Can the multicast client receive the multicast stream?
If both multicast stream and IGMP join/leave reaches this switch, then the multicast
client with issue should most likely be able to watch the channel through the IPTV.
If the multicast client can now receive the multicast stream, repeat the Multicast
Troubleshooting section.
If the multicast client still can receive the multicast stream, go to<OTHERS>.
Ensure that the Zyxel switch using Layer 2 IGMP Snooping is
the active querier.
When two devices have querier mode enabled, the device with the lower IP
address will assume the role of the active querier. In this case, we can configure the
interface IP address of the IGMP querier to the lowest possible IP address in the
network.
Using Web GUI:
Figure 17 Basic Setting > IP Setup