Gigabit Ethernet Switch User’s Guide
44
assign outgoing ports. You may also use this screen to allow dynamic updates via IGMP snooping by toggling
the last field to
Enabled
. Press APPLY to put the changes into effect.
Configure IGMP Filtering
Internet Group Management Protocol (IGMP) allows multicasting on your network. When IP Multicast
Filtering is enabled, the Switch can intelligently forward (rather that broadcast) IGMP queries and reports
sent between devices connected to the Switch and an IGMP-enabled device hosting IGMP on your network.
When enabled for IGMP snooping, the Switch can open or close a port to a specific Multicast group member
based on IGMP messages sent from the device to the IGMP host or vice versa.
To access the
IGMP Configuration
screen, select
Configure IGMP Filtering
from the
System
Configuration
menu. The following
IGMP Configuration
screen will appear:
Figure 6-22. IGMP Configuration screen
The item in this screen is defined as follows:
♦
IP Multicast Filtering (IGMP Snooping)
This enables or disables the Switch to intelligently
forward IGMP and Multicast packets instead of broadcasting (flooding) them on all ports. This setting
also enables IGMP Snooping, which enables the switch to read IGMP packets being forwarded through
the switch in order to obtain forwarding information from them (learn which ports contain Multicast
members).
Configure 802.1Q IGMP
If the Switch is in IEEE 802.1Q VLANs mode, the
IGMP
Configuration
screen will offer a VLAN Settings
section in the lower part of the screen. Select Configure 802.1Q IGMP to access the following
IEEE 802.1Q
IGMP Configuration
menu:
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