Atrie DB-120 User Manual
User Manual
23
3.6.6
MULTICAST
Multicasting is a form of limited broadcast. UDP is used to send datagrams to all hosts that belong to
what is called a "host group." A host group is a set of zero or more hosts identified by the same
destination IP address. The following statements apply to host groups.
a.
Anyone can join or leave a host group at will.
b.
There are no restrictions on a host's location.
c.
There are no restrictions on the number of members that may belong to a host group.
d.
A host may belong to multiple host groups.
e.
Non-group members may send UDP datagrams to the host group.
Multicasting is useful when data needs to be sent to more than one other device. For instance, if one
device is responsible for acquiring data that many other devices need, then multicasting is a natural fit.
Note that using multicasting as opposed to sending the same data to individual devices uses less
network bandwidth.
To enable Multicasting, from the Home screen, click Advanced and under Advanced, select
Muliticast. Figure 16 illustrates a typical Multicast configuration.
Figure 16 (Multicast)
The apply button will temporarily save this connection. To make the change permanent you need to
click on
Tools
(at the top of the page) and select
System Commands
. At the system commands page,
click on
Save All
.
3.6.7
STATIC ROUTING
If the Gateway is connected to more than one network, you may need to set up a static route between
them. A static route is a pre-defined pathway that network information must travel to reach a specific
host or network. You can use static routing to allow different IP domain users to access the Internet
through the Gateway.
The New Destination IP is the address of the remote LAN network or host to which you want to
assign a static route. Enter the IP address of the host for which you wish to create a static route here.
For a standard Class C IP domain, the network address is the first three fields of the New Destination
IP, while the last field should be 0. The Subnet Mask identifies which portion of an IP address is the
