                      offset 7 - carrier-id 9 - Qam-red3/2.5
      Slot: 3, Logical QAM Group ID 3:
              First Port    : Qam-red3/3
              Associated Qam Carrier ids:
                      offset 0 - carrier-id 29 - Qam-red3/3.1
                      offset 1 - carrier-id 30 - Qam-red3/3.2
                      offset 2 - carrier-id 31 - Qam-red3/3.3
                      offset 3 - carrier-id 32 - Qam-red3/3.4
              Second Port   : None
      

      Configuring Logical QAM Group Assignment

      An RF profile assigned to a logical QAM (LQAM) group applies the same RF parameters, (Annex, modulation format, symbol rate, and the ITU interleaver pair value) to all LQAM channels in that group.


      Note


      When using remote DEPI, use only one interleaver value—fec_i. For manual DEPI, use the interleaver pair values—fec_i and fec_j for RF profiles.


      On the Cisco RFGW-10 DS-384 line card, you can configure LQAM group for each QAM channel.

      When there is a mismatch between the RF parameters of one QAM channel with the other QAM channels within the same LQAM group:

      • The mismatched channel goes into Idle state; the other channels remain operational.
      • If the mismatch is intentional, it is recommended to move the mismatched QAM channel to another LQAM group.

      Restrictions

      • No more than eight QAM channels can belong to an LQAM group.
      • No more than two QAM ports can belong to an LQAM group.

      If an LQAM group is not assigned:

      • DEPI session cannot be configured.
      • The depi-tunnel and cable downstream rf-profile commands cannot be executed.
      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    interface qam slot/port.[channel]

        4.    cable downstream lqam-group group_ID

        5.    exit


      DETAILED STEPS
          Command or Action Purpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        Enter your password if prompted.

         
        Step 2 configure terminal


        Example:
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 interface qam slot/port.[channel]


        Example:
        Router(config)# interface qam 3/1.1
         

        Configures the interface QAM on the line card.

        • slot—Slot of the line card in the QAM interface. The valid range is from 3 to 12.
        • port—Port on the specified slot. The valid range is from 1 to 8.
        • channel—(Optional) Channel on the specified port. The valid range is from 1 to 128. Enters the QAM subinterface configuration mode when executed.
         
        Step 4 cable downstream lqam-group group_ID


        Example:
        Router(config-subif)# cable downstream lqam 1
         

        Configures an LQAM group.

        • group_ID—LQAM group ID on QAM interface on the line card. The valid values range is from 1 to 48.
         
        Step 5 exit


        Example:
        Router(config-subif)# exit
         

        Exits the QAM subinterface configuration mode.

         

        Use the show running-config | include cable downstream lqam-group command to view the LQAM channels that belong to the same LQAM group.

        Router# show running-config | include cable downstream lqam-group
        
        Interface qam4/2.1
          cable downstream carrier-id 1
          cable downstream lqam-group 40
          cable mode depi remote learn
          cable downstream tsid 42001
          cable depi depi-tunnel tunnel-1
        Interface qam4/2.2
          cable downstream carrier-id 2 
          cable downstream lqam-group 25
          cable mode depi remote learn
          cable downstream tsid 42002
          cable depi depi-tunnel tunnel-1
        Interface qam4/2.3
          cable downstream carrier-id 3
          cable downstream lqam-group 40
          cable mode depi remote learn
          cable downstream tsid 42003
          cable depi depi-tunnel tunnel-1
        Interface qam4/5.4
          cable downstream carrier-id 13
          cable downstream lqam-group 40
          cable mode depi remote learn
          cable downstream tsid 42004
          cable depi depi-tunnel tunnel-1
        

        The above output indicates the LQAM channel 4/2.2 belongs to a different LQAM group.

        Configuring Frequency Profiles and QAM Carrier Frequency

        On the RFGW-10 DS-384 line card, frequency stacking can be achieved by grouping QAM carriers on a port.

        On an RFGW-10 DS-384 line card, each port provides a frequency range of 45 MHz to 1003 MHz. Carriers on a port are not forced to be stacked contiguously and any given carrier can occupy any part of the frequency spectrum on that port.

        Figure 2. Frequency Profiles - Lane and Block Concept



        The upconverter (UPX) on the RFGW-10 DS-384 line card provides greater frequency band range and more flexible carrier stacking schemes on each RF port. The frequency range is configured into maximum four lanes, with four blocks on every lane.

        Each block can have eight carriers of type Annex B or Annex C, that is, 32 carriers on every lane. For Annex A each block can have six carriers, or 24 carriers on every lane. The frequency assigned to a carrier can begin on any lane, but must be within the frequency band of 216 MHz.

        The Cisco RF Gateway 10 Supervisor Engine 7-E supports two frequency schemes—Static Frequency scheme and the User-defined Frequency scheme to configure the frequency profile at the port level.

        A starting frequency can be configured at the port level (static frequency scheme) or a frequency profile ID can be configured at the port level (user-defined frequency scheme). The valid values for starting frequency is from 45 MHz to 995 MHz.

        The Static frequency scheme hides the lane and block implementation of the UPX and the Cisco IOS image calculates the start frequencies of the lanes and blocks based on the start frequency specified at the port.

        The user-defined frequency scheme provides more flexibility to the user to define each lane and block start frequencies through global frequency profiles. These frequency profiles can then be applied to the port in this scheme.


