Cisco Enterprise CDN Software

Live Broadcasts Using the Cisco Enterprise CDN Software and RealServer

Document ID: 109593

Updated: Feb 11, 2009



Note: The information in this document applies to software versions 1.7, 2.0, and 2.1 on the Cisco Content Delivery Network (CDN).

When a live broadcast is set up using a RealServer G2 origin server, a URL is generated. This URL can then be put into a Web page or distributed for users to access. In order for the embedded RealServer G2 server to be used, the URL must be changed to a Cisco live URL.



There are no specific requirements for this document.

Components Used

The information in this document is based on software versions 1.7, 2.0, and 2.1 on the Cisco CDN.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.


Refer to Cisco Technical Tips Conventions for more information on document conventions.

How to Change the RealServer URL to a Live URL

Assuming the RealServer generated URL is:


Then the live URL would be:



  • host name = Cisco Content Distribution Manager (CDM) dns name

  • sigthtpath = script entry point

  • PetShop/Dogs = CDM name/channel name

  • RealLive = syntax indicating used for Real Live Pull Streaming

Once this URL has been edited, published, and selected, you are connected to a live broadcast, using a Content Engine (CE) as a RealServer G2 splitter. This process works as follows:

  1. Selecting the URL sends a request to the CDM (indicated by the host name, in this case).

  2. The CDM uses its standard replica routing to determine the best media CE to redirect the request to using the network address of the end-user.

  3. The CDM redirects the URL to the best media CE; the CE then interprets the URL to be a RealServer live event.

  4. Once the CE determines that it is a RealServer live event, then the origin server decodes the URL back to the original live URL and the splitter is set up. You may have to wait up to 30 seconds for this to be accomplished.

  5. The CE then streams the live event to the end-user.

  6. When additional users request the same live event, the same redirection process takes place, and the end-user then joins the stream on the local LAN.


Each Cisco CDM ships with a single 10-stream Client Access License (CAL) with limited functionality to be used on one CE associated with the CDM. This CAL enables the user to try out the RealNetworks functionality before purchasing full-functionality CALs that meet the end-users' complete needs. CALs can be purchased from Cisco, or directly through RealNetworks.

Installing Licenses

CAL files are installed on CEs using a floppy at system boot-up. In order to install CALs, complete these steps:

  1. Create a directory called license on a standard PC floppy.

  2. Copy all necessary CALs into the license directory. All licenses that need to reside on the CE must be on the floppy since the license directory on the floppy overwrites the directory of the same name on the CE. If there is an existing CAL on the CE that is not included on the floppy, it will be deleted upon installation of the new CAL set. All CALs can be deleted using the floppy with an empty license folder.

  3. Boot the CE.

  4. When you hear the CE access the floppy drive (while empty), insert the floppy into the drive.

  5. Once the system has booted (approximately 10 minutes), the CALs are installed.

  6. Remove the floppy and keep it in a safe place in case there is a need to reinstall the CALs.

    For more information on how to use licenses in CDN versions 2.0 and 2.1, refer to these release notes.

Related Information

Updated: Feb 11, 2009
Document ID: 109593