
Industrial Managed
Ethernet Switch
User Manual
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2.10 IGMP/IP Multicast
The managed switch supports Internet Group Management Protocol
)
IGMP
(
which is a communication protocol
used on IP version 4 networks to establish multicast group memberships among switches in the network
.
IGMP is
an integral part of IPv4 multicast
.
It operates above the network layer of OSI model
.
One of the most important
features related to this protocol is IGMP snooping, which is supported by the managed switch and greatly
strengthens network functionality
.
The IGMP snooping is a process of
“listening”
to IGMP network traffic
.
By listening
to conversations between different devices, it maintains a map of links and IP multicast streams
.
This means that
multicast traffic may be filtered from the links of the managed switch which do not need them
.
Therefore, IGMP
snooping enables the managed switch to only forward multicast traffic to the links that have requested it
.
For IPv6
network, Multicast Listener Discovery protocol which is similar to IGMP is supported by EH75XX managed switch.
This section contains five submenus as shown in Figure 2.84 which are:
IGMP Setting
IGMP Statistics
IGMP/IP Multicast Table
Static IP Multicast
MLD (Multicast Listener Discovery)
Figure 2.84 IP Multicast Dropdown Menu
2.10.1 IGMP Settings
This webpage allows the users to set IGMP features on the managed switch as shown in Figure 2.85
There are
three features that can be enabled
:
IGMP Snooping
,
IGMP Proxy
, and
IGMP Fast
-
leave
.
After checking the
desired feature
’
s boxes, please click on the
Update
button to allow the options to take effect
.
The lower part of the
page lists
Router and Multicast Groups Information
which are router
’s IP and port information
summarizes the descriptions of IGMP
’
s Settings
.