Chapter 23 Multicast
GS1920 Series User’s Guide
170
The following table describes the labels in this screen. 
23.3.1  IGMP Snooping 
Click the IGMP Snooping link in the Advanced Application > Multicast > IPv4 Multicast 
screen to display the screen as shown. See Section 23.1 on page 165 for more information on 
multicasting.
Figure 126   Advanced Application > Multicast > IPv4 Multicast > IGMP Snooping
The following table describes the labels in this screen. 
Table 71   Advanced Application > Multicast > IPv4 Multicast 
LABEL DESCRIPTION
Index This is the index number of the entry.
VID This field displays the multicast VLAN ID. 
Port This field displays the port number that belongs to the multicast group. 
Multicast Group This field displays IP multicast group addresses.
Table 72   Advanced Application > Multicast > IPv4 Multicast > IGMP Snooping
LABEL DESCRIPTION
IGMP Snooping Use these settings to configure IGMP snooping.
Active Select Active to enable IGMP Snooping to forward group multicast traffic only to ports 
that are members of that group.
Querier  Select this option to allow the Switch to send IGMP General Query messages to the VLANs 
with the multicast hosts attached.
Host Timeout Specify the time (from 1 to 16 711 450) in seconds that elapses before the Switch 
removes an IGMP group membership entry if it does not receive report messages from 
the port.
802.1p Priority Select a priority level (0-7) to which the Switch changes the priority in outgoing IGMP 
control packets. Otherwise, select No-Change to not replace the priority.