ZyXEL Communications GS1510-24 Manual De Usuario

Chapter 12 IGMP Snooping

GS1510 Series User’s Guide

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.

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 

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.