Advantech eki-7656c, User Manual, Page: 94 / 114

IGMP Configuration
The Internet Group Management Protocol (IGMP) is an internal protocol of the Internet Protocol (IP) suite.
IP manages multicast traffic by using switches, routers, and hosts that support IGMP. Enabling IGMP
allows the ports to detect IGMP queries, report packets, and manage IP multicast traffic through the
switch. IGMP have three fundamental types of message shown as follows:
Table 3.19: IGMP types
Message Description
Query
A message sent from the querier (IGMP router or switch) asking for a response from each host
belonging to the multicast group.
Report
A message sent by a host to the querier to indicate that the host wants to be or is a member of a
given group indicated in the report message.
Leave Group
A message sent by a host to the querier to indicate that the host has quit being a member of a
specific multicast group.
The switch supports IP multicast. You can enable IGMP protocol via setting the IGMP Configuration page
to see the IGMP snooping information. IP multicast addresses are in the range of 224.0.0.0 through
239.255.255.255.
•
IGMP Protocol:
Enable the IGMP
/MLD
protocol.
•
IGMP Query:
Select the IGMP query function as Enable or Auto to set the switch as a querier for
IGMP version 2 multicast networks.
Figure 3.4-43 IGMP Configuration interface
EKI-7656C_7656CI_Manual 84
•
Multicast VLAN
: Enter the specified VLAN IDs. IGMP/MLD snooping will maintain specified VLANs
with multicast forwarding table and learns multicast groups only on the specified multicast VLANs. The
Multi-cast VLAN function is only effective when the VLAN protocol is enabled,
o
therwise please leave it
blank.
•
Unknown Multicast Flood Control:
The function will control unknown multicast forwarding rule base
on the options:
(1)Blocking: Blocking all of the multicast packets on specific port.
(2)Flooding: Flooding all multicast packets to all ports.
(3)Multicast router port: Automatically build up the path from multicast source port to querier switch .
•
Click
Apply