        Note


        Frequency stacking cannot be configured on the RFGW-10 DS-48 line card; it is statically defined—four QAMs on every port.


        Restrictions

        • Number of QAM carriers configured on a port depends on the Annex value—128 QAM carriers for Annex B and 96 QAM carriers in Annex A.
        • Each block is 54 MHz wide and supports only up to a maximum of eight carriers of type Annex B or Annex C. For Annex A, the block supports a maximum of six carriers.
        • Each lane is 216 MHz wide. Block and lane overlaps are allowed in order to stack QAM carriers continuously. However, frequencies on each QAM carrier must not overlap on two different blocks.

          Note


          A group of eight logical QAM channels with the same Annex type, modulation format, and symbol rate is called a logical QAM group. Logical and physical channel have a one-to-one mapping, and hence, a QAM carrier is represented as both, physical and logical channel.


        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    interface qam slot/port.[channel]

          4.    cable downstream frequency qam-center-frequency

          5.    exit


        DETAILED STEPS
            Command or Action Purpose
          Step 1 enable


          Example:
          Router> enable
           

          Enables privileged EXEC mode.

          Enter your password if prompted.

           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters global configuration mode.

           
          Step 3 interface qam slot/port.[channel]


          Example:
          Router(config)# interface qam 3/1.1
           

          Configures the interface QAM on the line card.

          • slot—Slot of the line card in the QAM interface. The valid range is from 3 to 12.
          • port—Port on the specified slot. The valid range is from 1 to 8.
          • channel—(Optional) Channel on the specified port. The valid range is from 1 to 128. Enters the QAM subinterface configuration mode when executed.
           
          Step 4 cable downstream frequency qam-center-frequency


          Example:
          Router(config-subif)# cable downstream frequency 714000000
           

          Sets the downstream center frequency on the QAM channel.

          • qam-center-frequency—Center frequency on the QAM subinterface of the Cisco RFGW10-DS-384 line card. The valid range is from 48 MHz to 999 MHz.
           
          Step 5 exit


          Example:
          Router(config-subif)# exit
           

          Exits the QAM subinterface configuration mode.

           

          EXAMPLE

          The following examples shows how to configure the frequency profile and the center frequency on the QAM interface:

          Router> enable
          Router# configure terminal
          Router(config)# interface qam 3/1.1
          Router(config-subif)# cable downstream frequency 714000000

          Configuring Static Frequency Scheme

          The static frequency scheme preallocates lanes based on the starting frequency (fstart) of the port. The Supervisor card internally sets up fstart for all four lanes and blocks contiguously with the maximum frequency of up to 1003 MHz. The carrier frequency for each carrier can be placed anywhere starting with fstart.

          After a frequency for a carrier is accepted, the segment of that frequency range is marked "in-use" for that carrier.

          By default, fstart values range from 45 MHz to 995 MHz.

          Table 1 Lane and Block Frequencies for Annex B and Annex C
          Lane Center Frequency Block 1 Center Frequency Block 2 Center Frequency Block 3 Center Frequency Block 4 Center Frequency
          1 fstart + 108 fstart + 27 fstart + 75 fstart + 123 fstart + 171
          2 fstart + 300 fstart + 219 fstart + 267 fstart + 315 fstart + 363
          3 fstart + 492 fstart + 411 fstart + 459 fstart + 507 fstart + 555
          4 fstart + 684 fstart + 603 fstart + 651 fstart + 699 fstart + 747
          Table 2 Lane and Block Frequencies for Annex A
          Lane Center Frequency Block 1 Center Frequency Block 2 Center Frequency Block 3 Center Frequency Block 4 Center Frequency
          1 fstart + 108 fstart + 27 fstart + 73 fstart + 119 fstart + 165
          2 fstart + 292 fstart + 211 fstart + 257 fstart + 303 fstart + 349
          3 fstart + 476 fstart + 395 fstart + 441 fstart + 487 fstart + 533
          4 fstart + 660 fstart + 579 fstart + 625 fstart + 671 fstart + 717

          Note


          By default all QAM ports are set with the static frequency scheme, and the default fstart value of 143 MHz. The value of fstart can be changed after system boot up. fstart range should be within 45 MHz to 949 MHz for blocks and 45 MHz to 787 MHz for lanes.


          Restrictions

          • If the new frequency of the carrier overlaps with another carrier frequency, the request is rejected.
          • If the carrier frequency is not within the predefined spectrum, the request is rejected.
          • If all configured frequencies within a block exceed eight carriers, the request is rejected.

          Example

          The following example shows how to configure a full-frequency spectrum:

          Router(config)# interface qam 7/1
          Router(config-subif)# cable downstream start-freq 50000000
          
          Port 7/1 frequency band edges are set to 50000000 Hz to 824000000 Hz.
          All the lane and blocks are set with valid frequency range.
          
