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Configur-
ing Multi-
cast
2000-A2-GB20-10
Multicast (point-to-multipoint) is a communication feature that allows a
source host to send a message to a group of destination hosts.
Multicasting reduces traffic on the local network by sending only one
(multicast) packet out to a higher-bandwidth relay point.
Multicasting differs from broadcasting in that a receiver must join a
multicast group in order to receive group messages. Each multicast group
has its own group address, which is a Class D IP address—224.0.0.0—
239.255.255.255.
This chapter contains the following topics:
‹
Enabling and Disabling Global IP Multicasting (page 164)
‹
Configuring PIM—Dense Mode by Port (page 164)
‹
Adding and Changing the Multicast Route Source (page 166)
‹
Displaying IGMP Groups (page 166)
‹
Displaying the IGMP Querier (page 167)
‹
Displaying the Multicast Routing Table (page 167)
‹
Displaying PIM Neighbor (page 168)
NOTE
When the IAD prompts you for input, the current value is
displayed in parentheses. To conveniently accept the current
value, just press Enter.
Type M to display the Multicast Configuration menu:
Figure 10–1. Multicast Configuration Menu
*******************************************
Multicast Configuration Menu
*******************************************
E. Enable/Disable Global IP Multicasting
P. Config PIM - Dense Mode by Port
S. Add/Change Multicast Route Source
G. Show IGMP Group
Q. Show IGMP Querier
M. Show Multicast Routing Table
N. Show PIM Neighbor
- 163 -
February 2004
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