> Broadcast Multicast Service
> This chapter provides information on Broadcast Multicast Service (BCMCS) functionality. The product Administration Guides provide examples and procedures for configuration of basic services on the system. It is recommended that you select the configuration example that best meets your service model, and configure the required elements for that model, as described in the respective product Administration Guide, before using the procedures in this chapter.
> Important: The features described in this chapter are only available if you have purchased and installed a feature license for Broadcast & Multicast Services.
> This chapter contains the following sections:

> • | Overview

> • | Configuring BCMCS

> Overview
> BCMCS eliminates unnecessary replication of data on CDMA2000 wireless networks by transmitting a single stream of data to multiple users. By delivering a single, unidirectional data stream to many subscribers, BCMCS makes more efficient use of wireless network resources than traditional point to point connections.
> BCMCS functionality on the system is provided by an existing PDSN service and is enabled by a valid Broadcast & Multicast Services license. In the absence of a valid license, the system functions as a standard unicast PDSN. When a PDSN is functioning in a BCMCS environment, it is designated as a Broadcast Serving Node (BSN). The main features supported by the Broadcast & Multicast Services license are:

> • | Multicast proxy-host functionality.

> • | Support for BCMCS-specific A11 messages.

> • | Authentication of BCMCS flow-IDs using a BCMCS controller.

> • | Establishment and teardown of BCMCS bearer paths using the multicast framework.

> • | Support for framing HDLC-like and segment based framing.

> • | Accounting for the BCMCS flows to charge the originator of the content.

> Licensing
> To enable BCMCS on the system, you must install the Broadcast & Multicast Services license. For more information on installing licenses, refer to Software Maintenance Operations in the System Administration Guide.
> Configuring BCMCS
> To configure the system for BCMCS:

> Step 1 | Configure the system for PDSN functionality as described in the PDSN Administration Guide.

> Step 2 | Set the BCMCS group user name and password for RADIUS access as described in the BCMCS Group Configuration section.

> Step 3 | Create a multicast group profile on your RADIUS server to achieve BCMCS functionality as described in the RADIUS Server Configuration section.

> Step 4 | Save your configuration as described in the Verifying and Saving Your Configuration chapter.

> Important: Commands used in the configuration examples in this section provide base functionality to the extent that the most common or likely commands and/or keyword options are presented. In many cases, other optional commands and/or keyword options are available. Refer to the Command Line Interface Reference for complete information regarding all commands.
> BCMCS Group Configuration
> Use the following example to set the BCMCS group user name and password for RADIUS access:
> configure
> context <context_name>
> pdsn-service <pdsn_service_name>
> bcmcs grpusrname <group_name>
> bcmcs grppasswd <group_password>
> end
> RADIUS Server Configuration
> You must create a multicast group profile on your RADIUS server to achieve BCMCS functionality. The group name and password must be the same as configured in BCMCS Group Configuration section.
> For information about the supported BCMCS attributes, refer to the AAA Interface Administration and Reference.

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