             Lane 1 start frequency: 50000000 Hz
                          Block 1 start frequency: 50000000 Hz
                          Block 2 start frequency: 98000000 Hz
                          Block 3 start frequency: 146000000 Hz
                          Block 4 start frequency: 194000000 Hz
             Lane 2 start frequency: 242000000 Hz
                          Block 1 start frequency: 242000000 Hz
                          Block 2 start frequency: 290000000 Hz
                          Block 3 start frequency: 338000000 Hz
                          Block 4 start frequency: 386000000 Hz
             Lane 3 start frequency: 434000000 Hz
                          Block 1 start frequency: 434000000 Hz
                          Block 2 start frequency: 482000000 Hz
                          Block 3 start frequency: 530000000 Hz
                          Block 4 start frequency: 578000000 Hz
             Lane 4 start frequency: 626000000 Hz
                          Block 1 start frequency: 626000000 Hz
                          Block 2 start frequency: 674000000 Hz
                          Block 3 start frequency: 722000000 Hz
                          Block 4 start frequency: 770000000 Hz
          Record Downloaded to slot(s):
          Frequencies in use:
          
          

          The following is a sample output for an incomplete frequency spectrum:

          Router(config)# interface qam 7/1
          Router(config-subif)# cable downstream start-freq 995000000
          
          Port 7/1 frequency band edges are set to 995000000 Hz to 1003000000 Hz
          From lane 1 to block 1 of lane 1 has occupied the port frequency range from 995000000 Hz to 1003000000 Hz
          
             Lane 1 start frequency: 995000000 Hz
                          Block 1 start frequency: 995000000 Hz
                          Block 2 start frequency: 0 Hz
                          Block 3 start frequency: 0 Hz
                          Block 4 start frequency: 0 Hz
             Lane 2 start frequency: 0 Hz
                          Block 1 start frequency: 0 Hz
                          Block 2 start frequency: 0 Hz
                          Block 3 start frequency: 0 Hz
                          Block 4 start frequency: 0 Hz
             Lane 3 start frequency: 0 Hz
                          Block 1 start frequency: 0 Hz
                          Block 2 start frequency: 0 Hz
                          Block 3 start frequency: 0 Hz
                          Block 4 start frequency: 0 Hz
             Lane 4 start frequency: 0 Hz
                          Block 1 start frequency: 0 Hz
                          Block 2 start frequency: 0 Hz
                          Block 3 start frequency: 0 Hz
                          Block 4 start frequency: 0 Hz
          Record Downloaded to slot(s):
          Frequencies in use:
          
          

          The following is a sample output of the show controller qam slot/port.channel downstream command that displays information about frequency, lane, and block assignments on a QAM:

          Router# show controllers qam 3/1.1 downstream
          
          Qam 3/1.1 Downstream is up
                RF Profile Name: Remote-RF-Profile-13
                Annex B, Power: 44.0 dBmV
                Frequency: 555000000 Hz, lane: 3, block: 1
                Modulation: 256QAM, TSID: 311, QAM IDB_State: UP
                Bandwidth Reserved for Video:   0        bps
                Bandwidth Used:                 1739488  bps
                Bandwidth Total:                38810000 bps
                Transport Mode: QAM_MODE_MPT Qam Owner: REMOTE
                Interleave Level: 2, FEC I: 32 FEC J: 4
                SNMP LINK TRAP: Disabled
          
          

          The following is a sample output of the show controller qam slot/port downstream command that displays information about the freq-profile on the port:

          Router# show controllers qam 4/2 downstream
          
          RF Port4/2 is disabled
          Max carrier density on this port set to 8
          
          Valid rf-power range: 39.0 dBmV to 51.0 dBmV
          Default RF Power value: 45.0 dBmV
          
          RF Power configured on the Qam channels:
          
          Qam interface current-rf-power
          x-----------------x---------------
          Qam-red4/2.1 41.0 dBmV
          Qam-red4/2.2 41.0 dBmV
          Qam-red4/2.3 41.0 dBmV
          Qam-red4/2.4 41.0 dBmV
          Qam-red4/2.5 41.0 dBmV
          Qam-red4/2.6 41.0 dBmV
          Qam-red4/2.7 41.0 dBmV
          Qam-red4/2.8 41.0 dBmV
          Frequency Profile ID: annex-b-low
          
          Frequency in use carrier_id lane_id block_id 
          x-----------------x-----------x--------x--------
          675000000hz 141 4 1 Qam-red4/2.1
          681000000hz 142 4 1 Qam-red4/2.2
          687000000hz 143 4 1 Qam-red4/2.3
          693000000hz 144 4 1 Qam-red4/2.4
          699000000hz 145 4 1 Qam-red4/2.5
          705000000hz 146 4 1 Qam-red4/2.6
          711000000hz 147 4 1 Qam-red4/2.7
          717000000hz 148 4 2 Qam-red4/2.8 
          
          

          User Scenario

          Consider the following scenario:

          • A DS-96 user licence on the Cisco RFGW-10 DS-384, that is, 96 downstream channels on QAM port 3/1
          • 32 carriers
          • Annex-B
          • fstart = 234 MHz

          Requirement:

          To configure two non-contiguous and six contiguous channels with frequencies—714, 720, 726, 732, 738, 744, 320, and 475. The following table describes the lane and block frequencies on the corresponding interface.

