Falcon
M-Class
| User Guide
247
4.18
IP Multicast
Multicast is the delivery of information to a group of destinations simultaneously using the most
efficient strategy to deliver the messages over each link of the network only once, creating copies
only when the links to the destinations split.
Internet Group Management Protocol (IGMP) is an IP (Layer 3) protocol used for signaling of
multicast group membership (adding or removing clients to/from a multicast group)
IGMP snooping analyze all IGMP packets between hosts connected to the M-Class series and
multicast routers in the network. When the M-Class series snoops an IGMP Join or IGMP Report
from a host for a given multicast group, it adds the host's port number to the multicast list for that
group. When the M-Class series snoops an IGMP Leave, it removes the host's port from the table
entry.
The following sections explain and demonstrate in detail IGMP snooping support using the Web
screens description.
4.18.1
IGMP Snooping Configuration
IGMP is an acronym for
I
nternet
G
roup
M
anagement
P
rotocol. It is a communications protocol
used to manage the membership of Internet Protocol multicast groups. IGMP is used by IP hosts
and adjacent multicast routers to establish multicast group memberships. It is an integral part of
the IP multicast specification, like ICMP for unicast onnections. IGMP can be used for online video
and gaming, and allows more efficient use of resources when supporting these uses.
IPMC is an acronym for
IP
M
ulti
C
ast.
IPMC supports IPv4 and IPv6 multicasting. IPMCv4 denotes multicast for IPv4. IPMCv6 denotes
multicast for IPv6.
This section enables IGMP Snooping related configuration.
Figure 4-139: IGMP Snooping Configurations
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