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DXS/DWS 3200 Series User Guide
Page 136
Configuring Multicast VLANs
Network Manager can enhance Multicast TV services by catapulting networking into the next generation of IT
services by combining cable television, VoIP, and high speed inter-net connections via a single cable. Triple Play
service ensure that Layer 2 isolation between subscribers remains intact.
Service provider packets sent to the subscriber arrive from the following VLAN types:
• Subscriber VLANs
• Multicast TV VLANs
Each subscriber on a network maintains a Customer Premise Equipment Multi-Connect (CPE MUX) box. The
MUX boxes directs network traffic from uplink ports to MUX access ports. MUX access ports are based on VLAN
tags located in packet headers. Service provider’s packets are tagged twice. Each packet has an internal tag and
an external tag. The external tag indicates if the packet arrived from a Multicast TV VLAN or from a subscriber’s
VLAN. The internal tag indicates the port within the VLAN to which the packet is addressed.
The VLAN tag identifies:
• The media service type, including:
– Internet
– TV
– Phone
• The service provider
This section includes the following topics: