Chapter 12 IGMP Snooping
GS1510 Series User’s Guide
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12.3.1 IGMP Snooping and VLANs
The Switch can perform IGMP snooping on up to 4094 VLANs. You can configure
the Switch to automatically learn multicast group membership of any VLANs. The
Switch then performs IGMP snooping on the first VLANs that send IGMP packets.
This is referred to as auto mode. Alternatively, you can specify the VLANs that
IGMP snooping should be performed on. This is referred to as fixed mode. In fixed
mode the Switch does not learn multicast group membership of any VLANs other
than those explicitly added as an IGMP snooping VLAN.
12.4 General Settings
Click Advanced Settings > IGMP Snooping to display the screen as shown.
Figure 39 IGMP Snooping
The following table describes the labels in this screen.
Table 17 IGMP Snooping
LABEL DESCRIPTION
IGMP Snooping
State
Select Enable to activate IGMP Snooping to forward group multicast
traffic only to ports that are members of that group. Select Disable to
disactivate the feature.
IGMP Snooping
VLAN State
Select Add and enter VLANs upon which the Switch is to perform IGMP
snooping. The valid range of VLAN IDs is between 1 and 4094. Use a
comma (,) or hyphen (-) to specify more than one VLANs. Select
Delete and enter VLANs on which to have the Switch not perform IGMP
snooping.
Unknown
Multicast
Packets
Specify the action to perform when the Switch receives an unknown
multicast frame. Select Drop to discard the frame(s). Select Flooding
to send the frame(s) to all ports.
Apply Click Apply to save your changes to the Switch.
Refresh Click Refresh to begin configuring this screen afresh.
