Cisco Headend System Release 2.7 Installation Guide

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Chapter 2    Before You Begin 
 
 
 
78-4036705-01 Rev D 
Modify Ports on the Router 
Contact your system administrator to find out which GQAM will be used for 
DTACS sessions. This GQAM will display content on the DTA and its frequencies 
should be plant-wide. These frequencies will not be used on a specific hub.  
After you obtain this information, you must perform the following steps.  
1  Enable GigE GQAM ports for IP PIM sparse-mode. 
2  Enable GigE GQAM ports for IP IGMP Version 3. 
3  Enable multicast routing on DNCS VLAN on the router. 
For More Information 
For specific information on provisioning GQAMs for the DTACS, refer to the DNCS 
online help or to the installation and configuration guide for your specific GQAM 
software release.