Cisco 350 Series Administration Manual page 321

VLAN Management
Customer Port Multicast TV VLAN
Customer Port Multicast TV VLAN
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
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.
Packets from subscribers to the service provider network are forwarded as VLAN tagged
frames, in order to distinguish between the service types, which mean that for each service
type there is a unique VLAN ID in the CPE box.
All packets from the subscriber to the service provider network are encapsulated by the access
device with the subscriber's VLAN configured as customer VLAN (Outer tag or S-VID),
except for IGMP snooping messages from the TV receivers, which are associated with the
Multicast TV VLAN. VOD information that is also sent from the TV receivers are sent like
any other type of traffic.
Packets from the service provider network that received on the network port to the subscriber
are sent on the service provider network as double tag packets, while the outer tag (Service
Tag or S-Tag) represent one of the two type of VLAN as following:
• Subscriber's VLAN (Includes Internet and IP Phones)
• Multicast TV VLAN
The inner VLAN (C-Tag) is the tag that determines the destination in the subscriber's network
(by the CPE MUX).
Workflow
1. Configure an access port as a customer port (using the
for more information.
2. Configure the network port as a trunk or general port with subscriber and Multicast TV
VLAN as tagged VLANS. (using the
Interface Settings
Interface Settings page.
12
page). See QinQ
265