Multicast VPN and DOCSIS 3.0 Multicast QoS Support

First Published: February 14, 2008

Last Updated: November 29, 2010


Note
Cisco IOS Release 12.2(33)SCA integrates support for this feature on the Cisco CMTS routers. This feature is also supported in Cisco IOS Release 12.3BC, and this document contains information that references many legacy documents related to Cisco IOS 12.3BC. In general, any references to Cisco IOS Release 12.3BC also apply to Cisco IOS Release 12.2SC.

The CMTS enhanced multicast new features are consistent with DOCSIS 3.0 specifications and include:

  • Enhanced multicast echo in which the Layer 3 multicast switching path uses a parallel express forwarding (PXF) multicast routing table.
  • Enhanced multicast quality of service (MQoS) framework that specifies a group configuration (GC) to define a session range of multicast addresses and rule priorities and its associated multicast VPN (MVPN).
  • Intelligent multicast admission control to include multicast service flows.
  • Enhanced multicast VPN feature to configure and support multicast traffic in a multiprotocol label switching (MPLS)-VPN environment.

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.

Contents

Prerequisites for the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

DOCSIS 1.1 or 2.0 modems are required for multicast encryption. Table below shows the Cisco Cable Modem Termination System (CMTS) hardware compatibility prerequisites for this feature.


Note
The hardware components introduced in a given Cisco IOS Release will be supported in all subsequent releases unless otherwise specified.
Table 1 Multicast VPN and DOCSIS 3.0 Multicast QoS Support Hardware Compatibility Matrix

CMTS Platform

Processor Engine

Cable Interface Cards

Cisco uBR10012 Universal Broadband Router

Cisco IOS Release 12.2(33)SCA and later

  • PRE2

Cisco IOS Release 12.2(33)SCB and later

  • PRE4

Cisco IOS Release 12.2(33)SCH and later

  • PRE5

Cisco IOS Release 12.2(33)SCB and later

  • Cisco uBR10-MC5X20U/H

Cisco IOS Release 12.2(33)SCC and later

  • Cisco UBR-MC20X20V

Cisco IOS Release 12.2(33)SCE and later

  • Cisco uBR-MC3GX60V 1

Cisco uBR7246VXR Universal Broadband Router

Cisco IOS Release 12.2(33)SCA and later

  • NPE-G1

Cisco IOS Release 12.2(33)SCB and later

  • NPE-G2

Cisco IOS Release 12.2(33)SCA and later

  • Cisco uBR-MC28U/X

Cisco IOS Release 12.2(33)SCD and later

  • Cisco uBR-MC88V 2

Cisco uBR7225VXR Universal Broadband Router

Cisco IOS Release 12.2(33)SCA and later

  • NPE-G1

Cisco IOS Release 12.2(33)SCB and later

  • NPE-G2

Cisco IOS Release 12.2(33)SCA and later

  • Cisco uBR-E-28U
  • Cisco uBR-E-16U
  • Cisco uBR-MC28U/X

Cisco IOS Release 12.2(33)SCD and later

  • Cisco uBR-MC88V
1 Cisco uBR3GX60V cable interface line card is not compatible with PRE2.
2 Cisco uBR-MC88V cable interface line card is not compatible with NPE-G1. You must use NPE-G2 with the Cisco uBR-MC88V cable interface line card.

Restrictions for the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

You can only configure type of service (ToS) for Cisco uBR7200 series universal broadband routers. This parameter is not recognized by the Cisco uBR10012 universal broadband router.

Information About the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

IP multicast—transmission of the same information to multiple cable network recipients—improves bandwidth efficiency and allows service providers to offer differentiated quality of service for different types of traffic. Enhanced multicast introduces multicast improvements as mandated by the introduction of DOCSIS 3.0 specifications.


Note
DOCSIS 3.0 standards retain backwards compatibility with the DOCSIS 2.0 multicast mode of operation.

The following are the benefits of CMTS enhanced multicast are:

Improved Multicast Echo

In the enhanced multicast echo feature, the Layer 3 multicast switching path uses a parallel express forwarding (PXF) multicast routing table instead of the existing multicast echo path. Therefore, upstream packets are echoed using the Layer 3 switching path and all upstream data packets are treated similarly to the ingress packets from a WAN interface, in which they pass through existing classifiers and service flows.

