Large set of iptv lan Access Network Solutions (1)

In this solution, VOD, access authentication, and other services are generally handled in the unicast mode according to the IPTV Business characteristics. For businesses such as BTV and nVOD, multicast is used. To meet the needs of refined management of Internet services, users can use pupv vlan division. For IPTV users, you can use PUPV (one user and one VLAN) based on the actual situation) or PSPV (one service and one VLAN. For VOD, authentication, and other unicast Data Stream-based services, data forwarding is relatively simple and will not be repeated here. The difficulty of IPTV access networks lies in the processing of BTV business multicast streams. In combination with IPTV in the initial development stage in China, most devices in the current network cannot directly support IPTV services, two solutions are proposed: centralized multicast replication and edge multicast replication. In the early stage of IPTV development, centralized replication was adopted when the number of users was small. Edge replication is used for business scale development. In this way, the stress of multicast replication is dispersed on corridor switches, which can meet the access requirements of a large number of IPTV users.

The solution supports PPPOE and DHCP + authentication. You can avoid the impact between users by Using VLAN or port isolation. Meanwhile, flexible QINQ can be used to precisely locate users and VLAN resources. In addition, the use of BRAS and home gateway to set the user's traffic and priority can effectively control the traffic in the access network, with QOS queue scheduling mechanism to ensure the video quality of IPTV services.

Pay attention to the following issues in the solution:

Business Separation

Differentiate different services by VLAN

Access authentication Problems

PPPOE or DHCP + Authentication

Multicast Replication

Centralized Replication

Edge Replication

QOS and security

Queue Scheduling

Dhcp snooping OPT82

User isolation

Fast Channel Switching

Access Switch unknown multicast discard