InHand InGateway501, User Manual

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InGateway Documentation, Release 0.0.1
4.3.3 Multicast Routing
Multicast routing establishes loop-free transmission paths from a data source to multiple receivers. These
paths form a multicast distribution tree. A multicast routing protocol establishes and maintains a multicast
routing table, and forwards multicast data packets correctly and efficiently based on the multicast routing
table.
4.3.3.1 Basic Settings
On the Basic tab page, you can specify a multicast data source. The basic parameters are described as
follows:
• Enable: enables or disables multicast routing.
• Source: specifies the IP address of the data source.
• Netmask: specifies the subnet mask of the source IP address.
• Interface: specifies the interface connected to the data source.
4.3.3.2 IGMP
The Internet Group Management Protocol (IGMP) is a multicast protocol in the IP protocol suite, and is
used by IP hosts to report their group membership to any immediately neighboring router. This protocol
defines the model of multicast communication between hosts on different network segments. Routers on these
network segments must support multicast communication. IGMP establishes and maintains multicast group
memberships between IP hosts and immediately neighboring multicast routers. It defines how the group
memberships of hosts on a network segment are maintained on a multicast router.The IGMP parameters are
described as follows:
• Upstream Interface: specifies the interface connected to the upstream network device.
• Downstream Interface List
– Downstream Interface: specifies the interface connected to a downstream terminal.
– Upstream Interface: specifies the interface connected to the upstream network device.
4.4 VPN
A VPN is a virtual private communication network established over the Internet depending on an Internet
service provider (ISP) and a network service provider (NSP). A virtual network refers to a logical network.
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