The advantages of improved multicast echo are the following:

  • Each outgoing interface has its own DSJIB/DSBlaze header to satisfy baseline privacy interface plus (BPI+) and downstream session identifier (DSID) requirements.
  • The echoing decision is based on the PXF multicast routing table with packets forwarded only to interfaces that have existing clients.
  • There is independent control of echoing multicast traffic for a single cable interface within a defined cable bundle.
  • Bandwidth consumption is reduced because the upstream multicast data packets are not echoed to physical interfaces within the same cable bundle group that do not have an existing client.
  • The Internet Group Management Protocol (IGMP) control packets echo functionality is retained allowing the ability to selectively enable or disable multicast echo for IGMP reports and data.
  • Multicast QoS is supported because packets are following the same forwarding path as downstream multicast packets.

Enhanced Quality of Service

In the new multicast QoS (MQoS) framework, you can specify a group configuration (GC) that defines a session range of multicast addresses and rule priorities and its associated multicast VPN (MVPN). For every GC, there is attached a group QoS configuration (GQC) and a group encryption rule.

Based on the session range, rule priority, and MVPN, a multicast service flow is admitted into a GC and the associated GQC and group encryption rule are applied to the flow. In MQoS implementation, the source address of the multicast session is not checked because the current implementation for cable-specific multicast supports IGMP Version 2 but not IGMP Version 3. The downstream service flow, service identifier (SID), and MAC-rewrite string are created at the time of a new IGMP join (or static multicast group CLI on the interface) and MQoS is applied to the new multicast group join.

The benefits of enhanced QoS are the following:

  • Group classifiers can be applied at cable interface level and also at bundle interface level.
  • Group service flow (GSF) definition is based on service class names. The GSF is similar to individual service flows and commonly includes the minimum rate and maximum rate parameters for the service class. GSF is shared by all cable modems on a particular downstream channel set (DCS) that is matched to the same group classifier rule (GCR). A default service flow is used for multicast flows that do not match to any GCR. A GSF is always in the active state.
  • CMTS replicates multicast packets and then classifies them.
  • Single-stage replication and two-stage replication are supported.
  • Enhanced QoS is compatible and integrated with DOCSIS Set-Top Gateway (DSG).

Intelligent Multicast Admission Control

Admission control allows you to categorize service flows into buckets. Examples of categories are the service class name used to create the service flow, service flow priority, or the service flow type such as unsolicited grant service (UGS). Bandwidth limits for each bucket can also be defined. For example, you can define bucket 1 for high priority packet cable service flows and specify that bucket 1 is allowed a minimum of 30 percent and a maximum of 50 percent of the link bandwidth.

Intelligent multicast admission control includes additional features such as the inclusion of multicast service flows using the GSF concept. GSFs are created based on the rules as defined in the GQC table. The rules link the multicast streams to a GSF through the session range. The service class name in the rule defines the QoS for that GSF. Additionally, another attribute is added to the rules and the group configuration table to specify the application type to which each GSF belongs. In this way, the QoS associated with each GSF is independent of the bucket category for the GSF.

The benefits of intelligent multicast admission control are the following:

  • There is explicit acknowledgment of the establishment of each multicast session.
  • Admission control does not consume additional bandwidth for multicast flows once the first flow is established.
  • Service flows are cleaned up as the multicast session is torn down.

Multicast Session Limit Support

In a multicast video environment, you can limit the number of multicast sessions admitted onto a particular service flow. The multicast session limit feature—which adds functionality on top of the multicast QoS infrastructure—enables you to specify the number of multicast sessions to be admitted on a particular service flow. If the current number of sessions has reached the defined limit, new sessions will be forwarded but they will make use of the default multicast service flow until a session ends to free up a slot for new sessions.

Multicast Virtual Private Network

The new multicast VPN (MVPN) feature allows you to configure and support multicast traffic in a multiprotocol label switching (MPLS)-VPN environment. This feature supports routing and forwarding of multicast packets for each individual VPN virtual routing and forwarding (VRF) instance, and also provides a mechanism to transport VPN multicast packets across the service provider backbone.

