Chapter 4. Web Configuration & Operation
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CHAPTER 4
WEB OPERATION & CONFIGURATION
Interface Channel Profile:
Select an IPMC profile from the drop-down menu. Click the
button to view a summary
about the selected IPMC profile settings.
Port Role:
Click the Port Role symbol to change the role status.
Inactive (I):
By default, all ports are set to inactive. Inactive ports do not participate in MVR operations.
Source (S):
Set a port (uplink ports) to source port. Source ports will receive and send multicast data. Subscribers
can not directly be connected to source ports. Please also note that source ports cannot be management ports at
the same time.
Receiver (R):
Set a port to receiver port. Client or subscriber ports are configured to receiver ports so that they
can issue IGMP/MLD messages to receive multicast data.
Immediate Leave Setting
Port:
The port number. “Port *” rule applies to all ports.
Immediate Leave:
Enable for disable immediate leave function. When enabled, the device immediately removes a
port from a multicast stream as soon as it receives leave message for that group. This option only applies to an
interface configured as MVR receivers.
4.3.11 IPMC
The “IPMC” menu includes IGMP Snooping and MLD Snooping sub menu. Select the appropriate menu to set up
detailed configurations.
4.3.11.1 IGMP Snooping
The Internet Group Management Protocol (IGMP) 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 can be used more efficiently when supporting activities, such as, online streaming video and
gaming.
IGMP Snooping is the process of listening to IGMP traffic. IGMP snooping, as implied by the name, is a feature that
allows the switch to “listen in” on the IGMP conversation between hosts and routers by processing the layer 3 packets
that IGMP packets sent in a multicast network.
When IGMP snooping is enabled in a switch, it analyses all the IGMP packets between hosts connected to the switch
and multicast routers in the network. When a switch receives an IGMP report for a given multicast group from a host,
the switch adds the host's port number to the multicast list for that group. When the switch hears an IGMP Leave, it
removes the host's port from the table entry.
IGMP snooping can reduce multicast traffic from streaming and other bandwidth intensive IP applications more
effectively. A switch using IGMP snooping will only forward multicast traffic to the hosts in that traffic. This reduction
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