In setups where the stream server and STBs are in the same subnet, one of the devices in the multicast environment must act as an IGMP querier—ideally the device closest to the multicast source.
Currently, configuring a querier requires using CLI templates. Please add native support in the Omada Controller GUI for the following features:

Enable IGMP Querier on Specific VLANs
Example CLI:
ip igmp snooping vlan-config 30 querier

Set Custom Source IP for Querier Messages
Currently, the default source IP is 192.168.0.1, which is not ideal in multi-VLAN setups. The source IP should be configurable to match the VLAN where multicast traffic is expected (e.g., the CCTV VLAN).
Example CLI:
ip igmp snooping vlan-config 30 querier general-query source-ip 10.10.30.1

Ability to Configure Interface VLANs from GUI
Since assigning a source IP requires the VLAN interface to exist, allow us to define Interface VLANs directly from the Omada Controller, without relying on CLI templates.