MVPN allows you to connect multiple remote sites or devices over either a Layer 3 or Layer 2 VPN. A Layer 3 VPN enables the routing of traffic inside the VPN. A Layer 2 VPN provides a bridging transport mechanism for traffic between remote sites belonging to a customer. To support multicast over Layer 3 VPNs, each VPN receives a separate multicast domain with an associated MVPN routing and forwarding (mVRF) table maintained by the provider edge (PE) router. In a cable environment, the PE router is a routing CMTS. The provider network builds a default multicast distribution tree (default-MDT) for each VPN between all the associated mVRF-enabled PE routers. This tree is used to distribute multicast traffic to all PE routers.

To enable maximum security and data privacy in a VPN environment, the CMTS distinguishes between multicast sessions on the same downstream interface that belong to different VPNs. To differentiate multicast traffic between different VPNs, the CMTS implements a per-VRF subinterface multicast security association identifier (MSAID) allocation feature that is BPI+ enabled. The MSAID is allocated for each cable bundle group for each subinterface. A multicast group has a specific MSAID for each VRF instance.

How to Configure the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

This section contains the following procedures:

Configuring a QoS Profile for a Multicast Group

To configure a QoS profile that can be applied to a QoS group configuration, use the cable multicast group-qos command. You must configure a QoS profile before you can add a QoS profile to a QoS multicast group.

     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 3cable multicast group-qos number scn service-class-name control{ single | aggregate [limit max-sessions]}


    Example: 
    Router(config)#: cable multicast group-qos 2 scn name1 control single
     

    Configures a QoS profile that can be applied to a multicast QoS group.

    • number —Specifies the QoS profile number that can be applied to a multicast QoS group. The valid range is 1–255.
    Note    If a number is not specified, a default QoS profile is applied. The default group qos configuration creates a default multicast service flow for each cable interface that is used when a multicast session does not match any classifiers of a GC on the interface.
    • scn service-class-name—Specifies the service class name for the QoS profile service class.
    • control—Specifies the type of control to the service flow.
      • single–Specifies that a separate service flow is created for each session:
      • aggregate–Specifies that service flows are grouped for sessions in the same MQoS group.
    • limit max-sessions—(Optional) Specifies the Internet Group Management Protocol (IGMP) session limit for aggregate service flows. The valid range is 1–255.
     

    Configuring Encryption for a Multicast Group

    To configure and enable an encryption profile that can be applied to a QoS group configuration (GC), use the cable multicast group-encryption command. You must configure an encryption profile before you can add an encryption profile to a QoS multicast group.

       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 3cable multicast group-encryption number algorithm 56bit-des


      Example: 
      Router(config)#: cable multicast group-encryption 35 algorithm 56bit-des
       

      Specifies an encryption number and encryption type of a specific cable multicast QoS group encryption profile.

      • number—Enables encryption and specifies the encryption number that can be applied to a specific cable multicast QoS group. The valid range is 1–255.
      • algorithm 56bit-des—Specifies that the data encryption standard (DES) is 56 bits.
       

      Configuring a Multicast QoS Group

      You can specify a group configuration (GC) that defines a session range of multicast addresses and rule priorities and its associated multicast VPN (MVPN). For every GC, there is attached a group QoS configuration and a group encryption rule.

         Command or ActionPurpose
        Step 1enable


        Example: 
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2configureterminal


        Example: 
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 cable multicast group-encryption numberalgorithm56bit-des


        Example: 
        Router(config-mqos)# cable multicast group-encryption 12 algorithm 56bit-des
         

        (Optional) Specifies an encryption number and encryption type of a specific cable multicast QoS group encryption profile.

        • number—Enables encryption and specifies the encryption number that can be applied to a specific cable multicast QoS group. The valid range is 1–255.
        • algorithm 56bit-des—Specifies that the data encryption standard (DES) is 56 bits.
         