          Table 3 Lane and Block Frequencies Configured as a Mix of Contiguous and Non-Contiguous Frequencies
          Interface Frequency Lane Block
          3/1.1 714 3 3
          3/1.2 720 3 3
          3/1.3 726 3 3
          3/1.4 732 3 3
          3/1.5 738 3 3
          3/1.6 744 3 3
          3/1.7 320 1 2
          3/1.8 475 2 2

          As a result, the lane frequencies are assigned as follows:

          • Lane 1: 234 MHz - 426 MHz
          • Lane 2: 426 MHz - 618 MHz
          • Lane 3: 618 MHz - 810 MHz
          • Lane 4: 810 MHz - 1002MHz

          Twelve (12) additional contiguous channels are configured as shown in the following table:

          Table 4 Lane and Block Frequencies Configured as Contiguous Frequencies
          Interface Frequency Lane Block
          3/1.9

          517

          2 2
          3/1.10

          523

          2 3
          3/1.11

          529

          2 3
          3/1.12

          535

          2 3
          3/1.13

          541

          2 3
          3/1.14

          547

          2 3
          3/1.15

          553

          2 3
          3/1.16

          559

          2 3
          3/1.17

          565

          2 3
          3/1.18

          571

          2 4
          3/1.19

          577

          2 4
          3/1.20

          583

          2 4

          Note


          Whenever there is a change in the fstart of the port, all frequencies of QAM channel on the port are revalidated against the new lane and block. If any frequency is invalid, that frequency is set as an invalid frequency or 0 Hz and an error notification is displayed on the console.


          Configuring User-Defined Frequency Scheme


          Note


          Cisco IOS-XE Release 3.2.0SQ does not support the user-defined frequency scheme.


          Configuring the user-defined frequency scheme provides complete control to the user to configure lane, block, and channel frequencies anywhere in the spectrum through global frequency profiles. In this scheme all lane and block start frequencies (fstart) can be non-contiguous. These frequency profiles can then be applied to the port.

          In the global frequency profile, any set of 216 MHz, or less than 216 MHz (in the range of 45 MHz to 1003 MHZ) can be assigned to any lane.

          The Cisco RF Gateway 10 Supervisor Engine 7-E displays the lane frequency range after configuring the lane fstart.

          Restrictions

          • Frequency, lane, and block assigned to the QAM subinterface must be within the frequency range for the configured lane and block.
          • Configured frequencies within a block must not exceed 54 MHz and 8 carriers.
          • Sum total of the configured frequencies must not exceed 216 MHz on the lane and 32 channels of Annex B or 24 channels of Annex A per lane.
          • Default frequency profile is 54 MHz wide block width and 216 MHz wide lane width; however, block and lane overlaps starts at 48 MHz and 192 MHz respectively.
          • Frequencies on each channel must not overlap.
          • Annex type must be configured before configuring the frequency profile on any RF Port. If the Annex type is not specified, Annex B is assumed.

            Note


            In Cisco IOS-XE Release 3.2.0SQ, the Annex type is defined in the RF profile by default.


          • Each block fstart on a corresponding lane should be equal to, or greater than the lane fstart.
          • The Supervisor default frequency profile cannot be modified.
          • Up to 10 frequency profiles on an RF Gateway 10 chassis can be created.
          • Each block frequency range should be within the 216 MHz from the lane start frequency, provided the lane frequency range has not exceeded 1003 MHz.
          • If the fstart of the lane is not capable of occupying 216 MHz within the frequency range limit of 1003 MHz, the last block with fstart below 1003 MHz is configured. Blocks exceeding 1003 MHz are configured as invalid frequency or 0 Hz internally.
          • Blocks can overlap within the same lane.
          • Duplicate frequency profiles are not allowed.
          • If global frequency profiles are applied on any of the port at chassis level, they can no longer be deleted.
          • While removing the frequency profile from the port, the Supervisor card enables the static frequency scheme on the port with the fstart value of 143 MHz.
          • Modifications to the global frequency profile revalidates the center frequencies of all QAM channels of the port where this freq-profile is applied. If a frequency is found to be invalid, then it is set to 0 Hz (invalid frequency) and an error notification is displayed.
          • Frequency profile names are case sensitive.
          Specifying Frequency Profile

          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    interface qam slot/port.

            4.    cable downstream freq-profile freq-profile-name

            5.    exit


          DETAILED STEPS
              Command or Action Purpose
            Step 1 enable


            Example:
            Router> enable
             

            Enables privileged EXEC mode.

            Enter your password if prompted.

             
            Step 2 configure terminal


            Example:
            Router# configure terminal
             

            Enters global configuration mode.

             
            Step 3 interface qam slot/port.


            Example:
            Router(config)# interface qam 3/1
             

            Configures the interface QAM on the line card.

            • slot—Slot of the line card in the QAM interface. The valid range is from 3 to 12.
            • port—Port on the specified slot. The valid range is from 1 to 8.
            • channel—(Optional) Channel on the specified port. The valid range is from 1 to 128. Enters the QAM subinterface configuration mode when executed.
             
            Step 4 cable downstream freq-profile freq-profile-name


            Example:
            Router(config-if)# cable downstream freq-profile freq-profile-1
             

            Creates the frequency profile at the Cisco RFGW-10 chassis level and applies it to any RF port on the Cisco RFGW-10 DS-384 line card.

            • freq-profile-id—Profile ID applied to the RF port. The default value is 1.
             
            Step 5 exit


            Example:
            Router(config-freq-prof-lane)# exit
             

            Exits the frequency profile mode.

