ZyXEL Communications 4528F User Manual

Chapter 24 Multicast

XGS-4526/4528F/4728F User’s Guide

Click Advanced Applications > Multicast in the navigation panel. Click the 
Multicast Setting link and then the IGMP Snooping VLAN link to display the 
screen as shown. See 

 for more information on IGMP 

Snooping VLAN.

Figure 100   Advanced Application > Multicast > Multicast Setting > IGMP Snooping 

VLAN 

The following table describes the labels in this screen. 

Table 64   Advanced Application > Multicast > Multicast Setting > IGMP Snooping 
VLAN

Mode Select 

auto to have the Switch learn multicast group membership 

information of any VLANs automatically.

Select fixed to have the Switch only learn multicast group membership 
information of the VLAN(s) that you specify below.

In either auto or fixed mode, the Switch can learn up to 16 VLANs 
(including up to five VLANs you configured in the MVR screen). For 
example, if you have configured one multicast VLAN in the MVR screen, 
you can only specify up to 15 VLANs in this screen.

The Switch drops any IGMP control messages which do not belong to 
these 16 VLANs.

Note: You must also enable IGMP snooping in the Multicast 

Setting screen first. 

Apply

Click Apply to save your changes to the Switch’s run-time memory. The 
Switch loses these changes if it is turned off or loses power, so use the 
Save link on the top navigation panel to save your changes to the non-
volatile memory when you are done configuring.