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F
I G U R E
Multicast Service
Introduction
Multicast refers to point-to-multipoint communication in the
network. The multicast technology implements the point-to-
multipoint effective data transmission in the network. The core
of multicast technology is to copy the packet as close to receiver
as possible.
Functions
Source host just sends one data frame whose destination
address is address of the multicast group. All receivers in the
multicast group can receive same data frame copy. Other hosts
in network cannot receive the data except host (destination host)
in the multicast group. The multicast group is identified with
Type D IP address (224.0.0.0 ~ 239.255.255.255).
Features
Multicast features are as follows:
Multicast
ZXMSG 5200 system supports following modes:
Modes
1 9 – S V L A N C
O N C E P T
Lightens the server load. Server does not need to process
request of each subscriber.
Saves the network bandwidth.
Minimizes the network equipment requirements.
Multiple subscribers can access same service.
IGMP (Internet Group Management Protocol) Snooping
IGMP Proxy
IGMP Router
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 3 Service Functions
43
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