             

            The following example shows how to configure a user-defined frequency scheme:

            Router> enable
            Router# configure terminal
            Router(config)# interface qam 3/1
            Router(config-if)# cable downstream freq-profile freq-profile-1
            

            The following is a sample output from the show running-config command that displays contiguous frequencies on QAM carriers with Annex B and port density of eight carriers per port:

            Router# cable downstream freq-profile 1
            
            cable downstream freq-profile 1
               lane 1 start-freq 300000000
                 block 1 start-freq 381000000
                 block 2 start-freq 327000000
                 block 3 start-freq 435000000
                 block 4 start-freq 489000000
              lane 2 start-freq 625000000
                 block 1 start-freq 652000000
                 block 2 start-freq 544000000
                 block 4 start-freq 701000000
              lane 3 start-freq 840000000
                block 1 start-freq 759000000
                block 2 start-freq 813000000
            !
            Interface Qam-red3/1
               cable downstream freq-profile 1
            !
            interface Qam-red3/1.1
              cable downstream frequency 714000000 lane 2 block 4
            !
            interface Qam-red3/1.2
              cable downstream frequency 720000000 lane 2 block 4
            !
            interface Qam-red3/1.3
              cable downstream frequency 726000000 lane 2 block 4
            !
            interface Qam-red3/1.4
              cable downstream frequency 732000000 lane 3 block 1
            !
            Interface Qam-red3/1.5
              cable downstream frequency 738000000 lane 3 block 1
            !
            interface Qam-red3/1.6
              cable downstream frequency 744000000 lane 3 block 1
            !
            interface Qam-red3/1.7
              cable downstream frequency 320000000 lane 1 block 2
            !
            Interface Qam-red3/1.8
              cable downstream frequency 580000000 lane 2 block 2
            
            

            To run the command at the QAM interface level, the lane and block number must be assigned to the frequency allocated for the QAM subinterface. The following example shows how to configure the user-defined frequency set at the QAM subinterface level:

            Router> enable
            Router# configure terminal
            Router(config)# interface qam-red 3/1
            Router(config-if)# cable downstream freq-profile 1
            Router(config-if)# interface qam-red 3/1.1
            Router(config-subif)# cable downstream frequency 300000000

            Configuring the QAM Replication Group

            Before You Begin
            • Check the license on the line card.

              Note


              The downstream spanning license allows additional replicated output to be added until the total downstream output including replicates is 384.


                Command or Action Purpose
              Step 1 enable


              Example:
              Router> enable
               

              Enables privileged EXEC mode.

              Enter your password if prompted.

               
              Step 2 configure terminal


              Example:
              Router# configure terminal
               

              Enters global configuration mode.

               
              Step 3 cable qam-replication-group {group-id | new}


              Example:
              Router(config)# cable qam-replication-group new
               

              Creates a QAM replication group.

              • group-id—QAM replication group ID. The valid range is from 1 to 3840.
              • new—Creates a new group and assigns a group number automatically.
               
              Step 4 pilot-qam {qam | qam-red}{qam-interface-number}


              Example:
              Router(config-qrg)# pilot-qam qam-red3/1.1
               

              configures the pilot (source) QAM.

               
              Step 5 replicate-qam {qam | qam-red}{qam-interface-number}


              Example:
              Router(config-qrg)# replicate-qam qam-red3/5.1
               

              configures the replicate (destination) QAM.

               
              Step 6 end


              Example:
              Router# end
               

              Returns to privileged EXEC mode.

               

              Replicating a single QAM from slot 3 port 2 channel 30 to slot 3 port 4 channel 58:

              Router(config)# cable qam-replication-group 1
              Router(config-qrg)# pilot-qam Qam3/2.30
              Router(config-qrg)# replicate-qam Qam3/4.58
              

              Replicating a single QAM from slot 7 port 5 channel 123 to slot 7 port 4 channel 95 and to slot 7 port 1 channel 11:

              Router(config)# cable qam-replication-group 6
              Router(config-qrg)# pilot-qam Qam7/5.123
              Router(config-qrg)# replicate-qam Qam7/4.95
              Router(config-qrg)# replicate-qam Qam7/1.11

              Following is an example of the show running-config command when the QAM channel 5/1.1 is replicated to 5/2.1:

              Router# show running-config interface Qam5/1.1
              Building configuration... 
              Current configuration : 398 bytes 
              ! 
              interface Qam5/1.1
               cable carrier-id 1 
               cable mode video remote encrypt
               cable downstream lqam-group 1
               cable downstream tsid 53001
               cable downstream rf-profile rfprofile_video
               cable downstream rf-power 37.0
               cable downstream frequency 285000000
               no cable downstream rf-shutdown
               cable downstream interleaver-depth I128-J1
               cable qam-replication-group 2 pilot
               cable partition 1 external-channel 1
              end
              Router# show running-config interface Qam5/2.1
              Building configuration...
              Current configuration : 88 bytes
              !
              interface Qam5/2.1
               cable carrier-id 21
               cable qam-replication-group 2 replicate
              end

              Note


              In the above example, the replicate interface does not show the “cable downstream rf-shutdown” entry, which otherwise is displayed. This is because, both the pilot and replicate channels are part of qam-replication-group 2.


