Cisco Cisco SG300-28 28-Port Gigabit Managed Switch Maintenance Manual

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VLAN Management
Customer Port Multicast TV VLAN
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 
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STEP  3
Click Apply. Multicast TV VLAN settings are modified, and written to the Running 
Configuration file.
Port Multicast VLAN Membership
To define the Multicast TV VLAN configuration:
STEP 1
Click VLAN Management > Access Port Multicast TV VLAN > Port Multicast VLAN 
Membership.
STEP  2
Select a VLAN from the Multicast TV VLAN field.
STEP  3
The Candidate Access Ports list contains all access ports configured on the 
device. Move the required ports from the Candidate Access Ports field to the 
Member Access Ports field.
STEP  4
Click Apply. Multicast TV VLAN settings are modified, and written to the Running 
Configuration file.
Customer Port Multicast TV VLAN
A triple play service provisions three broadband services, over a single 
broadband connection:
High-speed Internet access 
Video
Voice
The triple play service is provisioned for service provider subscribers, while 
keeping Layer 2-isolation between them.
Each subscriber has a CPE MUX box. The MUX has multiple access ports that are 
connected to the subscriber's devices (PC, telephone and so on), and one network 
port that is connected to the access device.
The box forwards the packets from the network port to the subscriber's devices 
based on the VLAN tag of the packet. Each VLAN is mapped to one of the MUX 
access ports.