        Step 4 cable multicast group-qos number scn service-class-name control {single | aggregate [limit max-sessions]}


        Example: 
        Router(config-mqos)# cable multicast group-qos 5 scn name1 control single
         

        (Optional) Configures a QoS profile that can be applied to a multicast QoS group.

        • number—Specifies the QoS profile number that can be applied to a multicast QoS group. The valid range is 1–255.
        Note    If a number is not specified, a default QoS profile is applied. The default group qos configuration creates a default multicast service flow for each cable interface that is used when a multicast session does not match any classifiers of a GC on the interface.
        • scn service-class-name—Specifies the service class name for the QoS profile service class.
        • control—Specifies the type of control to the service flow:
          • single–Specifies that a separate service flow is created for each session.
          • aggregate–Specifies that service flows are grouped for sessions in the same MQoS group.
        • limit max-sessions—(Optional) Specifies the Internet Group Management Protocol (IGMP) session limit for aggregate service flows. The valid range is 1–255.
         
        Step 5cable multicast qos group id priority value [global ]


        Example: 
        Router(config)# cable multicast qos group 2 priority 6
         

        Configures a multicast QoS group and enters multicast QoS configuration mode.

        • id —The number of the cable multicast QoS group. The valid range is 1–255.
        • priority value—The priority of the cable multicast QoS group. The valid range is 1–255.
        • global—(Optional) Specifies that the multicast QoS group configuration is applied to all cable interfaces.
         
        Step 6 session-range ip-address ip-mask

        Example: 
        Router(config-mqos)# session-range 224.10.10.10 255.255.255.224
         

        Specifies the session range IP address and IP mask of the multicast QoS group. You can configure multiple session ranges.

         
        Step 7 tos low-byte high-byte mask

        Example: 
        Router(config-mqos)# tos 1 6 15
         

        (Optional) Specifies the minimum type of service (ToS) data bytes, maximum ToS data bytes, and mask for a multicast QoS group. The valid range for each is 0–255.

         
        Step 8 vrfname


        Example: 
        Router(config-mqos)# vrf name1
         

        (Optional) Specifies the name for the virtual routing and forwarding (VRF) instance.

        Note    If a multicast QoS (MQoS) group is not defined for this VRF, you will see an error message. You must either define a specific MQoS group for each VRF, or define a default MQoS group that can be assigned in those situations where no matching MQoS group is found. See the Configuring a Default Multicast QoS Group for VRF.
         
        Step 9 application-idnumber


        Example: 
        Router(config-mqos)# application-id 25
         

        (Optional) Specifies the application identification number of the multicast QoS group. This value is configured to enable admission control to the multicast QoS group. The valid range is 1–65535.

         

        Configuring a Default Multicast QoS Group for VRF

        Each virtual routing and forwarding (VRF) instance that is defined must match a defined MQoS group to avoid multicast stream crosstalk between VRFs. To avoid potential crosstalk, define a default MQoS group that is assigned to the VRF whenever the multicast traffic in the VRF does not match an existing MQoS group.

           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 multicast group-encryption numberalgorithm56bit-des


          Example: 
          Router(config-mqos)# cable multicast group-encryption 12 algorithm 56bit-des
           

          (Optional) Specifies an encryption number and encryption type of a specific cable multicast QoS group encryption profile. The valid range is 1–255.

          The algorithm keyword and 56bit-des argument specify that the data encryption standard (DES) is 56 bits.

          • number—Enables encryption and specifies the encryption number that can be applied to a specific cable multicast QoS group. The valid range is 1–255.
          • algorithm 56bit-des—Specifies that the data encryption standard (DES) is 56 bits.
           
          Step 4 cable multicastgroup-qosnumber scnservice-class-name control {single | aggregate [limit max-sessions]}


          Example: 
          Router(config-mqos)# cable multicast group-qos 5 scn name1 control single
           

          (Optional) Configures a QoS profile that can be applied to a multicast QoS group.

          • number—Specifies the QoS profile number that can be applied to a multicast QoS group. The valid range is 1–255.
          • scn service-class-name—Specifies the service class name for the QoS profile service class.
          • control—Specifies the type of control to the service flow:
            • single–Specifies that a separate service flow is created for each session.
            • aggregate–Specifies that service flows are grouped for sessions in the same MQoS group.
          • limit max-sessions—(Optional) Specifies the Internet Group Management Protocol (IGMP) session limit for aggregate service flows. The valid range is 1–255.
           