              For the pilot QAM:

              Router# show controllers Qam 5/1.1 downstream
              Qam 5/1.1 Downstream is up
              	RF Profile Name                            : rfprofile_video
              	LQAM Group: 1 Id                           : 0 
              	Annex B, Power                             : 37.0 dBmV
              	Frequency                                  : 285000000 Hz, lane: 2, block: 1
              	Modulation                                 : 256QAM, TSID: 53001, QAM IDB_State: UP
              	Bandwidth Reserved for Video               : 0 bps
              	Bandwidth Used                             : 15040 bps
              	Bandwidth Total                            : 38810700 bps
              	Transport Mode                             : QAM_MODE_VIDEO Qam Owner: REMOTE
              	Qam License                                : Exists
              	Interleave Level                           : 2, FEC I: 128 FEC J: 1
               	SNMP LINK TRAP                            : Disabled
              	Bandwidth Reserved for Video Shell Sessions: 0 bps
              	Bandwidth Used by Video Shell Sessions     : 0 bps

              For the replicate QAM:

              Router# show controllers Qam 5/3.1 downstream
              Qam 5/3.1 Downstream is up
              	Replicate of Pilot Qam 5/1.1
              	RF Profile Name                            : rfprofile_video
              	LQAM Group                                 : 1 Id: 0 
              	Annex B, Power                             : 37.0 dBmV
              	Frequency: 285000000 Hz, lane              : 2, block: 1
              	Modulation: 256QAM, TSID                   : 53001, QAM IDB_State: UP
              	Bandwidth Reserved for Video               :   0        bps
              	Bandwidth Used                             :                 15040    bps
              	Bandwidth Total                            :                38810700 bps
              	Transport Mode                             : QAM_MODE_VIDEO Qam Owner: REMOTE
              	Qam License                                : Exists
              	Interleave Level                           : 2, FEC I: 128 FEC J: 1
              	SNMP LINK TRAP                             : Disabled
              	Bandwidth Reserved for Video Shell Sessions: 0        bps
              	Bandwidth Used by Video Shell Sessions     :      0        bps

              Following is an example of the show cable video sessions for a replicate QAM:

              Router# show cable video session Qam5/3.1
              Interface is a replicate.  To view session information, use the same command on the pilot interface Qam5/1.1

              Following is a sample output of the show cable qam-replication-group all command:

              Router# show cable qam-replication-group all
              
              QRG   Pilot Qam   Replicate Qams
              ----  ----------  ---------------
              1     3/1.1       3/6.1, 3/7.1, 3/8.1
              10    3/1.2       3/6.2, 3/8.2, 3/7.2
              11    3/1.3       3/6.3, 3/7.3, 3/8.3

              Following is a sample output of the show cable qam-replication-group command for a single group:

              Router# show cable qam-replication-group 10
              
              QRG   Pilot Qam   Replicate Qams
              ----  ----------  ---------------
              10    3/1.2       3/6.2, 3/8.2, 3/7.2
              
              What to Do Next

              Repeat this configuration for every group. Port-level replication is not supported.

              How to Configure DEPI on a QAM Interface

              All QAM carriers on an RF port can be used on the DEPI as long as the QAM subinterface is configured for DEPI mode.

              Restrictions

              To use DEPI, run the cable mode depi command to reserve bandwidth for the mid-plane.

              The cable mode depi local lbg command is used to specify the load balancing group (LBG) that can be used to forward traffic to the line card. However, for remote DEPI, the system reserves the bandwidth of the LBG that is least loaded.

              For more information on Configuring Manual DEPI Sessions, see M-CMTS DEPI.

              How to Configure a Line Card Switchover

              During a line card switchover to a redundant or standby line card, the QAM configuration, logical profile ID, QAM ID mapping, and frequency ID assignments of the primary line card remain unchanged and are reapplied on the standby line card.

              Configuration Examples of the QAM Features for the Cisco RFGW-10 DS-384 Line Card

              This section describes a sample user scenario with the following configuration:

              • User licence on the Cisco RFGW-10 DS-384 line card: DS-96 (96 downstream channels)
              • Four service groups connected to four RF ports on the line card
              • Eight contiguous carriers on every port: 32 carriers
              • Center frequencies on the RF port: 717 MHz, 723 MHz, 729 MHz, 735 MHz, 741 MHz, 747 MHz, 753 MHz, and 759 MHz

              User Requirements

              To use QAM 64 in the highest two carriers in the channel lineup.

              Recommendation

              Configure two RF profiles that can be used for four logical groups in the upconverter as follows:

              RF Profile 1

              • Logical Group 1 – QAM 64, Annex B

              RF Profile 2

              • Logical Group 2 – QAM 256, Annex B
              • Logical Group 3 – QAM 256, Annex B
              • Logical Group 4 – QAM 256, Annex B

              The carriers in the logical group can be assigned as:

              • Logical Group 1: 3/1.7, 3/1.8, 3/2.7, 3/2.8, 3/3.7, 3/3.8, 3/4.7, 3/4.8
              • Logical Group 2: 3/1.1, 3/1.2, 3/1.3, 3/1.4, 3/1.5, 3/1.6, 3/2.1, 3/2.2
              • Logical Group 3: 3/2.3, 3/2.4, 3/2.5, 3/2.6, 3/3.1, 3/3.2, 3/3.3, 3/3.4
              • Logical Group 4: 3/3.5, 3/3.6, 3/4.1, 3/4.2, 3/4.3, 3/4.4, 3/4.5, 3/4.6

              With a default starting frequency of 234 MHz, the lane and block frequencies can be configured as described in the table below:

