Allied Telesis AT-S21 - Manual (Page 67)

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Menu: MAC Address Table>Multicast addresses
A broadcast is a transmission that sends copies of a packet to all end
stations on the network. A multicast is a special form of broadcast
where copies of a packet are delivered to a specific group of end
stations.
A multicast address is a destination address. You can configure 10
(ten) multicast addresses per switch. Configuring a multicast address
in Omega enables you to restrict certain packets to only go to a
group of ports. For example, you may have a server running some
special applications and you do not want all end stations in the
network to receive packets from this server.
To configure a multicast address
1. Obtain your server’s MAC address; this might be the server with
restricted applications.
2. Select MAC Address Table>Multicast addresses to
display the following:
Figure 4-11 Multicast Address Menu
3. Enter the server’s Mac address from Step 1 as the multicast
address.
4. Enter one or more port numbers that are to receive multicast
packets from this server. Use one of the following formats:
1 to enter a single port
3, 8, 22 to enter multiple ports
all to enter all ports