          Step 5cable multicast qos group id priority 255 global


          Example: 
          Router(config)# cable multicast qos group 2 priority 255 global
           

          Configures a default multicast QoS group and enters multicast QoS configuration mode.

          • id—The number of the cable multicast QoS group. The valid range is 1–255.
          • priority 255—The priority of the cable multicast QoS group is given the highest priority value of 255.
          • global—Specifies that the multicast QoS group configuration is applied to all cable interfaces.
           
          Step 6 session-range 224.0.0.0 224.0.0.0


          Example: 
          Router(config-mqos)# session-range 224.0.0.0 224.0.0.0
           

          Specifies the session-range IP address and IP mask of the default multicast QoS group. By entering 224.0.0.0 for the IP address and the IP mask you cover all possible multicast sessions.

           
          Step 7 toslow-byte high-byte mask


          Example: 
          Router(config-mqos)# tos 1 6 15
           

          (Optional) Specifies the minimum type of service (ToS) data bytes, maximum ToS data bytes, and mask for the default multicast QoS group. The valid range for each is 0–255.

           
          Step 8 vrfname


          Example: 
          Router(config-mqos)# vrf name1
           

          Specifies the name of the virtual routing and forwarding (VRF) instance.

           
          Step 9 application-idnumber


          Example: 
          Router(config-mqos)# application-id 5
           

          (Optional) Specifies the application identification number of the multicast QoS group. This value is configured to enable admission control to the multicast QoS group. The valid range is 1–65535.

           

          Verifying Configuration of the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

          To verify the configuration of the Multicast VPN and DOCSIS 3.0 Multicast QoS Support feature, use the show commands described below.

          • To show the configuration parameters for multicast sessions on a specific bundle, use the show interface bundle number multicast-sessions command as shown in the following example: 
          Router# show interface bundle 1 multicast-sessions
Multicast Sessions on Bundle1
 Group            Interface    GC  SAID SFID  GQC GEn RefCount GC-Interface State
 234.1.1.45       Bundle1.1    1   8193  ---   1   5   1        Bundle1     ACTIVE
 234.1.1.46       Bundle1.1    1   8193  ---   1   5   1        Bundle1     ACTIVE
 234.1.1.47       Bundle1.1    1   8193  ---   1   5   1        Bundle1     ACTIVE
Aggregate Multicast Sessions on Bundle1
 Aggregate Sessions for SAID 8193 GQC 1 CurrSess 3
 Group            Interface    GC  SAID SFID AggGQC GEn RefCount GC-Interface
 234.1.1.45       Bundle1.1    1   8193  ---   1      5   1        Bundle1
 234.1.1.46       Bundle1.1    1   8193  ---   1      5   1        Bundle1
 234.1.1.47       Bundle1.1    1   8193  ---   1      5   1        Bundle1
          • To show the configuration parameters for multicast sessions on a specific cable, use the show interface cable ip-addr multicast-sessions command as shown in the following example: 
          Router# show interface cable 7/0/0 multicast-sessions
Default Multicast Service Flow 3 on Cable7/0/0
Multicast Sessions on Cable7/0/0
 Group            Interface    GC  SAID SFID  GQC GEn RefCount GC-Interface State
 234.1.1.45       Bundle1.1    1   8193 24     1   5   1        Bundle1     ACTIVE
 234.1.1.46       Bundle1.1    1   8193 24     1   5   1        Bundle1     ACTIVE
 234.1.1.47       Bundle1.1    1   8193 24     1   5   1        Bundle1     ACTIVE
Aggregate Multicast Sessions on Cable7/0/0
 Aggregate Sessions for SAID 8193 SFID 24 GQC 1 CurrSess 3
 Group            Interface    GC  SAID SFID AggGQC GEn RefCount GC-Interface
 234.1.1.45       Bundle1.1    1   8193 24     1      5   1        Bundle1
 234.1.1.46       Bundle1.1    1   8193 24     1      5   1        Bundle1
 234.1.1.47       Bundle1.1    1   8193 24     1      5   1        Bundle1
          • To show the MSAID multicast group subinterface mapping, use the show interface cable address modem command as shown in the following example: 
          Router# show interface cable 6/1/0 modem
SID   Priv Type      State          IP address      method  MAC address     Dual
      bits                                                                  IP
9     11   modem     online(pt)     101.1.0.6       dhcp    0006.28f9.8c79  N
9     11   host      unknown        111.1.1.45      dhcp    0018.1952.a859  N
10    10   modem     online(pt)     101.1.0.5       dhcp    0006.5305.ac19  N
10    10   host      unknown        111.1.0.3       dhcp    0018.1952.a85a  N
13    10   modem     online(pt)     101.1.0.3       dhcp    0014.f8c1.fd1c  N
8195  10   multicast unknown        224.1.1.51      static  0000.0000.0000  N
8195  10   multicast unknown        224.1.1.49      static  0000.0000.0000  N
8195  10   multicast unknown        224.1.1.50      static  0000.0000.0000  N