              Table 5 Suggested Lane and Block Frequencies
              Lane Starting Frequency

              Block 1 Start

              Block 2 Start

              Block 3 Start

              Block 4 Start

              1 234 234 282 330 378
              2 426 426 474 522 570
              3 618 618 666 714 762
              4 810 810 858 906 954

              Configuring a QAM Subinterface

              The following example shows how a QAM subinterface is configured:


              Note


              QAM subinterfaces are not visible in the configuration until the density at the port is configured:


              Router# configure terminal 
              Router(config)# interface qam 3/1
              Router(config-subif)# cable downstream max-carriers 8
              
              

              The following output displays the QAM subinterfaces:

              Interface Qam3/1
                 No ip address
                 cable downstream rf-shutdown
                 cable downstream max-carriers 8
              !
              interface Qam3/1.1
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.2
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.3
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.4
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.5
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.6
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.7
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/1.8
                 cable downstream rf-power 57
                 cable downstream rf-shutdown
              !
              interface Qam3/2
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/3
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/4
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/5
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/6
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/7
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/8
                 no ip address
                 cable downstream rf-shutdown
              !
              

              Configuring Downstream RF Parameters

              Before configuring carrier center frequencies, the following should be configured:

              • A unique Annex mode for the QAM via the rf-profile assignment
              • A freq-profile or the start-freq at the port level

              To configure and manage the QAM RF profile:

              1. Create an RF profile, if an RF profile does not exist. See "Creating an RF Profile" section below.
              2. Assign the profile ID to a given QAM interface. See "Assigning an RF Profile to a QAM Subinterface" section below.

              Creating an RF Profile

              The following example shows how to create an RF profile:


              Note


              Interleaver depth provides protection from bursts of noise on the hybrid fiber coaxial (HFC) network. For more information on the commands to configure the interleaver depth, see the Cisco RF Gateway 10 Command Reference.


              Router# configure terminal 
              Router(config)# cable downstream rf-profile 1
              Router(config-rfprof)# cable downstream modulation 64
              Router(config-rfprof)# cable downstream annex A
              Router(config-rfprof)# cable downstream interleaver-depth option1 I128-J1 option2 I32-J4

              Note


              If the Annex mode is set to Annex A, configure the symbol rate using the cable downstream symbol rate command.


              Assigning an RF Profile to a QAM Subinterface

              After configuring the profile, the RF profile must be assigned to a QAM subinterface in the chassis.


              Note


              An Annex type must be configured on a port before the RF profile is assigned on any one of its QAM subinterfaces; otherwise Annex B is taken as the default Annex type on all ports.



              Note


              An rf-profile with Annex B can be configured and then applied either at the QAM subinterface level or at the port level. If the rf-profile is applied at the port level, all QAMs on that port are configured with this rf-profile.


              The following example shows how to assign an RF profile to a QAM subinterface:

              Router(config)# interface qam 3/1
              Router(config-subif)# cable downstream annex A
              Router(config-subif)# exit
              Router(config)# interface qam 3/1.7
              Router(config-subif)# cable downstream rf-profile 1
              Router(config-subif)# cable downstream interleaver-depth I32-J4
              Router(config-subif)# exit
              Router(config)# interface qam 3/1.8
              Router(config-subif)# cable downstream rf-profile 1
              Router(config-subif)# cable downstream interleaver-depth I128-J1
              Router(config-subif)# end

              Configuring the LQAM Group ID

              The following examples show how to configure the LQAM Group ID.

              Manual DEPI configuration

              interface Qam-red4/2.1
              cable carrier-id 141
              cable mode depi local lbg 1 
              cable downstream lqam-group 13
              cable downstream tsid 501
              cable downstream rf-profile local_64_16
              cable downstream rf-power 41.0
              cable downstream frequency 675000000
              cable downstream rf-shutdown
              cable downstream interleaver-depth I16-J8
              cable depi dest-ip 192.168.5.10
              
              

              Remote DEPI configuration

              interface Qam-red4/1.1
              cable carrier-id 1
              cable mode depi remote learn
              cable downstream lqam-group 1
              cable downstream tsid 101
              depi depi-tunnel s_6/1/0 
              
              

              Configuring RF Power

              When a QAM subinterface is created, the Cisco RF Gateway 10, by default, assigns RF power to the QAM based on the number of combined carriers on the port. However, RF power output can be changed by using the cable downstream rf-power command.

              The following example shows how to change the RF output power on a carrier to 50.5 dBmV:

              Router# configure terminal 
              Router(config)# interface qam 3/1.7
              Router(config-subif)# cable downstream rf-power 50.5
              Router(config-subif)# end
              
              

              Configuring Downstream Frequency

              To configure downstream frequency two methods can be used:

              • Use the cable downstream frequency command at the port level to identify the lower edge starting frequency. This command creates a single lane using two blocks on each RF port.
                Router(config)# interface qam 3/1
                Router(config-subif)# cable downstream frequency 627000000
                Router(config)# interface qam 3/1.1
                Router(config-subif)# cable downstream frequency 714000000
                Router(config)# interface qam 3/1.2
                Router(config-subif)# cable downstream frequency 720000000
                Router(config)# interface qam 3/1.3
                Router(config-subif)# cable downstream frequency 726000000
                Router(config)# interface qam 3/1.4
                Router(config-subif)# cable downstream frequency 732000000
                Router(config)# interface qam 3/1.5
                Router(config-subif)# cable downstream frequency 738000000
                Router(config)# interface qam 3/1.6
                Router(config-subif)# cable downstream frequency 744000000
                Router(config)# interface qam 3/1.7
                Router(config-subif)# cable downstream frequency 750000000
                Router(config)# interface qam 3/1.8
                Router(config-subif)# cable downstream frequency 756000000
                
                
              • Specify a frequency plan by configuring the lane and block frequencies, and assigning them to each carrier.

