Polycom 7000 User Manual
NetEngine IAD User Guide
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.
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.
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:
u
Enabling and Disabling Global IP Multicasting (page
u
Configuring PIM—Dense Mode by Port (page
)
u
Adding and Changing the Multicast Route Source (page
)
u
Displaying IGMP Groups (page
)
u
Displaying the IGMP Querier (page
)
u
Displaying the Multicast Routing Table (page
u
Displaying PIM Neighbor (page
)
10. Multicast
Configuration
NOTE
When the IAD prompts you for input, the current value is
displayed in parentheses. To conveniently accept the current
value, just press Enter.
displayed in parentheses. To conveniently accept the current
value, just press Enter.