          Configuration Examples for the Multicast VPN and DOCSIS 3.0 Multicast QoS Support Feature

          This section provides the following configuration examples:

          Example: Configuring Group QoS and Group Encryption Profiles


          Note
          To add group QoS and group encryption profiles to a QoS group, you must configure each profile first before configuring the QoS group.

          In the following example, QoS profile 3 and encryption profile 35 are configured. 

          configure terminal
cable multicast group-qos 3 scn name1 control single
cable multicast group-encryption 35 algorithm 56bit-des

          Example: Configuring a QoS Group

          In the following example, QoS group 2 is configured with a priority of 6 and global application. To QoS group 2, QoS profile 3 and encryption profile 35 are applied. Other parameters are configured for QoS group 2 including application type, session range, ToS, and VRF. 

          cable multicast qos group 2 priority 6 global
group-encryption 35
group-qos 3
session-range 224.10.10.01 255.255.255.254
tos 1 6 15
vrf vrf-name1
application-id 44

          Where to Go Next

          For further information on the commands required to configure, maintain, and troubleshoot Cicso uBR7200 series universal broadband routers, Cisco uBR10012 series universal broadband routers, and Cisco cable modems, see the Cisco IOS CMTS Cable Command Reference at:

          http:/​/​www.cisco.com/​en/​US/​docs/​ios/​cable/​command/​reference/​cbl_​book.html

          Additional References

          The following sections provide references related to the Multicast VPN and DOCSIS 3.0 Multicast QoS Support feature.

          Related Documents

          Related Topic

          Document Title

          CMTS cable commands

          Cisco IOS CMTS Cable Command Reference

          http:/​/​www.cisco.com/​en/​US/​docs/​ios/​cable/​command/​reference/​cbl_​book.html

          DOCSIS 1.1 as it relates to Cisco CMTS

          DOCSIS 1.1 for the Cisco CMTS Routers

          http:/​/​www.cisco.com/​en/​US/​docs/​ios/​cable/​configuration/​guide/​cmts_​docsis11.html

          Standards

          Standard

          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

          RFCs

          RFC

          Title

          RFC 2236

          Internet Group Management Protocol, Version 2

          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/​techsupport

          Feature Information for Multicast VPN and DOCSIS 3.0 Multicast QoS Support

          Table below lists the release history for this feature.

          Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

          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 Multicast VPN and DOCSIS 3.0 Multicast QoS Support

          Feature Name

          Releases

          Feature Information

          Multicast VPN and DOCSIS 3.0 Multicast QoS Support

          12.2(33)SCA

          Enhanced multicast new features include configuration of a QoS group to include QoS, encryption, VRF, ToS, application type, and session range parameters.

          The following commands were introduced or modified by this feature:

          • application-id
          • cable application-type include
          • cable multicast group-encryption
          • cable multicast group-qos
          • cable multicast qos group
          • session-range
          • show interface bundle multicast-sessions
          • show interface cable modem
          • show interface cable multicast-sessions
          • tos (multicast qos)
          • vrf (multicast qos)