                Note


                Assigning a freq-profile ID on an RF port overwrites the start-frequency that is preassigned at the RF port. Use the show cable freq-profile command to display the frequency profile on the RF port.


                Router(config)# cable downstream freq-profile 1
                Router(config-frq)# lane 1 start-freq 627000000
                Router(config-frq-ln)# block 1 start-freq 714000000
                Router(config-frq-ln)# end
                Router(config)# interface qam 3/1
                Router(config-subif)# cable downstream freq-profile 1
                Router(config)# interface qam 3/1.1
                Router(config-subif)# cable downstream frequency 714000000
                Router(config)# interface qam 3/1.2
                Router(config-subif)# cable downstream frequency 720000000
                Router(config)# interface qam 3/1.3
                Router(config-subif)# cable downstream frequency 726000000
                Router(config)# interface qam 3/1.4
                Router(config-subif)# cable downstream frequency 732000000
                Router(config)# interface qam 3/1.5
                Router(config-subif)# cable downstream frequency 738000000
                Router(config)# interface qam 3/1.6
                Router(config-subif)# cable downstream frequency 744000000
                Router(config)# interface qam 3/1.7
                Router(config-subif)# cable downstream frequency 750000000
                Router(config)# interface qam 3/1.8
                Router(config-subif)# cable downstream frequency 756000000
                
                

              The following is a sample output that displays a portion of the show running-configuration command:

              Interface Qam3/1
                 cable downstream freq-profile 1
                 cable downstream rf-shutdown
                 cable downstream max-carriers 8
              !
              .......
              interface Qam3/1.7
                 cable downstream rf-profile 1
                 cable downstream rf-power 57
                 cable downstream frequency 750000000 lane 1 block 1
                 cable downstream rf-shutdown
              !
              interface Qam3/1.8
                  cable downstream rf-profile 1
                 cable downstream rf-power 57
                 cable downstream frequency 756000000 lane 1 block 1 
                 cable downstream rf-shutdown
              !
              interface Qam3/2
                 no ip address
                 cable downstream rf-shutdown
              !
              Interface Qam3/3
                 cable downstream rf-shutdown
              
              

              Troubleshooting QAM Features

              Use the following commands to troubleshoot and debug the QAM features on the Cisco RFGW-10 DS-384 line card:

              • show cable rf-profile
              • show cable freq-profile
              • show cable linecard version
              • show cable linecard carrier-id-mapping
              • show cable linecard logical-qamid-grp
              • debug cable qam events
              • debug cable qam messages
              • debug cable qam trace
              • debug cable qam lcred
              • debug cable qam errors
              • debug cable qam config

              Additional References

              Related Documents

              Related Topic Document Title
              Bundle Image Upgrade—allows efficient upgrade of multiple devices simultaneously by programming them with a new image. Bundled Image Upgrade
              Alarm and Event Management—provides information about previous and current events in the system. Alarm and Event Management
              DOCSIS Timing Interface (DTI) Offset—enables DOCSIS timing offset adjustment. DTI Offset
              M-CMTS D-MPT Manual Mode—processes D-MPT traffic from the M-CMTS core. D-MPT
              M-CMTS DEPI M-CMTS DEPI
              Line Card Redundancy—supports two types of line card redundancy, 1:1 and 1:N 1:1 and 1:N Line Card Redundancy
              Cisco RFGW-10 commands Cisco RF Gateway 10 Command Reference
              Release Notes for Cisco RF Gateway 10 Release Notes

              Standards and RFCs

              Standard/RFC Title
              No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

              MIBs

              MIB MIBs Link
              No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

              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/​cisco/​web/​support/​index.html

              Feature Information for Configuring QAM Features for the DS-384 Line Card

              The table below lists the release history for this feature.

              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:/​/​www.cisco.com/​go/​cfn. An account on Cisco.com is not required.


              Note


              The following 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 6 Feature Information for Configuring QAM Features for the DS-384 Line Card on the Cisco RF Gateway 10
              Feature Name Release Feature Information
              Configuring QAM Features for the DS-384 Line Card on the Cisco RF Gateway 10 IOS-XE Release 3.2.0SQ This feature was introduced.

              The following commands were introduced or modified:

              • cable start-freq
              • cable freq-profile
              • cable frequency (channel)
              • show cable linecard carrier-id-mapping
              QAM Replication Cisco IOS-XE Release 3.3.0SQ

              This feature allows users to replicate a single QAM output from one port to another port on the same Cisco DS-384 line card from the Supervisor card.

              The following commands were introduced or modified:
              • cable qam-replication group
              • pilot-qam
              • replicate-qam
              • show cable qam-replication-group

              Obtaining Documentation and Submitting a Service Request

              For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

              http:/​/​www.cisco.com/​en/​US/​docs/​general/​whatsnew/​whatsnew.html

              Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.