unchanged, until the uplink up to the network side, the VLAN for Internet
business
Host(qinq-profile-30)# rule 2 translate cvlan 20 to 20 -------user VLAN
unchanged, the uplink direct to the network side, the SWD for SIP telephone
service
Host(qinq-profile-30)# rule 3 translate cvlan 30 to 30 -------user VLAN
unchanged, the uplink direct to the network side, VLAN30 for IPTV video on
demand services.
6. Multicast service introduction and
configuration
6.1 Multicast service introduction
Multicast is a communication to multiple recipients simultaneously to transmit
data, now widely used in IP video on demand service .FHL104C achieve the basic
multicast service functions, including IGMP V2, IGMP Snooping, IGMP proxy, and
VLAN-based Multicast.
IGMP proxy: mainly realize multicast query and multicast report function .
Query is of universal group query or a specific set of queries to the user multicast,
reporter is to response on the upper router query message .
IGMP Snooping: mainly realize multicast monitoring function, intact
forwarding multicast packets sent by the user side. Query the specific group at
the same time function.
Multicast based on VLAN: Support to verify MVLAN and process usersā add
and left .The system does not support multiple multicast VLAN currently ..
Multicast pre - adding features: support for a specific program to add features,
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